Electronic display unit high intensity protective glass plateTechnical field
The present invention relates to a kind of glass plate, and in particular to be electronic display unit high intensity protective glass plate.
Background technology
With the high speed development for the man-machine touch-control industry of representative such as mobile phone, flat board, high alumina glass plate has substituted traditionSoda-lime glass plate, as the product protection glass plate such as mobile phone, flat board.But as people are to lightweights such as mobile phone, flat boardsPursuit, i.e., display screen is bigger, more thinning, and during routine use, display device can be because improper use, and carelessness is bigMeaning, causes falling, colliding for equipment, and then cause the breakage of protective glass.Therefore, this thinning just to high alumina glass plate andIntensity proposes higher requirement.
Technically, the glass of 0.1~1.1mm thickness is typically called ultra-thin glass, classified by manufacturing technique method, hadFloat glass process ultra-thin glass, lattice method（Horizontal drawing）Ultra-thin glass, glass tube down-drawing ultra-thin glass.According to the difference of chemical composition, ultra-thin glass canIt is divided into ultra-thin glass containing alkali and alkali-free ultra-thin glass.Ultra-thin glass containing alkali refers to containing alkali metal oxide in chemical compositionUltra-thin glass, i.e. soda-lime-silica glass or alumina silicate glass.Current glass making processes mainly have float glass process moulding process and overflowTwo kinds of method moulding process.
Float glass is floated on metallic tin liquid level by glass metal and gained the name.The shaping of glass, is the glass metal transformation of meltingFor the process with fixed geometry product, glass must could be molded in certain temperature range, in shaping, glass metalIn addition to mechanical movement is made, also continuous heat transfer is carried out with surrounding medium.Due to cooling down and hardening, glass is first by sticky liquidState is changed into mouldable state, is then transformed into fragility solid-state again.Therefore, the forming process of glass be extremely complex a variety of properties notThe synthesis of same-action.In production, the forming process of glassware is divided into shaping and two stages of sizing, and the first stage is to confer toProduct is with certain geometry, and second stage is that the shape of product is fixed up.
Forming method has a variety of, including low temperature stretching method, Xu Leng stretching methods etc.；Wherein, Xu Leng stretching methods are conventional at presentThin glass generation method.Xu Lengfa is without rapidly cooling zone and area of reheating, and temperature curve is gently dipping.By process engineering4 subregions can be divided into, that is, shakeout polishing area, Xu Lengqu, shaping area and cooling zone.
（1）Shakeout polishing area：The corresponding range of viscosities of region glass is reasonably controlled, is conducive to enabling glass metal abundantShakeout and polish, reach natural equilibrium thickness.
（2）Xu Lengqu：The glass tape of nature thickness is reached because being acted on by outlet withdrawing roll tractive force shakeouing area, at thisRegion starts extending longitudinally.Thickness and width will be reduced during glass extending longitudinally simultaneously, but the latter is more notable than former variant.
（3）Shaping area：The region is the important area of glass thinning.In the region according to production needs, it is some right to setEdge machine, to glass tape with horizontal and vertical pulling force, makes glass tape laterally draw thin, glass is reduced while glass tape is broadeningThe thickness of band.
（4）Cooling zone：Glass tape is no longer opened up thin in the region, but progressively cools down.
At present, the ultra-thin usual thickness of aluminosilicate protective glass of float glass process is 0.55mm~0.7mm.
The content of the invention
It is an object of the invention to solve thinning and intensity of the existing display screen to high alumina glass plate propose it is higherIt is required that the problem of；A kind of electronic display unit solved the above problems high intensity protective glass plate is provided.
To reach above-mentioned purpose, technical scheme is as follows：
Electronic display unit high intensity protective glass plate, is made up of the composition of following masses percentage：
SiO2：59~64%, Al2O3：13~17%, Na2O：11%~15%, K2O：0.1%~6.5%, MgO：5.1%~7%,CaO：0%~0.7%, SrO：0%~0.2%, ZrO2：0%~1.2%.
Wherein, Na2O、K2O is glass network modifier oxides, and sodium ion and potassium ion occupy the space of glass structure networkIn, Na2O and K2O, which can provide free oxygen, increases the O/Si ratios in glass structure, occurs scission of link, thus can reduce glassViscosity, make glass be easy to melting, be the good cosolvent of glass；And the radius ratio sodium ion of potassium ion is big, potash glass it is viscousDegree is bigger than soda-lime glass, thus K2O addition can effectively reduce the tendency towards devitrification of glass, increase the transparency and glossiness of glass.Aluminum oxide is present in the network structure of glass as a kind of intermediate oxide, plays between network generation body and network outer bodyEffect.
Because CaO is the network modifying oxide of divalence, main function in glass is stabilizer, that is, increases the change of glassLearn stability and mechanical strength.MgO can make the setting rate of glass slack-off, improve the processability of glass；And MgO can also dropLow crystallization tendency and crystallization rate, increase the high temperature viscosity of glass, improve the chemical stability and mechanical strength of glass.
Found in being studied repeatedly by the actual production for many years to glass and laboratory test, by adjusting frit sideProportioning, can make glass plate in melting process, when polishing area and shaping area are shakeout in glass metal arrival, efficiently control viscosityScope, thus when being processed using the raw material components of said ratio, be conducive to the production of sheet glass, and pass through above-mentioned raw materialsComponent can produce the glass plate that minimum thickness is 0.4mm.When the glass plate produced is less than 1mm thickness, after chemical temperingStress layer depth at least above 35 μm, under 200g load-up conditions tie up formula hardness at least above 800HV.
Mode is preferably set up as one kind, each raw material components are prepared into glass plate by float glass process moulding process, shouldIn float glass process moulding process, when positioned at shakeout polishing area when, viscosity of glass metal is 103.2~103.6Pa ﹒ S；When positioned at shaping area,Viscosity of glass metal is 102.7~103.2Pa ﹒ S.By the limitation of above-mentioned range of viscosities, effectively make the thickness of glass produced minimumIt can reach 0.4mm.
Further, in order to be conducive to chemical enhanced progress, thus appropriate level is added in alumina silicate glassNa2O、K2O、Al2O3Deng oxide；I.e. heretofore described Na2O and K2O total amount is 13.5%~19.5%；Al2O3And Na2O'sRatio≤1.3.
Further, in order to be optimal ground effect, the Na2O and K2O total amount is preferably 14.5%~18%.
In order to meet the demand of electronic display unit, sheet thickness of the present invention is set to 0.4mm~1mm.
The present invention compared with prior art, with advantages below and beneficial effect：
1st, be processed by the raw material components that match of the present invention, be conducive to the production of sheet glass, and by float glass process intoThickness of glass that type technique productions go out is minimum to can reach 0.4mm；
2nd, the glass plate produced by present invention proportioning, entered after chemical tempering, its stress layer depth is at least above 35 μM, ties up formula hardness at least above 800HV under 200g load-up conditions；
3rd, the glass plate that the present invention is made possesses higher case hardness and intensity, further improves the product of glass plateMatter, so as to extend its service life, reaches the purpose of the electronic components such as protection display screen.
Embodiment
With reference to embodiment, the present invention is described in further detail, but the implementation of the present invention is not limited to this.
Embodiment
Electronic display unit high intensity protective glass plate, is matched somebody with somebody according to the component ratio of embodiment 1 to 12 in table 1Than obtaining the glass plate of different constituent contents；Meanwhile, it is right in five groups of control experiment groups, i.e. table 1 to be given in the present embodimentAccording to 1 group to 5 groups of control.
Table 1
| Numbering | SiO2 | Al2O3 | Na2O | K2O | MgO | CaO | SrO | ZrO2 |
| Embodiment 1 | 59.00% | 13.50% | 14.00% | 5.50% | 6.50% | 0.40% | 0.10% | 1.00% |
| Embodiment 2 | 61.80% | 13.50% | 13.00% | 5.10% | 5.10% | 0.40% | 0.10% | 1.00% |
| Embodiment 3 | 60.60% | 13.00% | 14.42% | 4.60% | 5.80% | 0.48% | 0.12% | 0.98% |
| Embodiment 4 | 59.50% | 15.60% | 15.00% | 3.18% | 5.10% | 0.52% | 0.10% | 1.00% |
| Embodiment 5 | 61.50% | 13.50% | 14.68% | 2.10% | 6.50% | 0.52% | 0.20% | 1.00% |
| Embodiment 6 | 61.00% | 13.80% | 13.60% | 3.28% | 7.00% | 0.48% | 0.10% | 0.74% |
| Embodiment 7 | 58.72% | 16.00% | 14.20% | 3.20% | 5.80% | 0.70% | 0.18% | 1.20% |
| Embodiment 8 | 61.20% | 14.20% | 11.50% | 6.50% | 5.50% | 0.00% | 0.10% | 1.00% |
| Embodiment 9 | 61.80% | 14.00% | 14.00% | 2.18% | 6.50% | 0.62% | 0.00% | 0.90% |
| Embodiment 10 | 61.80% | 13.00% | 13.76% | 3.20% | 6.50% | 0.62% | 0.12% | 0.00% |
| Embodiment 11 | 59.00% | 13.50% | 15.00% | 6.00% | 5.50% | 0.40% | 0.10% | 0.50% |
| Embodiment 12 | 63.00% | 17.00% | 11.00% | 1.00% | 7.00% | 0.40% | 0.10% | 0.50% |
| Compare 1 group | 59.00% | 19.00% | 11.50% | 4.60% | 5.20% | 0.10% | 0.10% | 0.50% |
| Compare 2 groups | 66.00% | 10.50% | 9.50% | 5.60% | 5.20% | 0.10% | 0.10% | 3.00% |
| Compare 3 groups | 62.50% | 16.00% | 10.00% | 5.60% | 5.20% | 0.10% | 0.10% | 0.50% |
| Compare 4 groups | 63.60% | 6.00% | 11.50% | 6.50% | 6.80% | 0.60% | 4.00% | 1.00% |
| Compare 5 groups | 59.50% | 13.10% | 15.00% | 7.00% | 5.10% | 0.00% | 0.30% | 0.00% |
The specific preparation process of glass plate is as follows in the present invention：Component ratio according to above-mentioned table 1 is matched, and will be mixedRaw material loads hermetic bag, is mixed in hermetic bag, then pours into platinum crucible and melts, melten glass liquid is cast in into goldBelong in mould, glass is put into annealing furnace annealing cooling together with metal pattern, while monitoring the range of viscosities of glass metal, madeWhen polishing area is shakeout in glass metal arrival, viscosity of glass metal is 103.2~103.6Pa ﹒ S；When glass metal reaches shaping area, viscosity is102.7~103.2Pa ﹒ S, are eventually fabricated thickness for 0.7mm glass plates.
Glass plate is processed into 145mm × 73mm × 0.7mm sample, under the conditions of identical chemical tempering（400℃,4H）Progress is chemical enhanced, and each group glass sample finally obtained is carried out into falling sphere performance test and 4PB performance test methods；AndThe test of bearing stress and compressive stress layer thickness is carried out with model FSM-6000L bearing stress tester；Type is used againNumber for FVS0-2 dimension formula hardometer carry out dimension formula hardness test, test condition be load 200g.The result of the test such as institute of table 2Show.
Table 2
| Numbering | Compressive stress layer thickness | Bearing stress value | 4PB | Height of the fall ball | Dimension formula hardness |
| Embodiment 1 | 40.2μm | 805MPa | 720MPa | 40CM | 805HV |
| Embodiment 2 | 44.5μm | 865MPa | 801MPa | 50CM | 835HV |
| Embodiment 3 | 45.2μm | 872MPa | 804MPa | 55CM | 760HV |
| Embodiment 4 | 40.8μm | 805MPa | 730MPa | 40CM | 830HV |
| Embodiment 5 | 41.5μm | 826MPa | 756MPa | 40CM | 850HV |
| Embodiment 6 | 44.2μm | 870MPa | 792MPa | 55CM | 855HV |
| Embodiment 7 | 45.1μm | 880MPa | 810MPa | 55CM | 865HV |
| Embodiment 8 | 46.3μm | 890MPa | 815MPa | 60CM | 870HV |
| Embodiment 9 | 42.4μm | 851MPa | 776MPa | 45CM | 860HV |
| Embodiment 10 | 43.5μm | 864MPa | 794MPa | 45CM | 850HV |
| Embodiment 11 | 41.2μm | 835MPa | 767MPa | 45CM | 825HV |
| Embodiment 12 | 42.3μm | 845MPa | 790MPa | 45CM | 835HV |
| Compare 1 group | 12.6μm | 450MPa | 446MPa | 25CM | 254HV |
| Compare 2 groups | 20.1μm | 580MPa | 560MPa | 25CM | 400HV |
| Compare 3 groups | 17.4μm | 540MPa | 587MPa | 25CM | 365HV |
| Compare 4 groups | 20.6μm | 568MPa | 513MPa | 25CM | 388HV |
| Compare 5 groups | 19.8μm | 569MPa | 533MPa | 20CM | 345HV |
It can be seen from Table 2 that, the glass plate of each component shown in embodiment 1~12 in the present invention, its parameters value is equalHigher than control group.Stress layer depth after the high intensity protective glass plate being made up of each constituent of the invention, its chemical temperingAt least above 40 μm, it ties up formula hardness at least above 800HV under 200g load-up conditions, greatly improves the quality of glass plate,So as to effectively extend its service life.
Above-described embodiment is only the preferred embodiments of the present invention, not limiting the scope of the invention, as long as usingThe design principle of the present invention, and the change for carrying out non-creativeness work on this basis and making, all should belong to the present invention'sWithin protection domain.