技术领域Technical field
本申请涉及光源技术领域，特别是一种波长转换装置、波长转换装置的制备方法及发光装置。The present application relates to the field of light source technology, in particular to a wavelength conversion device, a preparation method of the wavelength conversion device, and a light-emitting device.
背景技术Background technique
随着激光光源产品的发展，产品要求也向小体积、高亮度、高效率的方向升级。这就意味着其内部的波长转换装置的尺寸越来越小，其发光层所承受的激光功率密度越来越大。这就导致了对封装后的整个发光层的耐热和导热能力要求较高。With the development of laser light source products, product requirements have also been upgraded in the direction of small size, high brightness, and high efficiency. This means that the size of the internal wavelength conversion device is getting smaller and smaller, and the laser power density that the light-emitting layer withstands is getting larger and larger. This leads to higher requirements on the heat resistance and thermal conductivity of the entire light-emitting layer after encapsulation.
而目前的发光层所使用的发光陶瓷为了改善光饱和性能，降低光吸收的密度，一般会在发光陶瓷内部形成多孔结构以增加光散射，但是由于多孔陶瓷的热导率和机械强度相对较低，且多孔陶瓷由于存在微纳米空隙，对于后续形成的反射膜的反射率有着不利的影响。因而现有的波长转换装置对高功率密度激发光，无法在实现较高光饱和阈值的同时，保持高发光效率和机械强度。In order to improve the light saturation performance and reduce the density of light absorption, the current luminescent ceramics used in the luminescent layer generally form a porous structure inside the luminescent ceramic to increase light scattering. However, the thermal conductivity and mechanical strength of porous ceramics are relatively low. , and the presence of micro-nano voids in porous ceramics has a negative impact on the reflectivity of the subsequently formed reflective film. Therefore, existing wavelength conversion devices cannot achieve high light saturation threshold while maintaining high luminous efficiency and mechanical strength for high power density excitation light.
发明内容Contents of the invention
有鉴于此，本申请的目的是提供一种波长转换装置、波长转换装置的制备方法及发光装置，能够实现较高光饱和阈值的同时，保持高发光效率和机械强度。In view of this, the purpose of this application is to provide a wavelength conversion device, a preparation method of the wavelength conversion device, and a light-emitting device that can achieve a higher light saturation threshold while maintaining high luminous efficiency and mechanical strength.
为解决上述问题，本申请提供的第一个技术方案为：提供一种波长转换装置，包括依次层叠设置的多孔发光陶瓷层、过渡层、金属反射层、焊接层和导热基板；其中，过渡层致密发光陶瓷层，致密发光陶瓷层的孔体积含量为0.5％以下。In order to solve the above problems, the first technical solution provided by this application is to provide a wavelength conversion device, including a porous luminescent ceramic layer, a transition layer, a metal reflective layer, a welding layer and a thermally conductive substrate that are stacked in sequence; wherein, the transition layer The dense luminescent ceramic layer has a pore volume content of less than 0.5%.
可选地，发光陶瓷层的孔体积含量为1％-10％；孔的孔径范围为0.1μm-5μm。Optionally, the pore volume content of the luminescent ceramic layer is 1% to 10%; the pore diameter ranges from 0.1 μm to 5 μm.
可选地，发光陶瓷层选自YAG:Ce3+陶瓷或Al2O3-YAG:Ce3+陶瓷中的至少一种；其中，发光陶瓷层中Ce3+的为0.1％-0.5％。Optionally, the luminescent ceramic layer is selected from at least one of YAG:Ce3+ ceramics or Al2 O3 -YAG:Ce3+ ceramics; wherein the Ce3+ content in the luminescent ceramic layer is 0.1%-0.5%.
可选地，过渡层为YAG:Ce3+致密发光陶瓷层，YAG:Ce3+致密发光陶瓷层中Ce3+的含量为0.1％-0.5％。Optionally, the transition layer is a YAG:Ce3+ dense luminescent ceramic layer, and the Ce3+ content in the YAG:Ce3+ dense luminescent ceramic layer is 0.1%-0.5%.
可选地，过渡层的厚度与发光陶瓷层的厚度比为0.002-0.2。Optionally, the ratio of the thickness of the transition layer to the thickness of the luminescent ceramic layer is 0.002-0.2.
为解决上述技术问题，本申请提供的第二个技术方案为：提供一种波长转换装置的制备方法，制备方法包括：In order to solve the above technical problems, the second technical solution provided by this application is to provide a method for preparing a wavelength conversion device. The preparation method includes:
分别配置多孔发光陶瓷层的原料以及过渡层的原料，过渡层为致密发光陶瓷层；The raw materials of the porous luminescent ceramic layer and the raw materials of the transition layer are respectively configured, and the transition layer is a dense luminescent ceramic layer;
使用多孔发光陶瓷层原料以及过渡层原料中的一种原料压制成型制成压片，将另外一种原料放置于压片上，压制成型为叠压压片；Use one of the porous luminescent ceramic layer raw materials and the transition layer raw material to press-form into a tablet, place the other raw material on the tablet, and press-form into a laminated tablet;
将叠压压片进行烧结形成双层叠压陶瓷，包括多孔发光陶瓷层和过渡层；在过渡层上制备金属反射层；以及Sintering the laminated laminate to form a double-layer laminated ceramic, including a porous luminescent ceramic layer and a transition layer; preparing a metal reflective layer on the transition layer; and
金属反射层通过焊料焊接的方式设置于导热基板上。The metal reflective layer is disposed on the thermally conductive substrate by soldering.
可选地，多孔发光陶瓷层的原料包括氧化物陶瓷原料和造孔剂，造孔剂与氧化物陶瓷原料的质量比为1％-8％；过渡层的原料包括氧化物陶瓷原料。Optionally, the raw materials of the porous luminescent ceramic layer include oxide ceramic raw materials and pore-forming agents, and the mass ratio of pore-forming agent to oxide ceramic raw materials is 1%-8%; the raw materials of the transition layer include oxide ceramic raw materials.
可选地，使用多孔发光陶瓷层原料以及过渡层原料中的一种原料压制成型制成压片，将另外一种原料放置于压片上，压制成型为叠压压片的步骤包括：Optionally, one of the porous luminescent ceramic layer raw materials and the transition layer raw material is used to press-form into a pressed tablet, and the other raw material is placed on the pressed sheet. The step of pressing and forming into a laminated pressed sheet includes:
使用过渡层原料进行单轴压制，压力范围为5MPa-20MPa，得到单轴压制后的过渡层压片；以及Use the transition layer raw material to perform uniaxial pressing with a pressure range of 5MPa-20MPa to obtain a transition laminated sheet after uniaxial pressing; and
将单轴压制后的过渡层压片再进行冷等静压，压力范围为50MPa-300MPa，得到过渡层的压片。The uniaxially pressed transition laminated sheet is then subjected to cold isostatic pressing in a pressure range of 50MPa-300MPa to obtain a transition layer laminated sheet.
可选地，使用多孔发光陶瓷层原料以及过渡层原料中的一种原料压制成型制成压片，将另外一种原料放置于压片上，压制成型为叠压压片的步骤包括：Optionally, one of the porous luminescent ceramic layer raw materials and the transition layer raw material is used to press-form into a pressed tablet, and the other raw material is placed on the pressed sheet. The step of pressing and forming into a laminated pressed sheet includes:
将多孔发光陶瓷层的原料放置于过渡层的压片上，对多孔发光陶瓷层的原料进行单轴压制，压力范围为5MPa-20MPa，得到单轴压制后的多孔发光陶瓷层压片；以及Place the raw material of the porous luminescent ceramic layer on the pressed sheet of the transition layer, and uniaxially press the raw material of the porous luminescent ceramic layer at a pressure range of 5MPa-20MPa to obtain a uniaxially pressed porous luminescent ceramic laminate; and
将单轴压制后的多孔发光陶瓷层压片再进行冷等静压，压力范围为5MPa-30MPa，得到叠压压片。The uniaxially pressed porous luminescent ceramic laminate is then subjected to cold isostatic pressing in a pressure range of 5MPa-30MPa to obtain a laminated laminate.
为解决上述技术问题，本申请提供的第三个技术方案为：提供一种发光装置，发光装置包括激发光源和如上述任一项的波长转换装置。In order to solve the above technical problems, the third technical solution provided by this application is to provide a light-emitting device. The light-emitting device includes an excitation light source and a wavelength conversion device as described above.
本申请的有益效果是：本申请的波长转换装置，通过设置依次层叠的多孔发光陶瓷层、过渡层、金属反射层、焊接层和导热基板，同时设置过渡层为致密发光陶瓷，能够实现较高饱和阈值的同时，保持高发光效率和机械强度。The beneficial effects of this application are: the wavelength conversion device of this application can achieve higher performance by arranging a porous luminescent ceramic layer, a transition layer, a metal reflective layer, a welding layer and a thermally conductive substrate laminated in sequence, and at the same time arranging the transition layer to be a dense luminescent ceramic. saturation threshold while maintaining high luminous efficiency and mechanical strength.
附图说明Description of drawings
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.
图1是本申请提供的波长转换装置的一实施例的结构示意图；Figure 1 is a schematic structural diagram of an embodiment of a wavelength conversion device provided by this application;
图2是本申请提供的波长转换装置的制备方法的一实施例的流程示意图；Figure 2 is a schematic flow diagram of an embodiment of a method for preparing a wavelength conversion device provided by the present application;
图3是本申请提供的发光装置的结构示意图。Figure 3 is a schematic structural diagram of a light-emitting device provided by this application.
具体实施方式Detailed ways
下面结合附图和实施例，对本申请作进一步的详细描述。特别指出的是，以下实施例仅用于说明本申请，但不对本申请的范围进行限定。同样的，以下实施例仅为本申请的部分实施例而非全部实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The present application will be described in further detail below with reference to the accompanying drawings and examples. It is particularly pointed out that the following examples are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only some, not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.
本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。本领域技术人员显式地和隐式地理解的是，本申请所描述的实施例可以与其他实施例相结合。Reference in this application to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. Those skilled in the art understand explicitly and implicitly that the embodiments described herein may be combined with other embodiments.
本申请首先提出一种波长转换装置100，如图1所示，图1是本申请提供的波长转换装置的一实施例的结构示意图。本申请提供的波长转换装置100包括依次层叠设置的多孔发光陶瓷层10、过渡层20、金属反射层30、焊接层40和导热基板50，其中，过渡层20为致密发光陶瓷层，致密发光陶瓷层的孔体积含量为0.5％以下。This application first proposes a wavelength conversion device 100, as shown in Figure 1. Figure 1 is a schematic structural diagram of an embodiment of the wavelength conversion device provided by this application. The wavelength conversion device 100 provided by this application includes a porous luminescent ceramic layer 10, a transition layer 20, a metal reflective layer 30, a welding layer 40 and a thermally conductive substrate 50 that are stacked in sequence. The transition layer 20 is a dense luminescent ceramic layer, and the dense luminescent ceramic layer The pore volume content of the layer is less than 0.5%.
本申请提出的波长转换装置100，通过设置过渡层20为致密发光陶瓷层，致密发光陶瓷层(过渡层20)具有相对较高的机械强度，且与多孔发光陶瓷层10的结合强度也较高，使得多孔发光陶瓷层10和致密发光陶瓷层(过渡层20)整体的机械强度更高，耐热冲击，有利于提高光饱和性能；进一步致密发光陶瓷层(过渡层20)的气孔含量较少，热导率较高，可以实现对多孔发光陶瓷层10所产生的热量的有效热传导，有利于多孔发光陶瓷层10的散热，有利于提高光饱和性能；并且使用致密发光陶瓷层(过渡层20)使得后续形成金属反射层30的质量较高，反射率高，使得更多的激发光和转换光被反射出射或再次利用，整体的发光效率更高；此外，部分激发光会透过多孔发光陶瓷层10进入致密发光陶瓷层(过渡层20)，致密发光陶瓷层(过渡层20)也可以受激发光激发而发光，从而使得整体的发光效率更高。另外，使用多孔发光陶瓷层10，通过孔对激发光的散射，能够降低光吸收密度，也有利于提高光饱和性能。因而本申请提出的波长转换装置100，能够在实现较高光饱和阈值的同时保持高发光效率和机械强度。The wavelength conversion device 100 proposed in this application sets the transition layer 20 as a dense luminescent ceramic layer. The dense luminescent ceramic layer (transition layer 20) has relatively high mechanical strength, and the bonding strength with the porous luminescent ceramic layer 10 is also high. , making the overall mechanical strength of the porous luminescent ceramic layer 10 and the dense luminescent ceramic layer (transition layer 20) higher, resistant to thermal shock, and conducive to improving the light saturation performance; further densifying the luminescent ceramic layer (transition layer 20) has less pore content , the thermal conductivity is high, which can realize effective heat conduction of the heat generated by the porous luminescent ceramic layer 10, which is beneficial to the heat dissipation of the porous luminescent ceramic layer 10 and is beneficial to improving the light saturation performance; and the use of a dense luminescent ceramic layer (transition layer 20 ) makes the subsequently formed metal reflective layer 30 have higher quality and higher reflectivity, so that more excitation light and conversion light are reflected or reused, and the overall luminous efficiency is higher; in addition, part of the excitation light will emit light through the porous holes. The ceramic layer 10 enters the dense luminescent ceramic layer (transition layer 20), and the dense luminescent ceramic layer (transition layer 20) can also be excited by the excitation light to emit light, thereby making the overall luminous efficiency higher. In addition, using the porous luminescent ceramic layer 10 can reduce the light absorption density by scattering the excitation light through the holes, which is also beneficial to improving the light saturation performance. Therefore, the wavelength conversion device 100 proposed in this application can maintain high luminous efficiency and mechanical strength while achieving a higher light saturation threshold.
在一些实施例中，多孔发光陶瓷层10、过渡层20、金属反射层30和焊接层40可具有相同的尺寸，且每两个相邻且面对的表面直接连接。导热基板50的尺寸可等于或大于多孔发光陶瓷层10的尺寸；在导热基板50的尺寸大于多孔发光陶瓷层10的尺寸时，多孔发光陶瓷层10、过渡层20、金属反射层30和焊接层40可居中地设置在导热基板50上。In some embodiments, the porous luminescent ceramic layer 10 , the transition layer 20 , the metal reflective layer 30 and the welding layer 40 may have the same size, and every two adjacent and facing surfaces are directly connected. The size of the thermally conductive substrate 50 may be equal to or larger than the size of the porous luminescent ceramic layer 10; when the size of the thermally conductive substrate 50 is larger than the size of the porous luminescent ceramic layer 10, the porous luminescent ceramic layer 10, the transition layer 20, the metal reflective layer 30 and the welding layer 40 may be centrally disposed on the thermally conductive substrate 50 .
在一些实施例中，多孔发光陶瓷层10可为稀土离子掺杂的多孔单相发光陶瓷或多孔复相发光陶瓷等。例如可为多孔YAG:Ce3+单相陶瓷，也可以是多孔Al2O3-YAG:Ce3+复相陶瓷或LuAG:Ce3+单相陶瓷、多孔Al2O3-LuAG:Ce3+复相陶瓷等，本申请实施例对此不加以限定。优选的，稀土离子的掺杂含量为0.1％-0.5％，即稀土离子的质量占发光相总质量的质量比为0.1％-0.5％，进一步可为0.4％、0.3％、0.2％等。在一实施例中，可设置多孔发光陶瓷层10为多孔YAG:Ce3+单相陶瓷，可选地，Ce3+的含量可为0.1％-0.5％，即Ce3+与YAG:Ce3+的质量百分比为0.1％-0.5％。如此设置，使得稀土离子的掺杂含量相比于普通市售的荧光粉或发光陶瓷中的掺杂含量低，从而使得多孔发光陶瓷层10的单位体积内的发热低，避免发生热猝灭，使得多孔发光陶瓷层10具有更高的热稳定性以及光饱和性能。In some embodiments, the porous luminescent ceramic layer 10 may be a rare earth ion-doped porous single-phase luminescent ceramic or a porous multi-phase luminescent ceramic. For example, it can be porous YAG:Ce3+ single-phase ceramics, porous Al2 O3 -YAG:Ce3+ multi-phase ceramics or LuAG:Ce3+ single-phase ceramics, or porous Al2 O3 -LuAG:Ce3 + Complex phase ceramics, etc., the embodiments of this application are not limited to this. Preferably, the doping content of rare earth ions is 0.1%-0.5%, that is, the mass ratio of the rare earth ions to the total mass of the luminescent phase is 0.1%-0.5%, and may further be 0.4%, 0.3%, 0.2%, etc. In one embodiment, the porous luminescent ceramic layer 10 can be configured as a porous YAG:Ce3+ single-phase ceramic. Alternatively, the content of Ce3+ can be 0.1%-0.5%, that is, Ce3+ and YAG:Ce3 The mass percentage of+ is 0.1%-0.5%. Such an arrangement makes the doping content of rare earth ions lower than that of common commercially available phosphors or luminescent ceramics, thereby making the heat generation per unit volume of the porous luminescent ceramic layer 10 low and avoiding thermal quenching. The porous luminescent ceramic layer 10 has higher thermal stability and light saturation performance.
需要说明的是，上述复相陶瓷是指陶瓷基复合材料，其是“复合材料”大范畴下的一个小分支。所谓“复相”主要是指材料组分中存在两种或两种以上的物质“相”，故又称“多相陶瓷”。在由这样的复相陶瓷材料构成的发光陶瓷层10的内部具有较多的散射相。这里，“散射相”是指有别于主相材料的第二相材料，其功能是对入射的激发光形成一种散射效果，从而提升激发光的吸收率，进而提升对激发光的光转换效率。因此，陶瓷主相(即发光相)和散射相共同组成复相陶瓷材料，并且散射相作为第二相物质弥散在陶瓷主相中。由于存在大量的这样的散射相，所以光束在发光陶瓷层10的内部传播时会被多次散射。It should be noted that the above-mentioned composite phase ceramics refer to ceramic matrix composite materials, which is a small branch under the broad category of "composite materials". The so-called "multiphase" mainly refers to the presence of two or more material "phases" in the material components, so it is also called "multiphase ceramics". There are many scattering phases inside the luminescent ceramic layer 10 composed of such a multi-phase ceramic material. Here, the "scattering phase" refers to the second phase material that is different from the main phase material. Its function is to form a scattering effect on the incident excitation light, thereby increasing the absorption rate of the excitation light and thereby improving the light conversion of the excitation light. efficiency. Therefore, the main phase of the ceramic (i.e., the luminescent phase) and the scattering phase together constitute the composite ceramic material, and the scattering phase is dispersed in the main phase of the ceramic as a second phase material. Since there are a large number of such scattering phases, the light beam will be scattered multiple times when propagating inside the luminescent ceramic layer 10 .
在一些实施例中，设置多孔发光陶瓷层10的孔体积含量为1％-10％，例如多孔发光陶瓷层10的孔体积的含量为8％、5％、3％、1％。孔太多会导致多孔发光陶瓷层10的机械强度降低、光斑扩散严重且导热性能下降，孔太少则散射性能不足，通过设置多孔发光陶瓷层10的孔体积含量为1％-10％，可以在具有较好散射性能的同时保持良好的机械强度和导热性能。In some embodiments, the pore volume content of the porous luminescent ceramic layer 10 is set to 1%-10%, for example, the pore volume content of the porous luminescent ceramic layer 10 is 8%, 5%, 3%, or 1%. Too many holes will lead to a reduction in the mechanical strength of the porous luminescent ceramic layer 10, serious light spot diffusion, and a decrease in thermal conductivity. Too few holes will result in insufficient scattering performance. By setting the pore volume content of the porous luminescent ceramic layer 10 to 1%-10%, it can It has good scattering properties while maintaining good mechanical strength and thermal conductivity.
在一些实施例中，设置多孔发光陶瓷层10的孔径范围为0.1μm-5μm，例如多孔发光陶瓷层10的厚度为0.5μm、1μm、2μm、4μm，如此设置，使得多孔发光陶瓷层10在保证对光有效散射的同时，还能够保持一定的强度以及热导率。In some embodiments, the pore diameter of the porous luminescent ceramic layer 10 is set to be in the range of 0.1 μm-5 μm. For example, the thickness of the porous luminescent ceramic layer 10 is 0.5 μm, 1 μm, 2 μm, or 4 μm. This setting ensures that the porous luminescent ceramic layer 10 is While effectively scattering light, it can also maintain a certain intensity and thermal conductivity.
在一些实施例中，设置多孔发光陶瓷层10的厚度范围为0.05mm-0.5mm，例如多孔发光陶瓷层10的厚度为0.1mm、0.2mm、0.3mm、0.4mm、0.5mm，如此设置，不仅能够避免多孔发光陶瓷层10过薄导致的多孔发光陶瓷层10发光效率低，制作工艺不容易控制的问题；也能够避免多孔发光陶瓷层10过厚导致的多孔发光陶瓷层10发光效率和出光效率低的问题。In some embodiments, the thickness of the porous luminescent ceramic layer 10 is set to be in the range of 0.05mm-0.5mm. For example, the thickness of the porous luminescent ceramic layer 10 is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm. In this way, not only It can avoid the problems of low luminous efficiency of the porous luminescent ceramic layer 10 and difficulty in controlling the manufacturing process caused by the porous luminescent ceramic layer 10 being too thin. It can also avoid the luminous efficiency and light extraction efficiency of the porous luminescent ceramic layer 10 caused by being too thick. low question.
在一些实施例中，过渡层20可为稀土离子掺杂的致密单相发光陶瓷或致密复相发光陶瓷等。例如可为YAG:Ce3+单相陶瓷，也可以是Al2O3-YAG:Ce3+复相陶瓷或LuAG:Ce3+单相陶瓷、Al2O3-LuAG:Ce3+复相陶瓷等，本申请实施例对此不加以限定。优选的，稀土离子的掺杂含量为0.1％-0.5％，即稀土离子的质量占发光相总质量的质量比为0.1％-0.5％，进一步可为0.4％、0.3％、0.2％等。在一实施例中，可设置过渡层20为致密YAG:Ce3+单相陶瓷，可选地，Ce3+的含量可为0.1％-0.5％，即Ce3+与YAG:Ce3+的质量百分比为0.1％-0.5％。需要说明的是，为了使波长转换装置100能够实现较高饱和阈值的同时，保持高发光效率和机械强度，过渡层20的材质与多孔发光陶瓷层10的材质可相同，例如过渡层20的材质与多孔发光陶瓷层10的材质可都为YAG:Ce3+陶瓷。In some embodiments, the transition layer 20 may be a dense single-phase luminescent ceramic or a dense multi-phase luminescent ceramic doped with rare earth ions. For example, it can be YAG:Ce3+ single-phase ceramics, or it can be Al2 O3 -YAG:Ce3+ multi-phase ceramics or LuAG: Ce3+ single-phase ceramics, or Al2 O3 -LuAG:Ce3+ multi- phase ceramics. Ceramics, etc. are not limited in the embodiments of this application. Preferably, the doping content of rare earth ions is 0.1%-0.5%, that is, the mass ratio of the rare earth ions to the total mass of the luminescent phase is 0.1%-0.5%, and may further be 0.4%, 0.3%, 0.2%, etc. In one embodiment, the transition layer 20 can be set to be a dense YAG:Ce3+ single-phase ceramic. Alternatively, the content of Ce3+ can be 0.1%-0.5%, that is, the ratio of Ce3+ to YAG:Ce3+ The mass percentage is 0.1%-0.5%. It should be noted that, in order to enable the wavelength conversion device 100 to achieve a higher saturation threshold while maintaining high luminous efficiency and mechanical strength, the material of the transition layer 20 and the porous luminescent ceramic layer 10 can be the same, for example, the material of the transition layer 20 The material of the porous luminescent ceramic layer 10 may both be YAG:Ce3+ ceramic.
在一些实施例中，致密发光陶瓷层中稀土离子的掺杂含量要小于多孔发光陶瓷层中的稀土离子的掺杂含量，使得致密发光陶瓷层作为多孔发光陶瓷层10的发光的补充的同时不会影响光透过，使得波长转换装置100整体的发光效率和出光效率较高。In some embodiments, the doping content of rare earth ions in the dense luminescent ceramic layer is less than the doping content of rare earth ions in the porous luminescent ceramic layer, so that the dense luminescent ceramic layer supplements the luminescence of the porous luminescent ceramic layer 10 while not It will affect the light transmission, making the overall luminous efficiency and light extraction efficiency of the wavelength conversion device 100 higher.
在一些实施例中，致密发光陶瓷层的孔体积含量进一步可为0.4％以下、0.3％以下、0.2％以下，甚至0.1％以下，可以保证具有良好的机械强度、后续形成金属反射层20的良好成膜质量以及具有良好的热导率。In some embodiments, the pore volume content of the dense luminescent ceramic layer can further be below 0.4%, below 0.3%, below 0.2%, or even below 0.1%, which can ensure good mechanical strength and good stability of the subsequent formation of the metal reflective layer 20 Film forming quality and good thermal conductivity.
在一些实施例中，过渡层20的厚度与多孔发光陶瓷层10的厚度比为0.002-0.2，例如过渡层20的厚度与多孔发光陶瓷层10的厚度比为0.002、0.005、0.01、0.1、0.2，如此设置，能够实现波长转化装置100较高的机械强度，进一步保证发光效率较高的同时，减少光扩散。In some embodiments, the ratio of the thickness of the transition layer 20 to the thickness of the porous luminescent ceramic layer 10 is 0.002-0.2. For example, the ratio of the thickness of the transition layer 20 to the thickness of the porous luminescent ceramic layer 10 is 0.002, 0.005, 0.01, 0.1, 0.2. , such an arrangement can achieve higher mechanical strength of the wavelength conversion device 100, further ensuring higher luminous efficiency while reducing light diffusion.
请参阅图2，图2是本申请提供的波长转换装置的制备方法的一实施例的流程示意图，本申请还提出了一种波长转换装置的制备方法，包括如下步骤S11-S14。Please refer to Figure 2. Figure 2 is a schematic flow chart of an embodiment of a method for manufacturing a wavelength conversion device provided by this application. This application also proposes a method for preparing a wavelength conversion device, including the following steps S11-S14.
步骤S11：分别配置多孔发光陶瓷层的原料以及过渡层的原料，过渡层为致密发光陶瓷层。Step S11: Prepare the raw materials of the porous luminescent ceramic layer and the raw materials of the transition layer respectively. The transition layer is a dense luminescent ceramic layer.
在本申请实施例中，可分别配置多孔发光陶瓷层的原料以及过渡层的原料。其中，在一实施例中，多孔发光陶瓷层的原料包括氧化物陶瓷原料和造孔剂，造孔剂与氧化物陶瓷原料的质量比为1％-8％；过渡层的原料包括氧化物陶瓷原料。In the embodiment of the present application, the raw materials of the porous luminescent ceramic layer and the raw materials of the transition layer can be configured separately. In one embodiment, the raw materials of the porous luminescent ceramic layer include oxide ceramic raw materials and pore-forming agents, and the mass ratio of pore-forming agent to oxide ceramic raw materials is 1%-8%; the raw materials of the transition layer include oxide ceramics raw material.
在一实施例中，多孔发光陶瓷层以及过渡层的氧化物陶瓷原料均可由Y2O3，Al2O3以及CeO2构成，其中，过渡层为致密发光陶瓷层。也即，本申请提出的波长转换装置可采用上层多孔YAG:Ce3+陶瓷和下层致密YAG:Ce3+陶瓷的双层陶瓷形式，如此设置，使得上层的多孔YAG:Ce3+陶瓷能够实现对高功率激光的高效吸收和转化，另一方面下层的致密YAG:Ce3+陶瓷能够提升机械强度和热导率的同时，也能够实现高反射率的金属反射层制备。In one embodiment, the porous luminescent ceramic layer and the oxide ceramic raw material of the transition layer can be composed of Y2 O3 , Al2 O3 and CeO2 , wherein the transition layer is a dense luminescent ceramic layer. That is to say, the wavelength conversion device proposed in this application can be in the form of a double-layer ceramic with an upper layer of porous YAG:Ce3+ ceramics and a lower layer of dense YAG:Ce3+ ceramics. Such an arrangement enables the upper layer of porous YAG:Ce3+ ceramics to achieve Efficient absorption and conversion of high-power lasers. On the other hand, the dense YAG:Ce3+ ceramic in the lower layer can not only improve the mechanical strength and thermal conductivity, but also enable the preparation of high-reflectivity metal reflective layers.
步骤S12：使用多孔发光陶瓷层原料以及过渡层原料中的一种原料压制成型制成压片，将另外一种原料放置于压片上，压制成型为叠压压片。Step S12: Use one of the porous luminescent ceramic layer raw materials and the transition layer raw material to press-form into a pressed sheet, place the other raw material on the pressed sheet, and press-form into a laminated sheet.
在本申请实施例中，可使用多孔发光陶瓷层原料以及过渡层原料中的一种原料压制成型制成压片，同时将另外一种原料放置于压片上，将二者同时压制成型为叠压压片。In the embodiment of the present application, one of the raw materials of the porous luminescent ceramic layer and the raw material of the transition layer can be pressed and formed into a pressed sheet, while the other raw material is placed on the pressed sheet, and the two are simultaneously pressed and formed into a laminated sheet. Tablet pressing.
需要说明的是，本申请对于上述结构优先制成压片的顺序不加以限定，例如可以为多孔发光陶瓷层原料先制成压片，也可以为过渡层原料先制成压片，本申请以过渡层原料先制成压片为例进行说明。It should be noted that this application does not limit the order in which the above structures are preferably made into tablets. For example, the porous luminescent ceramic layer raw materials can be made into tablets first, or the transition layer raw materials can be made into tablets first. In this application, The raw material of the transition layer is first made into tablets for explanation.
可选地，可将多孔发光陶瓷层的原料加入造孔剂和粘接剂，使用磨球球磨，混合均匀后形成多孔发光陶瓷层的浆料；同时将过渡层的原料加入粘接剂，使用磨球球磨，混合均匀后形成过渡层的浆料。进一步的，将多孔发光陶瓷层的浆料以及过渡层的浆料进行干燥，干燥后得到多孔发光陶瓷层的粉体以及过渡层的粉体。Optionally, the raw materials of the porous luminescent ceramic layer can be added to the pore-forming agent and the adhesive, and milled with a grinding ball to form a slurry of the porous luminescent ceramic layer after mixing evenly; at the same time, the raw materials of the transition layer can be added to the adhesive and used Grind with a ball and mix evenly to form a transition layer slurry. Further, the slurry of the porous luminescent ceramic layer and the slurry of the transition layer are dried, and after drying, the powder of the porous luminescent ceramic layer and the powder of the transition layer are obtained.
可选地，造孔剂可为淀粉、聚苯乙烯微球、聚甲基丙烯酸甲酯微球等，粘接剂为聚乙烯醇缩丁醛等，本申请对此不加以限定。进一步的，造孔剂的含量可为8％以下，例如造孔剂的含量可以为8％、5％、1％；粘接剂的含量可为2％以下，例如粘接剂的含量为2％、1％、0.5％，本申请实施例对此不加以限定。Alternatively, the pore-forming agent can be starch, polystyrene microspheres, polymethylmethacrylate microspheres, etc., and the adhesive can be polyvinyl butyral, etc., which is not limited in this application. Further, the content of the pore-forming agent can be 8% or less, for example, the content of the pore-forming agent can be 8%, 5%, or 1%; the content of the adhesive can be less than 2%, for example, the content of the adhesive can be 2%. %, 1%, 0.5%, which are not limited in the embodiments of the present application.
进一步的，可将过渡层的粉体用单轴压片机于5MPa-20MPa的压力范围内进行压片成型，例如单轴压片机的压力可以设置为5MPa、10MPa、15MPa、20MPa。在压片成型后，为了提升过渡层的致密度，可将成型后的过渡层粉体于50MPa-300MPa的压力范围内冷等静压进一步压片以得到过渡层的压片，例如冷等静压的压力可以设置为50MPa、100MPa、200MPa、300MPa，本申请实施例对此不加以限定。Furthermore, the powder of the transition layer can be pressed into tablets using a uniaxial tablet press within a pressure range of 5MPa-20MPa. For example, the pressure of the uniaxial tablet press can be set to 5MPa, 10MPa, 15MPa, and 20MPa. After tableting, in order to improve the density of the transition layer, the formed transition layer powder can be further compressed by cold isostatic pressing in the pressure range of 50MPa-300MPa to obtain the transition layer tablets, for example, cold isostatic pressing The pressure can be set to 50MPa, 100MPa, 200MPa, or 300MPa, which is not limited in the embodiments of the present application.
进一步的，将多孔发光陶瓷层的粉体放置于过渡层的压片上，使用单轴压片机于5MPa-20MPa的压力范围内将其进行压片成型，例如单轴压片机的压力可以设置为5MPa、10MPa、15MPa、20MPa。为了提升多孔发光陶瓷层的致密度，可将成型后的多孔发光陶瓷层粉体于5MPa-30MPa的压力范围内冷等静压形成多孔发光陶瓷层以及过渡层的叠压压片，例如冷等静压的压力可以设置为5MPa、10MPa、20MPa、30MPa，本申请实施例对此不加以限定。Further, the powder of the porous luminescent ceramic layer is placed on the tablet of the transition layer, and a uniaxial tablet press is used to press the powder into tablets within a pressure range of 5MPa-20MPa. For example, the pressure of the uniaxial tablet press can be set. It is 5MPa, 10MPa, 15MPa, 20MPa. In order to improve the density of the porous luminescent ceramic layer, the molded porous luminescent ceramic layer powder can be cold isostatically pressed in the pressure range of 5MPa-30MPa to form a laminated sheet of the porous luminescent ceramic layer and the transition layer, such as cold, etc. The static pressure can be set to 5MPa, 10MPa, 20MPa, or 30MPa, which is not limited in the embodiments of the present application.
在其他实施例中，也可以优先制造多孔发光陶瓷层压片，再制造多孔发光陶瓷层以及过渡层的叠压压片，当然也可以先使用单轴压片机制造多孔发光陶瓷层和过渡层的预压叠压压片，然后进行对预压叠压压片进行冷等静压形成最后的叠压压片，本申请对此不加以限定。In other embodiments, the porous luminescent ceramic laminate can be manufactured first, and then the porous luminescent ceramic layer and the transition layer can be laminated. Of course, a uniaxial tablet press can also be used to manufacture the porous luminescent ceramic layer and the transition layer. The pre-pressed laminated tablet is then subjected to cold isostatic pressing to form the final laminated tablet, which is not limited in this application.
可选地，将成型后的叠压压片进行高温排胶。具体的，可将成型后的叠压压片使用烘箱于600℃以上的温度，干燥6小时以上的时间进行高温排胶。Optionally, the formed laminated sheets are debonded at high temperature. Specifically, the formed laminated sheet can be dried in an oven at a temperature above 600°C for more than 6 hours for high-temperature debinding.
步骤S13：将叠压压片进行烧结形成双层叠压陶瓷，包括多孔发光陶瓷层和过渡层。Step S13: The laminated laminate is sintered to form a double-layer laminated ceramic, including a porous luminescent ceramic layer and a transition layer.
在本申请实施例中，可将高温排胶后的叠压压片于1600℃-1800℃的温度范围内烧结形成双层叠压陶瓷，例如烧结温度可以为1600℃、1650℃、1700℃、1750℃、1800℃。优选的，为了得到出射光效率较高的双层叠压陶瓷，可将烧结温度范围设置为1650℃-1750℃，并将烧结后的双层叠压陶瓷保温4-8小时。由于多孔发光陶瓷层以及过渡层通过形成叠压压片然后共同烧结而成，可以保证两层之间具有良好的结合强度以及整体具有良好的机械强度。In the embodiment of the present application, the laminated laminate after high-temperature debinding can be sintered in the temperature range of 1600°C-1800°C to form a double-layer laminated ceramic. For example, the sintering temperature can be 1600°C, 1650°C, 1700°C, 1750°C. ℃, 1800℃. Preferably, in order to obtain a double-layer laminated ceramic with higher light emission efficiency, the sintering temperature range can be set to 1650°C-1750°C, and the sintered double-layer laminated ceramic can be kept warm for 4-8 hours. Since the porous luminescent ceramic layer and the transition layer are formed into laminated sheets and then sintered together, good bonding strength between the two layers and good overall mechanical strength can be ensured.
优选的，可将上述双层叠压陶瓷进一步的减薄和抛光，以形成上厚层多孔发光陶瓷层和下薄层过渡层。Preferably, the above-mentioned double-layer laminated ceramic can be further thinned and polished to form an upper thick porous luminescent ceramic layer and a lower thin transition layer.
步骤S14：在过渡层上制备金属反射层；以及金属反射层通过焊料焊接的方式设置于导热基板上。Step S14: Prepare a metal reflective layer on the transition layer; and arrange the metal reflective layer on the thermally conductive substrate by solder welding.
在本申请实施例中，可在过渡层上制备金属反射层。具体的，例如可使用蒸镀或溅射的方式在过渡层上镀金属反射层。In the embodiment of the present application, a metal reflective layer can be prepared on the transition layer. Specifically, for example, evaporation or sputtering may be used to coat a metal reflective layer on the transition layer.
需要说明的是，本申请对于金属反射层的材质不做限定，例如可以为银反射层，也可以为铝反射层。It should be noted that this application does not limit the material of the metal reflective layer. For example, it can be a silver reflective layer or an aluminum reflective layer.
可以理解的，由于金属银以及金属铝具有较高的反射率。因此，将金属银或金属铝作为金属反射层镀覆于过渡层上，可将从过渡层出漏的光进行反射，避免被其他材料所吸收而转换成热的形式存在，进行影响发光陶瓷的温度。同时由于反射银层具有良好的热导率，可有效将多孔发光陶瓷层产生的热量向导热基板进行传递。It is understandable that metallic silver and metallic aluminum have high reflectivity. Therefore, metal silver or metal aluminum is plated on the transition layer as a metal reflective layer, which can reflect the light leaking from the transition layer and prevent it from being absorbed by other materials and converted into heat, thereby affecting the luminescent ceramics. temperature. At the same time, because the reflective silver layer has good thermal conductivity, it can effectively transfer the heat generated by the porous luminescent ceramic layer to the thermal conductive substrate.
进一步的，金属反射层通过焊料焊接的方式设置于导热基板上，焊料的具体种类可根据实际需要选择，例如可选择金锡、银锡、铋锡焊料等。Furthermore, the metal reflective layer is disposed on the thermally conductive substrate through solder welding. The specific type of solder can be selected according to actual needs, for example, gold-tin, silver-tin, bismuth-tin solder, etc. can be selected.
在本申请一实施例中，导热基板可以为纯铜金属，当然也可为其他材质的导热基板，本申请实施例对此不加以特别限定。具体的，将纯铜金属的表面分别镀镍和镀金，如此得到导热基板。In an embodiment of the present application, the thermally conductive substrate may be pure copper metal, or of course may also be a thermally conductive substrate made of other materials, which is not particularly limited in the embodiment of the present application. Specifically, the surface of pure copper metal is plated with nickel and gold respectively, so as to obtain a thermally conductive substrate.
可以理解的，纯铜金属、金属镍以及金属金具有较强的热稳定性以及较高的导热率。因此，设置导热基板为纯铜金属，同时在其上镀镍以及镀金，能够有效的散发多孔发光陶瓷层产生的热量，避免多孔发光陶瓷层产生的热量积累。It can be understood that pure copper metal, metal nickel and metal gold have strong thermal stability and high thermal conductivity. Therefore, setting the thermally conductive substrate to pure copper metal and plating it with nickel and gold can effectively dissipate the heat generated by the porous luminescent ceramic layer and avoid the accumulation of heat generated by the porous luminescent ceramic layer.
需要说明的是，导热基板的厚度例如可为2mm以上，例如导热基板的厚度为2mm、5mm、10mm，本申请实施例对此不加以限定。It should be noted that the thickness of the thermally conductive substrate may be, for example, 2 mm or more. For example, the thickness of the thermally conductive substrate may be 2mm, 5mm, or 10mm, which is not limited in the embodiments of the present application.
本申请的波长转换装置，通过设置依次层叠的多孔发光陶瓷层、过渡层、金属反射层、焊接层和导热基板，同时设置过渡层为致密发光陶瓷，能够实现较高饱和阈值的同时，保持高发光效率和机械强度。The wavelength conversion device of the present application can achieve a higher saturation threshold while maintaining a high saturation threshold by arranging a porous luminescent ceramic layer, a transition layer, a metal reflective layer, a welding layer and a thermally conductive substrate that are stacked in sequence, and at the same time arranging the transition layer to be a dense luminescent ceramic. Luminous efficiency and mechanical strength.
本申请实施例还提供一种发光装置200，如图3所示，图3是本申请提供的发光装置的结构示意图。发光装置200包括如图1至图2所示实施例提供的波长转换装置100以及激发光源(图未示)，激发光源用于提供激发光束，波长转换装置100用于接收激发光束，并将其转换为转换光束。其中，激发光源可以包括激光和/或LED。需要说明的是，发光装置200包括如图1至图2所示实施例提供的波长转换装置100全部技术特征，且可实现如图1至图2所示实施例提供的波长转换装置100可实现的全部技术效果，为避免重复，在此不再赘述。发光装置具体可为照明装置或投影装置等，照明装置可包括车灯、舞台灯、探照灯等。An embodiment of the present application also provides a light-emitting device 200, as shown in Figure 3. Figure 3 is a schematic structural diagram of the light-emitting device provided by the present application. The light-emitting device 200 includes the wavelength conversion device 100 provided in the embodiment shown in FIGS. 1 to 2 and an excitation light source (not shown). The excitation light source is used to provide an excitation beam. The wavelength conversion device 100 is used to receive the excitation beam and convert it. Convert to conversion beam. Wherein, the excitation light source may include laser and/or LED. It should be noted that the light-emitting device 200 includes all the technical features of the wavelength conversion device 100 provided by the embodiment shown in FIGS. 1 to 2 , and can implement the wavelength conversion device 100 provided by the embodiment shown in FIGS. 1 and 2 . All technical effects will not be repeated here to avoid repetition. The light-emitting device may specifically be a lighting device or a projection device, etc. The lighting device may include car lights, stage lights, searchlights, etc.
需要说明的是，本申请实施例中介绍的多种可选的实施方式，彼此可以相互结合实现，也可以单独实现，对此本申请实施例不作限定。It should be noted that the various optional implementations introduced in the embodiments of the present application can be implemented in combination with each other or can be implemented individually, which is not limited by the embodiments of the present application.
在本申请的描述中，需要理解的是，术语“上”、“下”、“左”、“右”等指示方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以及特定的方位构造和操作。因此，不能理解为对本申请的限制。此外，“第一”、“第二”仅由于描述目的，且不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。因此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者多个该特征。本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience. This application and simplified description are not intended to indicate or imply that the device or element referred to must have a particular orientation, and be constructed and operate in a particular orientation. Therefore, it cannot be construed as a limitation on this application. In addition, the terms "first" and "second" are for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined by “first” and “second” may explicitly or implicitly include one or more of these features. In the description of this application, unless otherwise stated, the meaning of "plurality" is two or more.
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”等应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接连接，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。In the description of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Detachable connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood on a case-by-case basis.
上述实施例是参考附图来描述的，其他不同的形式和实施例也是可行而不偏离本申请的原理，因此本申请不应被建构成为在此所提出实施例的限制。更确切地说，这些实施例被提供以使得本申请会是完善又完整，且会将本申请范围传达给本领域技术人员。在附图中，组件尺寸及相对尺寸也许基于清晰起见而被夸大。在此所使用的术语只是基于描述特定实施例目的，并无意成为限制。术语“包含”及/或“包括”在使用于本说明书时，表示所述特征、整数、构件及/或组件的存在，但不排除一或更多其他特征整数、构件、组件及/或其族群的存在或增加。除非另有所示，陈述时，数值范围包含该范围的上下限及其间的任何子范围。The above embodiments are described with reference to the accompanying drawings. Other different forms and embodiments are possible without departing from the principles of the present application, and therefore the present application should not be construed as limited to the embodiments proposed herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will convey the scope of the disclosure to those skilled in the art. In the drawings, component sizes and relative sizes may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. The terms "comprises" and/or "including" when used in this specification indicate the presence of stated features, integers, components and/or components, but do not exclude the presence of one or more other features, integers, components, components and/or components thereof. The existence or increase of ethnic groups. Unless otherwise indicated, when stated, numerical ranges include the upper and lower limits of the range and any subranges therebetween.
以上所述仅为本申请的部分实施例，并非因此限制本申请的保护范围，凡是利用本申请说明书及附图内容所作的等效装置或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。The above are only some of the embodiments of the present application, and are not intended to limit the scope of protection of the present application. Any equivalent device or equivalent process transformation made using the contents of the description and drawings of the present application, or directly or indirectly used in other related The technical fields are all equally included in the scope of patent protection of this application.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210708486.9ACN117293643A (en) | 2022-06-17 | 2022-06-17 | Wavelength conversion device, preparation method of wavelength conversion device and light-emitting device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210708486.9ACN117293643A (en) | 2022-06-17 | 2022-06-17 | Wavelength conversion device, preparation method of wavelength conversion device and light-emitting device |
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| CN117293643Atrue CN117293643A (en) | 2023-12-26 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210708486.9APendingCN117293643A (en) | 2022-06-17 | 2022-06-17 | Wavelength conversion device, preparation method of wavelength conversion device and light-emitting device |
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