CN103990445A - Ion exchange catalyst for toughening of novel ultrathin integrated touch screen and application method thereof - Google Patents
Ion exchange catalyst for toughening of novel ultrathin integrated touch screen and application method thereof Download PDFInfo
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- CN103990445A CN103990445A CN201410201769.XA CN201410201769A CN103990445A CN 103990445 A CN103990445 A CN 103990445A CN 201410201769 A CN201410201769 A CN 201410201769A CN 103990445 A CN103990445 A CN 103990445A
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Abstract
The invention provides an ion exchange catalyst for toughening of a novel ultrathin integrated touch screen and an application method thereof. The ion exchange catalyst comprises the following raw materials by weight: 1 to 2 parts of KOH, 2 to 4 parts of Al2O3 and 10 to 15 parts of diatomite. The application method comprises the following steps: adding the ion exchange catalyst into potassium nitrate molten salt, heating potassium nitrate mixed molten salt to 400 to 500 DEG C, carrying out stirring and then carrying out standing; and immersing glass in the potassium nitrate mixed molten salt with a temperature of 400 to 500 DEG C for toughening for 3 to 6 h. The invention has the following advantages: after usage of the catalyst, the concentration of sodium ions in the potassium nitrate mixed molten salt is increased from original 4000 mu g/g (measured at 400 DEG C) to 7500 mu g/g (measured at 400 DEG C); conversion efficiency of potassium and sodium ions is improved by more than 30%. After improvement, a 2.5-D curved touch screen has substantially improved glass performance, greatly shortened toughening time and an accordingly decreased warping degree.
Description
Technical field
The present invention relates to the ion-exchange catalyst of touch-screen steel process.
Background technology
At present, safety glass (or claiming ion-exchange reinforcing glass) is according to the diffusion mechanism of ion, to change glass surface to form, the metal ion that is surface layer of glass is replaced by metal ions different in fused salt, makes glass surface form a kind for the treatment of process of compressive stress layer.Glass is immersed after potassium nitrate fused salt, sodium ion in glass and the potassium ion in liquation produce ion-exchange, because potassium ion is larger than sodium ion diameter, potassium ion instead of sodium ion, make glass surface produce extruding, expand, thereby glass surface produces stress, the service life of reinforcing glass impact resistance, compressive resistance and glass.
Because ultra-thin monolithic integrated touch screen thickness is very thin, conventionally adopt the former material of 0.55 ~ 1.0mm thickness, the stress that after tempering, its positive and negative produces because of ion-exchange very easily makes the slight distortion of touch-screen, greatly increase difficulty and the efficiency of ultra-thin monolithic integrated touch screen laminating, become the industry bottleneck of the ultra-thin monolithic integrated touch screen development of restriction.
Summary of the invention
Object of the present invention is exactly very easily to make the slight distortion of touch-screen for the stress that after current above-mentioned tempering, its positive and negative produces because of ion-exchange, greatly increase difficulty and the efficiency of ultra-thin monolithic integrated touch screen laminating, become the deficiency of the industry bottleneck of the ultra-thin monolithic integrated touch screen development of restriction, and provide the stress that its positive and negative produces because of ion-exchange after tempering very easily to make the slight distortion of touch-screen, greatly increase difficulty and the efficiency of ultra-thin monolithic integrated touch screen laminating, become the industry bottleneck of the ultra-thin monolithic integrated touch screen development of restriction.
The ion-exchange catalyst of touching screen steel process, raw material weight distribution ratio is: KOH 1 ~ 2 Al O 2 ~ 4 diatomite 10 ~ 15.
It also has B O, ZrO or/and Na O, and weight distribution ratio is:
KOH 1 ~ 2 Al O 2 ~ 4 diatomite 10 ~ 15
B?O 0~1 ZrO 0~1 Na?O 0~1。
Optimum feed stock weight distribution ratio is:
KOH 1.3 Al O 2.4 diatomite 12.1
B?O 0.8 ZrO 0.6 Na?O?0.6。
Its using method is:
A, ion-exchange catalyst is added in potassium nitrate fused salt, its weight portion proportioning is:
Ion-exchange catalyst 1, potassium nitrate fused salt 200
Make potassium nitrate fused salt mixt;
B, potassium nitrate fused salt mixt is heated to 400-500 ℃, stirs and standing, time of repose?
C, glass is immersed to tempering in 400-500 ℃ of potassium nitrate fused salt mixt, tempering time 3 ~ 6H.
Advantage of the present invention is: this catalyst is after use, and in potassium nitrate fused salt, Na ion concentration is increased to 7500ug/g (400 ℃ of measurements) from original 4000ug/g (400 ℃ of measurements).Potassium, sodium ion transformation efficiency promote and surpass 30%.After improving, 2.5D cambered surface touch-screen glass properties promotes greatly, and the tempering time significantly shortens, and angularity is corresponding reducing also, this for breaking industry bottleneck, enterprise competitiveness is significant.
The specific embodiment
Get KOH 1.3kg, Al O 2.4 kg, diatomite 12.1 kg,
B O 0.8 kg, ZrO 0.6 kg, Na O 0.6 kg mix and are this catalyst.
Its using method is:
A, ion-exchange catalyst is added in potassium nitrate fused salt, its weight portion proportioning is:
Ion-exchange catalyst 1 potassium nitrate fused salt 200
Make potassium nitrate fused salt mixt;
B, potassium nitrate fused salt mixt is heated to 4500 ℃, stirs and standing,
C, glass is immersed to tempering in 400-500 ℃ of potassium nitrate fused salt mixt, tempering time 5H.
Reaction mechanism:
Take active material potassium hydroxide, alundum (Al2O3) and fining agent diatomite is that main ion-exchange catalyst can accelerate K+, N+ ion-exchange.Al2O3 plays acceleration in ion exchange process, and its reason is that Al2O3 replaces after SiO2, and volume increases.The molecular volume of ［ AlO4 ］ is 41cm/mol, and the molecular volume of ［ SiO4 ］ is 27.24cm/mol, with Al2O3, replaces after SiO2, and molecular volume increases, and structural network space expands, and is conducive to basic ion diffusion; On the other hand, volume increases, and is also conducive to absorb the potassium ion of large volume, promotes ion-exchange.
From the practical viewpoint of ion-exchange, it is very important can obtaining in the short period of time the ion-exchange layer thickness that meets requirement of strength, generally uses the glass that exchange velocity is fast, stress relaxation is little to form, and system is composed as follows:
SiO2?-RO-R2O
SiO2?-Al2O3?-R2O
SiO2?-Al2O3?-RO（MgO、CaO、SrO、ZnO、BaO、PbO）-?R2O
SiO2?-Al2O3?-B2O3-RO-?R2O
SiO2?-Al2O3?-RO-RO2（ZrO2、TiO2、CeO2）-R2O
2.～5. in the composition of system, when SiO2 content is less than 50%, the chemically stable of glass
Property is poor; Content is 65% when above, and while producing glass, raw material is difficult to fusing.General SiO2 content is advisable with 60%～65%.For the glass of heterogeneity, ion-exchange catalyst can also be introduced B2O3, ZrO2, Na2O etc. on Al2O3, KOH and diatomite basis.B2O3 and Al2O3 use, the strengthening layer thickness of ion-exchange increases, and intensity improves.Borosilicate glass carries out after ion-exchange, strengthening bed thickness 20～40um, and surface stress reaches 500～600 MPa, than high 10～20 times before processing.ZrO2 and Al2O3 use, strengthening effect is relatively good.After exchanging with the glass ion that contains TiO2 composition, intensity obviously increases, and as the glass containing TiO2 25.2%, ion-exchange rear surface stress can reach 710 MPa.Alkali metal oxide content has a significant impact ion-exchange.Na2O content increases, the corresponding increase of still layer, but Na2O content reaches 15% when above, chemical stability decline.
Ion exchange capacity between molten salt bath and glass, can calculate with following formula:
In formula: the diffusing capacity of M-ion; The content of Na2O in C0-glass basis; T-ion-exchange time.The position that potassium ion is diffused into inside glass sodium ion in molten salt bath need to consume the energy of △ Es:
In formula: △ Es-strain energy; The coefficient of rigidity of G-glass; RNa+-sodium ion radius; RK+-potassium ion radius.
Above-mentioned energy is the needed energy in position that potassium ion is squeezed into sodium ion, also can be described as the needed energy of radius that the hole radius that expands sodium ion adapts to potassium ion, and this kind of energy is that the thermal power transfer that is heated rear acquisition by molten salt bath forms.Suppose that in glass, the electrostatic interaction between the position of sodium ion and the position of potassium ion equates, so in the glass that contains sodium ion and potassium ion, potassium ion activation energy after repeatedly spreading reduces gradually, last potassium ion is after entering to surface layer of glass certain depth, rest on the position of sodium ion, no longer transition, ion exchange process finishes.
Claims (4)
1. new type superthin integrated touch screen tempering ion-exchange catalyst, is characterized in that raw material weight distribution ratio is: KOH 1 ~ 2 Al O 2 ~ 4 diatomite 10 ~ 15.
2. according to the ion-exchange catalyst of the high-strength tempering touch-screen of production described in right 1, it is characterized in that it also has B O, ZrO or/and Na O, raw material weight distribution ratio is:
KOH 1 ~ 2 Al O 2 ~ 4 diatomite 10 ~ 15
B?O 0~1 ZrO 0~1 Na?O 0~1。
3. according to the ion-exchange catalyst of the high-strength tempering touch-screen of production described in right 2, it is characterized in that optimum feed stock weight distribution ratio is:
KOH 1.3 Al O 2.4 diatomite 12.1
B?O 0.8 ZrO 0.6 Na?O?0.6。
4. according to the ion-exchange catalyst for touch-screen steel process described in right 1,2 or 3, it is characterized in that its using method is:
A, ion-exchange catalyst is added in potassium nitrate fused salt, its weight portion proportioning is:
Ion-exchange catalyst 1 potassium nitrate fused salt 200
Make potassium nitrate fused salt mixt;
B, potassium nitrate fused salt mixt is heated to 400-500 ℃, stirs and standing;
C, glass is immersed to tempering in 400-500 ℃ of potassium nitrate fused salt mixt, tempering time 3 ~ 6H.
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| CN201410201769.XA CN103990445B (en) | 2014-05-14 | 2014-05-14 | Ultra-thin integrated touch screen tempering ion-exchange catalyst and using method |
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| CN201410201769.XA CN103990445B (en) | 2014-05-14 | 2014-05-14 | Ultra-thin integrated touch screen tempering ion-exchange catalyst and using method |
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| CN103990445B CN103990445B (en) | 2017-04-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104743867A (en) * | 2015-03-20 | 2015-07-01 | 武汉理工大学 | Method for preparing mechanically-sensitive glass by two-step isothermal ion exchange |
| CN104759276A (en) * | 2015-03-16 | 2015-07-08 | 汕头市拓捷科技有限公司 | Catalyst in touch-controllable glass tempering technology |
| CN104761133A (en) * | 2015-03-16 | 2015-07-08 | 汕头市拓捷科技有限公司 | Touch-controllable glass tempering technology |
| CN105621898A (en) * | 2016-01-12 | 2016-06-01 | 上海斐讯数据通信技术有限公司 | Processing method of protective glass of display screen, protective glass and display screen |
| CN110540367A (en) * | 2018-06-15 | 2019-12-06 | 蓝思科技（长沙）有限公司 | Toughened glass molten salt and treatment method of toughened glass |
| CN110963715A (en) * | 2019-12-27 | 2020-04-07 | 深圳市惠乐光电有限公司 | Chemical strengthening method for flexible ultrathin glass cover plate |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759276A (en) * | 2015-03-16 | 2015-07-08 | 汕头市拓捷科技有限公司 | Catalyst in touch-controllable glass tempering technology |
| CN104761133A (en) * | 2015-03-16 | 2015-07-08 | 汕头市拓捷科技有限公司 | Touch-controllable glass tempering technology |
| CN104759276B (en) * | 2015-03-16 | 2017-06-20 | 广东拓捷科技股份有限公司 | Can touch-control glass steel process catalyst |
| CN104743867A (en) * | 2015-03-20 | 2015-07-01 | 武汉理工大学 | Method for preparing mechanically-sensitive glass by two-step isothermal ion exchange |
| CN105621898A (en) * | 2016-01-12 | 2016-06-01 | 上海斐讯数据通信技术有限公司 | Processing method of protective glass of display screen, protective glass and display screen |
| CN110540367A (en) * | 2018-06-15 | 2019-12-06 | 蓝思科技（长沙）有限公司 | Toughened glass molten salt and treatment method of toughened glass |
| CN110540367B (en) * | 2018-06-15 | 2022-02-08 | 蓝思科技（长沙）有限公司 | Toughened glass molten salt and treatment method of toughened glass |
| CN110963715A (en) * | 2019-12-27 | 2020-04-07 | 深圳市惠乐光电有限公司 | Chemical strengthening method for flexible ultrathin glass cover plate |
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Effective date of registration: 20160627 Address after: 448001 Xiangshan Road, Dongbao District, Hubei, No. 43, No. Applicant after: Pei Shunyao Address before: 448124 No. 9, Longjing Avenue, hi tech Zone, Hubei, Jingmen Applicant before: Hubei Zhi Zhan optics Science and Technology Ltd. |
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Effective date of registration: 20191112 Address after: 314000 No.7, pailouxia, Lishun village, Chongfu Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee after: Jiaxing worui Technology Co., Ltd Address before: 448001 No. 43, Xiangshan Avenue, Dongbao District, Hubei, Jingmen Patentee before: Pei Shunyao |