CN104628253A - Touch screen cover plate glass high in acid and alkali resistance - Google Patents
Touch screen cover plate glass high in acid and alkali resistance Download PDFInfo
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- CN104628253A CN104628253A CN201410167675.5A CN201410167675A CN104628253A CN 104628253 A CN104628253 A CN 104628253A CN 201410167675 A CN201410167675 A CN 201410167675A CN 104628253 A CN104628253 A CN 104628253A
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- glass
- screen cover
- plate glass
- touch
- touch screen
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Abstract
The invention provides a touch screen cover plate glass high in acid and alkali resistance and aims at solving the technical problems of poor acid and alkali resistance of the existing touch screen cover plate glass in the chemical enhancement process. The adopted technical scheme is as follows: the glass is composed of the following components in percentage by weight: 55-67% of SiO2, 16-24% of Al2O3, 13-18% of Na2O, 0.1-4% of ZnO and 0.1-1% of TiO2. The touch screen cover plate glass has excellent acid and alkali resistance, and is suitable for chemical enhancement treatment; the enhanced glass is high in surface hardness.
Description
Technical field
The invention belongs to field of glass production technology, relate to the screen protection glass material of display product, particularly a kind of adopt chemical enhanced after there is the touch-screen cover-plate glass of higher resistance to acids and bases, excellent mechanical property.
Background technology
In order to effectively reduce touch-control module cost; meet the lightening market trend of terminal consumption electronic product simultaneously; touch-control dealer develop actively OGS touch screen technology since 2011; OGS technology integrates touch screen and protective glass exactly, and protective glass is directly formed a kind of technology of ITO conducting film and sensor.One block of glass plays the dual function of protective glass and touch sensor simultaneously.From technological layer, OGS technology has following advantage than the G/G touch technology of main flow: structure is simple, light, thin, light transmission is good, improves display effect, owing to saving a slice glass substrate and bonding process, reduce production cost and improve conforming product rate.As sky hornet 1 generation, Gionee elegance and talent, millet 2 all have employed OGS technology in current domestic mobile phone brand manufacturers.But OGS technology is still faced with glass reinforced and problem that is production efficiency.Because OGS protective glass and touch-screen integrate; usually need first to strengthen; then plated film, etching; finally cut; and cover-plate glass needs through attack solution etching repeatedly with the requirement meeting follow-up making circuit in the course of processing, and therefore cover-plate glass needs to have good resistance to acids and bases.
Summary of the invention
The present invention solves the existing touch-screen cover-plate glass technical problem that acid-proof alkaline is poor in chemical enhanced process, devise the touch-screen cover-plate glass that a kind of resistance to acids and bases is strong, after chemical intensification treatment, improve the resistance to acids and bases of glass and the surface hardness of glass.
The present invention is the technical scheme realizing goal of the invention employing, the touch-screen cover-plate glass that a kind of resistance to acids and bases is strong, and key is: in described glass component, each composition counts by weight percentage respectively:
SiO
2 55-67%，
Al
2O
3 16-24%，
Na
2O 13-18%，
ZnO 0.1-4%，
TiO
2 0.1-1%。
The invention solves the technical problem of touch-screen cover-plate glass acid-proof alkaline difference, the gordian technique main points solved this technical problem are: (1) the present invention introduces the ZnO of 0.1-4%, Zn works to around silicon-oxy tetrahedron the effect of gathering, strengthen network structure, improve glass acid resistance, improve glass chemistry toughening intensity simultaneously, increase ion-exchange speed and the degree of depth.(2) the present invention introduces the Al of 16-24%
2o
3, the non-bridging oxygen that basic metal is introduced and Al
3+form aluminum-oxygen tetrahedron, this volume ratio silicon-oxy tetrahedron large, in glass structure, produce larger gap, be conducive to ion-exchange, finally make chemical enhanced better effects if.(3) the present invention introduces the TiO of 0.1-1%
2, reduce the temperature of fusion of glass, TiO
2with [TiO
4] form enters network structure, it makes [TiO
4/2] and [SiO
4/2] form the mixed matrix of titanosilicate, improve the alkali resistance of glass.(4) utilize the glass of system of the present invention melting, KNO
3in (400 DEG C-450 DEG C) solution, the chemical enhanced time is 4-7 hour, and ion exchange depth is greater than 40 μm, and glass surface stress at least can reach 930MPa within a short period of time.
Embodiment
The touch-screen cover-plate glass that resistance to acids and bases is strong, in described glass component, each composition counts by weight percentage respectively:
SiO
2 55-67%，
Al
2O
3 16-24%，
Na
2O 13-18%，
ZnO 0.1-4%，
TiO
2 0.1-1%。
Described SiO
2content is preferably 60-63%.
Described Al
2o
3content is preferably 18-22%.
Described Na
2o content is preferably 14-17%.
Described ZnO content is preferably 0.5-3.5%.
Described TiO
2content is preferably 0.5-0.8%.
SiO
2the composition forming glass skeleton, SiO
2content is higher, and chemical resistant properties and physical strength can increase, and the high temperature viscosity of glass increases, SiO
2too much, be just difficult to obtain the long glass of material property.SiO
2content is lower not easily forms glass, and strain point declines, and the coefficient of expansion increases, and acid resistance declines, and alkali resistance declines.Consider temperature of fusion, crystallization ceiling temperature, glass expansion coefficient physical strength.SiO
2content selects 55-67wt%, and more preferably scope is at 60-63wt%.
Al
2o
3chemical durability of glass can be improved and reduce devitrification of glass tendency, improve the composition of modulus in tension simultaneously.Al
2o
3content is too much, and glass is difficult to found, material property is short, Al
2o
3content is lower, the easy crystallization of glass, physical strength is lower be unfavorable for shaping.The present invention introduces the Al of 16-24wt%
2o
3, improve strain point, intensity, chemical enhanced characteristic.Preferred Al
2o
3content is 18-22wt%.
Na
2o belongs to network outer body, fluxing action, and glass melting temperature is reduced.Na
2o can reduce glass viscosity, improves chemical durability of glass, Na
2o content selects 13-18wt%.Consider follow-up tempering, Na
2the preferred 14-17wt% of O content.
ZnO is transition metal, is in cyberspace, works to around silicon-oxy tetrahedron the effect of gathering, and strengthens network structure, improves strain point of glass chemical stability, improves glass chemistry toughening intensity simultaneously, increases ion-exchange speed and the degree of depth.So the present invention have chosen 0.1-4wt%ZnO, preferred 0.5-3.5wt%ZnO.
TiO
2be a kind of network intermediate, the temperature of fusion of glass can be reduced, TiO
2with [TiO
4] form enters network structure, it makes [TiO
4/2] and [SiO
4/2] form the mixed matrix of titanosilicate, improve the alkali resistance of glass, but introduction volume can not be too high, glass easily damages or easily phase-splitting.So the present invention have chosen 0.1-1wt%ZnO, preferred 0.5-0.8wt%ZnO.
Invent when implementing, test sample preparation steps is: weighing-mixing-melting-stirring-homogenizing-shaping-annealing-processing-performance test.
Concrete steps: weigh each component according to formula, fully mix, make it even, are poured into by compound in crucible, be incubated 8-12h under High Temperature Furnaces Heating Apparatus at 1550-1650 DEG C.In order to make glass ingredient even, platinum rod under high temperature, is used to stir.The glass metal melted is cooled to shaping required temperature range.
By the glass cutting after annealing, grind, be polished to thin slice needed for experiment, put into the melting KNO of 400-450 DEG C
3carry out chemical tempering process in solution, take out after tempering 4-7h and be cooled to room temperature, dry with washed with de-ionized water glass flake.
The test of embodiment Midst density adopts Archimedes method to measure, and unit is g/cm
3.Expansion coefficient of glass thread, application dilatometric method, this method is placed on silica glass frame by sample, and utilize glass different from the thermal expansivity of silica glass, both mensuration is relative elongation in heat-processed.Characterize glass in the unit length of room temperature to 300 DEG C and the increment of unit length.
Strain point and annealing point, softening temperature all adopt fiber elongation method to measure, strain point, annealing point are with reference to ASTMC-338, the lower limit temperature that glass carries out anneal is strain point temperature, and the following inside glass stress relieved of strain point becomes very slow, can carry out fast cooling.Annealing is a kind of heat treatment process, can make the permissible value that the thermal stresses existed in glass is eliminated as far as possible or reduced.Softening temperature is that diameter heats according to 5 DEG C/min speed at the glass yarn of 0.65mm-0.1mm length at 230mm in process furnace, and temperature when elongation is 1mm/min is softening point temperature, and it characterizes the softening unique point of glass in deadweight state.
Chemical stability is tested: sheet glass places 24h respectively in the 5%HCI of 95 DEG C; 20 min are placed in the 10%HF solution of 20 DEG C; Glass loss amount characterizes the acid resistance of glass.Prevent 6 h in the 5%NaOH solution of sheet glass 95 DEG C, glass loss amount characterizes the alkali resistance of glass.
Specific embodiment and performance test analysis thereof that each component in formula measures by weight percentage is given below in table 1 and table 2:
Table 1:
Table 2:
Claims (6)
1. the touch-screen cover-plate glass that resistance to acids and bases is strong, is characterized in that: in described glass component, each composition counts by weight percentage respectively:
SiO
2 55-67%，
Al
2O
3 16-24%，
Na
2O 13-18%，
ZnO 0.1-4%，
TiO
2 0.1-1%。
2. the touch-screen cover-plate glass that a kind of resistance to acids and bases according to claim 1 is strong, is characterized in that: described SiO
2content is preferably 60-63%.
3. the touch-screen cover-plate glass that a kind of resistance to acids and bases according to claim 1 is strong, is characterized in that: described Al
2o
3content is preferably 18-22%.
4. the touch-screen cover-plate glass that a kind of resistance to acids and bases according to claim 1 is strong, is characterized in that: described Na
2o content is preferably 14-17%.
5. the touch-screen cover-plate glass that a kind of resistance to acids and bases according to claim 1 is strong, is characterized in that: described ZnO content is preferably 0.5-3.5%.
6. the touch-screen cover-plate glass that a kind of resistance to acids and bases according to claim 1 is strong, is characterized in that: described TiO
2content is preferably 0.5-0.8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410167675.5A CN104628253A (en) | 2014-04-24 | 2014-04-24 | Touch screen cover plate glass high in acid and alkali resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410167675.5A CN104628253A (en) | 2014-04-24 | 2014-04-24 | Touch screen cover plate glass high in acid and alkali resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104628253A true CN104628253A (en) | 2015-05-20 |
Family
ID=53207558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410167675.5A Pending CN104628253A (en) | 2014-04-24 | 2014-04-24 | Touch screen cover plate glass high in acid and alkali resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104628253A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333318A (en) * | 2020-03-05 | 2020-06-26 | 江苏骏益光电科技有限公司 | Glass composition for cover plate and preparation method of cover plate glass |
| CN113039163A (en) * | 2018-11-14 | 2021-06-25 | Ａｇｃ株式会社 | Glass substrate for high-frequency device, liquid crystal antenna, and high-frequency device |
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| CN1886348A (en) * | 2003-10-24 | 2006-12-27 | Ppg工业俄亥俄公司 | Lithia-alumina-silica containing glass compositions and glasses suitable for chemical tempering and articles made using the chemically tempered glass |
| CN102092940A (en) * | 2009-12-11 | 2011-06-15 | 肖特公开股份有限公司 | Aluminum silicate glass for touch screen |
| US20110165380A1 (en) * | 2010-01-07 | 2011-07-07 | Kevin Thomas Gahagan | Cover assembly for electronic display devices |
| CN102336521A (en) * | 2011-06-14 | 2012-02-01 | 吴艺菲 | Aluminum silicate glass and preparation method thereof |
| CN102701586A (en) * | 2012-04-01 | 2012-10-03 | 东旭集团有限公司 | Formula of light cover board glass for touch screen |
-
2014
- 2014-04-24 CN CN201410167675.5A patent/CN104628253A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| CN1886348A (en) * | 2003-10-24 | 2006-12-27 | Ppg工业俄亥俄公司 | Lithia-alumina-silica containing glass compositions and glasses suitable for chemical tempering and articles made using the chemically tempered glass |
| CN102092940A (en) * | 2009-12-11 | 2011-06-15 | 肖特公开股份有限公司 | Aluminum silicate glass for touch screen |
| US20110165380A1 (en) * | 2010-01-07 | 2011-07-07 | Kevin Thomas Gahagan | Cover assembly for electronic display devices |
| CN102336521A (en) * | 2011-06-14 | 2012-02-01 | 吴艺菲 | Aluminum silicate glass and preparation method thereof |
| CN102701586A (en) * | 2012-04-01 | 2012-10-03 | 东旭集团有限公司 | Formula of light cover board glass for touch screen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113039163A (en) * | 2018-11-14 | 2021-06-25 | Ａｇｃ株式会社 | Glass substrate for high-frequency device, liquid crystal antenna, and high-frequency device |
| CN111333318A (en) * | 2020-03-05 | 2020-06-26 | 江苏骏益光电科技有限公司 | Glass composition for cover plate and preparation method of cover plate glass |
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Application publication date: 20150520 |
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