Unlock instant, AI-driven research and patent intelligence for your innovation.

A glass reinforcement process that can reduce warp and size expansion

A glass strengthening and size technology, applied in glass production and other directions, can solve problems such as expansion, difficult control, and glass warpage size, and achieve the effects of convenient operation and control, reduction of glass warpage, and simple steps.

Active Publication Date: 2022-08-09
湖南晶博光电有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During low-temperature ion exchange, the compressive stress on the glass surface first increases and then decreases with the increase of the compression depth of the stress layer, which is difficult to control, and the glass will warp and expand in size during strengthening, which will affect the use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A glass strengthening process that reduces warpage and dimensional expansion, including first and second strengthening:

[0042] (1) The first strengthening: put the glass into molten salt containing low concentration potassium nitrate, and strengthen it at 375℃ for 11h;

[0043] (2) Second strengthening: put the glass after first strengthening into molten salt containing high concentration of potassium nitrate, and strengthen it at 405°C for 2.5 hours.

[0044] In the step (1), the mass percentage of sodium nitrate and potassium nitrate in the molten salt containing low concentration potassium nitrate is 50%: 50%; in the step (2), the molten salt sodium nitrate containing high concentration potassium nitrate is And the mass percentage of potassium nitrate is 0:100%.

[0045] In the step (1), the glass is aluminosilicate glass, and in weight percentage, the aluminosilicate glass includes the following components: SiO 2 : 58%, Al 2 O 3 : 16%, Na 2 O: 15%, K 2 O: 2....

Embodiment 2

[0047] A glass strengthening process that reduces warpage and dimensional expansion, including first and second strengthening:

[0048] (1) The first strengthening: put the glass into molten salt containing low concentration of potassium nitrate and strengthen it at 380℃ for 10h;

[0049] (2) Second strengthening: put the glass after first strengthening into molten salt containing high concentration of potassium nitrate, and strengthen it at 410°C for 2 hours.

[0050] In the step (1), the mass percentage of sodium nitrate and potassium nitrate in the molten salt containing low concentration potassium nitrate is 65%: 35%; in the step (2), the molten salt sodium nitrate containing high concentration potassium nitrate is And the mass percentage of potassium nitrate is 5%: 95%.

[0051] In the step (1), the glass is aluminosilicate glass, and in weight percentage, the aluminosilicate glass includes the following components: SiO 2 : 60%, Al 2 O 3 : 15%, Na 2 O: 14%, K 2 O: 2...

Embodiment 3

[0053] A glass strengthening process that reduces warpage and dimensional expansion, including first and second strengthening:

[0054] (1) The first strengthening: put the glass into molten salt containing low concentration potassium nitrate, and strengthen it at 385℃ for 9h;

[0055] (2) Second strengthening: put the glass after first strengthening into molten salt containing high concentration of potassium nitrate, and strengthen it at 415℃ for 1.5h;

[0056] In the step (1), the mass percentage of sodium nitrate and potassium nitrate in the molten salt containing low concentration potassium nitrate is 80%: 20%; in the step (2), the molten salt sodium nitrate containing high concentration potassium nitrate is And the mass percentage of potassium nitrate is 10%: 90%.

[0057] In the step (1), the glass is aluminosilicate glass, and in weight percentage, the aluminosilicate glass includes the following components: SiO 2 : 62%, Al 2 O 3 : 14%, Na 2 O: 13%, K 2 O: 1.5%, M...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of glass strengthening, in particular to a glass strengthening process capable of reducing warpage and dimensional expansion, including first strengthening and second strengthening: (1) first strengthening: placing glass in a glass containing a low concentration In the molten salt of potassium nitrate, strengthen at a temperature of 375-385 ℃ for 9-11 hours; (2) the second strengthening: put the glass after the first strengthening into the molten salt containing high concentration of potassium nitrate, at 405- Strengthening at a temperature of 415°C for 1.5-2.5h; the strengthening process of the present invention adopts a two-step method. Rapid strengthening in molten salt of potassium nitrate can obtain suitable compressive stress on glass surface, which can reduce glass warpage and avoid dimensional expansion during glass strengthening. The steps are simple and the operation control is convenient.

Description

technical field [0001] The invention relates to the technical field of glass strengthening, in particular to a glass strengthening process capable of reducing warpage and dimensional expansion. Background technique [0002] In recent years, devices such as smartphones and tablet computers have been popularized, and there is a trend of thinning and lightweight. One problem with thinning is that the strength of the glass decreases as the thickness decreases. In order to be able to meet the requirements of use, the glass used for display must have high strength even with a small thickness. To achieve this, the glass needs to be strengthened. [0003] At present, in the composition of the aluminosilicate glass used, in order to ensure the ion exchange capacity and consider the melting properties, formability, devitrification resistance and other factors of the glass, the content of alkali metal oxides is relatively high. When strengthening aluminosilicate glass, because the g...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C03C21/00
CPCC03C21/002Y02P40/57
Inventor 徐期文
Owner 湖南晶博光电有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com