CN1180677A - Modification method for nanometre affixation of alumina ceramic - Google Patents

Abstract

A method for modifying alumina ceratmic may be any of the ways used in proportioning step: a, direct addition of nm-class Al2O3, b, using nm-class Al2O3 to partially rephace coarse Al2O3 crystal in original formula, c, direct addition of one or more kinds of nm-class additive, and d, using correspodnent nm-class material to replace part or all of one or more kinds of additive in original formula. The alumina ceramic prepared with present invention has higher heat shock resistance and cracking toughness and lower brittleness.

Description

Translated fromChinese

纳米添加氧化铝陶瓷的改性方法Modification method of nano-added alumina ceramics

本发明涉及以氧化铝为基料的陶瓷的改性方法。The invention relates to a method for modifying ceramics with alumina as the base material.

氧化铝陶瓷是指以氧化铝(Al₂O₃)为主成份的陶瓷，其附加成份(或称为添加剂)可以有：SiO₂、MgO、TiO₂、CaO、BaO和MnO等.Alumina ceramics refer to ceramics with alumina (Al₂ O₃ ) as the main component, and its additional components (or called additives) can include: SiO₂ , MgO, TiO₂ , CaO, BaO and MnO, etc.

现有的氧化铝陶瓷的生产工艺流程是；The existing production process of alumina ceramics is;

配料——混料——打浆(或造粒)——成型——烧结Ingredients - mixing - beating (or granulation) - molding - sintering

所采用的原材料有：Al₂O₃、SiO₂、MgO、TiO₂、BaO和MnO等，原材料的粒度一般为0.2μm以上。The raw materials used include: Al₂ O₃ , SiO₂ , MgO, TiO₂ , BaO and MnO, etc. The particle size of the raw materials is generally above 0.2 μm.

氧化铝陶瓷还根据其主晶相的不同，可以分为刚玉陶瓷，刚玉——莫来石陶瓷及莫来石陶瓷。Alumina ceramics can also be divided into corundum ceramics, corundum-mullite ceramics and mullite ceramics according to their main crystal phases.

氧化铝陶瓷制品具有良好的化学稳定性，高的硬度和耐磨性，以及良好的耐热性。但缺点是：脆性大，热稳定性能(耐温度激变性或抗热震性)差。Alumina ceramic products have good chemical stability, high hardness and wear resistance, and good heat resistance. But the disadvantages are: high brittleness, poor thermal stability (temperature shock resistance or thermal shock resistance).

本发明目的是提供一种能降低Al₂O₃陶瓷的脆性，提高其抗热震性、强度和断裂韧性等性能的改性方法。The purpose of the present invention is to provide a modification method that can reduce the brittleness of Al₂ O₃ ceramics and improve its thermal shock resistance, strength and fracture toughness.

本发明方法是沿用已有的Al₂O₃陶瓷生产工艺流程：The inventive method is to continue to use the existing_Al2O3 ceramic production process flow_:

配料——混料——打浆(或造粒)——成型——烧结Ingredients - mixing - beating (or granulation) - molding - sintering

已有的原材料：Al₂O₃、SiO₂、MgO、TiO₂、BaO和MnO，粒度在0.2μm以上。本发明所用Al₂O₃的含量为60～99.99％，且Al₂O₃是主成份，其余的均为添加剂。本发明所用Al₂O₃及添加剂的粒度为10～100nm。Existing raw materials: Al₂ O₃ , SiO₂ , MgO, TiO₂ , BaO and MnO, with a particle size above 0.2 μm. The content of Al₂ O₃ used in the present invention is 60-99.99%, and Al₂ O₃ is the main component, and the rest are additives. The particle size of Al₂ O₃ and additives used in the present invention is 10-100 nm.

本发明的改性方法是在配料或混料工序时，通过下述的一种或几种方法完成的：The modified method of the present invention is completed by one or more of the following methods during the batching or mixing process:

A.直接添加纳米Al₂O₃；A. Add nano Al₂ O₃ directly;

B.用纳米Al₂O₃部分替代原配方中的粗晶Al₂O₃；B. Partially replace the coarse-grained Al₂ O₃ in the original formula with nanometer Al₂ O₃ ;

C.直接添加一种或几种纳米粒度的添加剂；C. Directly add one or several nano-sized additives;

D.用相应的纳米粒度的材料部分或全部代替原配方中的一种或几种添加剂；D. Partially or completely replace one or several additives in the original formula with corresponding nano-sized materials;

本发明改性方法的纳米材料的添加或替代量范围为：0.1～40％(wt)；纳米Al₂O₂可以是α相或γ相；纳米SiO₂可以是晶态或非晶态；纳米TiO₂可以是锐钛矿或金红石相。The range of the addition or replacement amount of the nanometer material in the modification method of the present invention is: 0.1% to 40% (wt); the nanometer Al₂ O₂ can be an α phase or a γ phase; the nanometer SiO₂ can be crystalline or amorphous;_TiO2 can be in anatase or rutile phase.

用本发明方法制备出的Al₂O₃陶瓷，不仅可以显著地提高陶瓷的强度和断裂韧性，更重要的是提高了抗热震性。本发明方法将使Al₂O₃陶瓷具有更新更广泛的应用前景。The Al₂ O₃ ceramics prepared by the method of the invention can not only significantly improve the strength and fracture toughness of the ceramics, but more importantly, improve the thermal shock resistance. The method of the invention will make Al₂ O₃ ceramics have newer and wider application prospects.

实施例：Example:

1.在Al₂O₃基板材料中添加5％纳米Al₂O₃，其热稳定性比已有Al₂O₃陶瓷基板材料提高2～3倍，热导率提高10～15％，烧结平整度可以提高1、5划，晶粒度显著降低。1. Adding 5% nanometer Al₂ O₃ to the Al₂ O₃ substrate material, its thermal stability is 2-3 times higher than that of the existing Al₂ O₃ ceramic substrate material, the thermal conductivity is increased by 10-15%, and the sintering is smooth The degree can be increased by 1 or 5 strokes, and the grain size is significantly reduced.

2.在99瓷中添加10％的纳米Al₂O₃，经1600℃绕结后，陶瓷的强度和断裂韧性均可以提高50％以上，抗热震性也大幅度提高。2. Adding 10% nano-Al₂ O₃ to 99 ceramics, after winding at 1600°C, the strength and fracture toughness of the ceramics can be increased by more than 50%, and the thermal shock resistance is also greatly improved.

Claims (8)

Translated fromChinese

1.一种纳米添加氧化铝陶瓷的改性方法，工艺过程是：配料——混料——打浆(或造粒)——成型——烧结，原料用粒度为0.2μm以上的粗晶Al₂O₃、SiO₂、MgO、TiO₂、BaO和MnO等，其特征在于，在配料工序时，可以：a.直接添加纳米Al₂O₃；1. A modification method of adding nano-alumina ceramics, the process is: batching - mixing - beating (or granulation) - molding - sintering, the raw material is coarse-grained Al₂ with a particle size of 0.2 μm or more O₃ , SiO₂ , MgO, TiO₂ , BaO and MnO, etc. are characterized in that, during the batching process, it is possible to: a. directly add nano-Al₂ O₃ ;b.用纳米Al₂O₃部分替代原配方中的粗晶Al₂O₃；b. Partially replace the coarse-grained Al₂ O₃ in the original formula with nano-Al₂ O₃ ;c.直接添加一种纳米粒度的添加剂；c. Directly add a nano-sized additive;d.直接添加几种纳米粒度的添加剂；d. Directly add several nano-sized additives;e.用相应的纳米粒度的材料部分替代原配方中一种添加剂；e. Partially replace one of the additives in the original formula with the corresponding nano-sized material;f.用相应的纳米粒度的材料全部替代原配方中一种添加剂；f. Replace one of the additives in the original formula with the corresponding nano-sized materials;g.用相应的纳米粒度的材料部分替代原配方中几种添加剂；g. Partially replace several additives in the original formula with corresponding nano-sized materials;h.用相应的纳米粒度的材料全部替代原配方中几种添加剂。h. Replace several additives in the original formula with corresponding nano-sized materials.2.如权利要求1所述的方法，其特征在于：2. The method of claim 1, wherein:a.直接添加纳米Al₂O₃；a. Directly add nano Al₂ O₃ ;b.用纳米Al₂O₃部分替代原配方中的粗晶Al₂O₃；b. Partially replace the coarse-grained Al₂ O₃ in the original formula with nano-Al₂ O₃ ;c.直接添加一种纳米粒度的添加剂；c. Directly add a nano-sized additive;d.直接添加几种纳米粒度的添加剂；d. Directly add several nano-sized additives;e.用相应的纳米粒度的材料部分替代原配方中一种添加剂；e. Partially replace one of the additives in the original formula with the corresponding nano-sized material;f.用相应的纳米粒度的材料全部替代原配方中一种添加剂；f. Replace one of the additives in the original formula with the corresponding nano-sized materials;g.用相应的纳米粒度的材料部分替代原配方中几种添加剂；g. Partially replace several additives in the original formula with corresponding nano-sized materials;h.用相应的纳米粒度的材料全部替代原配方中几种添加剂。也可以在混料工序时进行。h. Replace several additives in the original formula with corresponding nano-sized materials. It can also be carried out during the mixing process.3.如权利要求1所述的方法，其特征在于，所用Al₂O₃的含量为60～99.99％；Al₂O₃是主成份；SiO₂、MgO、TiO₂、BaO、MnO、CaO是添加剂。3. The method according to claim 1, characterized in that the content of Al₂ O₃ used is 60-99.99%; Al₂ O₃ is the main component; SiO₂ , MgO, TiO₂ , BaO, MnO, CaO are additive.4.如权利要求1所述的方法，其特征在于，用于替代、添加的Al₂O₃、SiO₂、MgO、TiO₂、BaO、MnO、CaO的粒度为10～100nm。4. The method according to claim 1, characterized in that the particle size of Al₂ O₃ , SiO₂ , MgO, TiO₂ , BaO, MnO, and CaO used for substitution and addition is 10-100 nm.5.如权利要求1所述的方法，其特征在于，纳米材料的添加、替代量范围为0.1～40％(wt)。5. The method according to claim 1, characterized in that the range of addition and substitution of nanomaterials is 0.1-40% (wt).6.如权利要求1所述的方法，其特征在于，纳米Al₂O₃可以是α相、γ相。6. The method according to claim 1, characterized in that the nano Al₂ O₃ can be α phase, γ phase.7.如权利要求1所述的方法，其特征在于，纳米可以是晶态、非晶态。7. The method according to claim 1, characterized in that the nanometer can be in crystalline or amorphous state.8.如权利要求1所述的方法，其特征在于，纳米TiO₂可以是锐钛矿、金红石相。8. The method according to claim 1, characterized in that the nano TiO₂ can be in anatase or rutile phase.