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Aluminosilicate glass and strengthening method thereof

A kind of aluminosilicate glass and glass technology, which is applied in the field of glass preparation, can solve the problems of reduced crack growth resistance, low glass deformation resistance, and damage to electronic components, etc., and achieves small deformation, small thermal expansion coefficient, and enhanced mechanical strength. intensity effect

Inactive Publication Date: 2020-12-01
CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
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Problems solved by technology

If E is too large, the brittleness of the glass will be greater, the glass will become too hard and less tough, and the crack growth resistance will be reduced; if E is too small, the deformation resistance of the glass will be small, and it will cause large deformation under pressure and lead to the cover protection screen Damaged inner electronic components

Method used

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  • Aluminosilicate glass and strengthening method thereof
  • Aluminosilicate glass and strengthening method thereof
  • Aluminosilicate glass and strengthening method thereof

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0032] The system and composition of the glass are the main factors that determine the strength of the glass itself, while the strength, deformation resistance and impact resistance of ordinary soda-lime glass are inferior to aluminosilicate glass. And other parameters are not as good as aluminosilicate glass, so the aluminosilicate glass system is selected and optimized on this basis to improve performance. Chemical strengthening can improve the strength of glass, using low-temperature ion exchange, that is, placing the glass in a molten salt solution (potassium and sodium salts, such as KNO at a temperature lower than the strain point of the glass) 3 、NaNO 3 ), the small ions in the glass are replaced with the large ions in the salt bath, so that the surface of the glass is in a compressed...

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Abstract

The invention relates to aluminosilicate glass and a strengthening method thereof. The glass comprises the following components in percentage by mass: 54.2%-68% of SiO2, 9.5%-20.0% of Al2O3, 9.1%-20.0% of Na2O, 3.0%-8.0% of Li2O, 0.1%-4.0% of ZrO2, 1.2%-3.6% of ZnO, 3.2%-8.0% of B2O3, 1.5%-2.5% of La2O3 and 0.1%-1% of SnO2. The preparation method comprises the following steps: melting and clarifying the raw materials and conducting molding to form plate glass; and then carrying out chemical strengthening on the plate glass twice in a salt bath, wherein primary chemical strengthening is conducted at a temperature of 350-390 DEG C for not more than 120 minutes, and secondary chemical strengthening is conducted at a temperature of 380-410 DEG C for not more than 40 minutes.

Description

technical field [0001] The invention relates to the technical field of glass preparation, in particular to an aluminosilicate glass and a strengthening method thereof. Background technique [0002] Cover glass is one of the key raw materials widely used in the flat panel display industry. It is usually a layer of glass that protects the outermost layer of the display device. It can also be used as a carrier material for the touch panel. It is mainly used in electronic equipment and mobile electronics. Devices and other mobile end markets such as mobile phones, watches, laptops, notebooks and digital cameras. Especially with the development of 5G communication and wireless charging technology and the extensive application of 3D cover and vehicle glass cover glass, higher requirements are put forward for the performance of cover glass, especially the strength, deformation resistance and impact resistance of glass performance. [0003] Generally, while considering the strengt...

Claims

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Application Information

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IPC IPC(8): C03C3/095C03C21/00
CPCC03C3/095C03C21/002
Inventor 侯文青王志安仵小曦张伟利
Owner CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
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