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Chemically-reinforced cover plate glass, and preparation method thereof

A cover glass and chemical technology, which is applied in the field of chemically strengthened cover glass and its preparation, can solve the problems of fewer production processes, inability to adapt to the requirements of use scenarios, and low density

Inactive Publication Date: 2018-04-20
DONGXU OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the popularization of these electronic devices with touch devices, the requirements for the wear resistance of touch devices are also increasing. The traditional method of surface coating can no longer meet the needs of fewer production processes, lower costs and longer service life. requirements
The performance of the chemically toughened glass cover has been greatly improved. It has a low density and is portable. However, the surface stress of the existing glass after chemical toughening is not high enough to meet the requirements of various use scenarios.

Method used

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  • Chemically-reinforced cover plate glass, and preparation method thereof
  • Chemically-reinforced cover plate glass, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The method for preparing a chemically strengthened cover glass of the present disclosure limits the specific components and content range of the glass composition, and adopts a chemical strengthening process, so that the chemically strengthened cover glass prepared by the method has a higher surface stress And the larger thickness of the stress layer improves the surface scratch resistance of the chemically strengthened glass substrate, making it resistant to external forces such as dropping and abrasion, and the chemically strengthened cover glass has strong alkali resistance.

[0025] According to the present disclosure, SiO 2 It is an essential component of the glass skeleton, which can improve the degree of glass network connection, chemical resistance and mechanical strength of the glass. If the content is too high, it will increase the high-temperature viscosity of the glass and make it difficult to melt the glass. Therefore, the suitable SiO in this disclosure 2 ...

Embodiment 1

[0043] The components and contents of the glass composition used to prepare the cover glass in this example are shown in Table 1. Weigh the glass composition according to the weight and mix it well, melt it into molten glass in a furnace at 1550-1650°C, keep it warm for 8 hours, cool down the molten glass to the temperature required for molding, and place it in a tin bath Inner molding, heat preservation at 630°C for 1 hour for annealing treatment, to obtain cover glass, test the density, expansion coefficient, strain point, annealing point, softening point and alkali-resistant surface weight loss rate of the cover glass, the test results are listed in Table 1;

[0044] Among them, the density test is determined by the Archimedes method, and the unit is g / cm 3 ; The coefficient of linear thermal expansion is measured by a horizontal dilatometer, and the coefficient of linear thermal expansion (CTE) in the range of 50 to 350 °C is measured by ×10 -7 / °C said.

[0045] Put the...

Embodiment 2～22 and comparative example 1～4

[0047]Examples 2-22 and Comparative Examples 1-4 respectively adopt the preparation method of Example 1, the difference is that the components and contents of the glass composition used to prepare the chemically strengthened cover glass are shown in Table 1 and Table 2 respectively Shown, the test results are listed in Table 1 and Table 2.

[0048] Table 1

[0049]

[0050] Table 2

[0051]

[0052] According to the data in Table 1 and Table 2, the comparison between Examples 1-22 and Comparative Example 1 shows that compared to SiO 2 +Al 2 o 3 The chemically strengthened cover glass prepared by the glass composition whose content range is different from the scope of the present disclosure, the chemically strengthened cover glass prepared by the method of the present disclosure has a large stress layer thickness and high surface stress; Examples 1-22 and From the comparison of Comparative Example 2, it can be seen that, compared with the chemically strengthened cover...

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Abstract

The invention relates to a chemically-reinforced cover plate glass, and a preparation method thereof. According to the preparation method, under heating conditions, a glass composition is subjected tomelting homogenizing, moulding, and annealing so as to obtain cover plate glass; the cover plate glass is dipped into a molten salt containing potassium ions for ion exchange so as to obtain the chemically-reinforced cover plate glass. The surface compressive stress of the chemically-reinforced cover plate glass ranges from 770 to 860MPa, and the compressive stress layer thickness ranges from 36to 50<mu>m; the chemically-reinforced cover plate glass is subjected to boiling in a 1mol / L NaOH solution for 10h, glass surface weight loss ratio is equal to or lower than 3.56wt%. According to the preparation method, the specific composition and the weight range of the glass composition are limited, chemical reinforcing technology is adopted, so that the obtained chemically-reinforced cover plate glass is relatively high in surface stress and stress layer thickness, the surface scratch-proofness of glass substrate obtained via chemical tempering is improved, dropping resistance and wear resistance are improved, and the alkali resistance is excellent.

Description

technical field [0001] The present disclosure relates to the field of glass manufacturing, in particular, to a chemically strengthened cover glass and a preparation method thereof. Background technique [0002] Cover glass is mainly used in the outermost layer of the touch screen, also known as strengthened optical glass, glass window, strengthened mobile phone lens, etc. The main raw material of the product is ultra-thin flat glass. After cutting, CNC engraving, thinning, strengthening, coating, printing and other processes, it has the functions of impact resistance, scratch resistance, oil resistance, fingerprint resistance, and enhanced light transmittance. . After the cover glass is attached to the outer layer of the touch screen, it can protect the touch screen on the one hand, and can print different colors, patterns, and markers on the other hand to decorate and beautify the product. Since entering the touch era marked by Apple products, capacitive touch screen solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/085C03C3/087C03C21/00
CPCC03C3/085C03C3/087C03C21/002
Inventor 郭锋李青宫汝华李德宝王忠华彭飞沈子涵
Owner DONGXU OPTOELECTRONICS TECH CO LTD
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