Deformation-resistant high-yield-point and light zirconium boron-alumina silicate glass

Abstract

The invention relates to deformation-resistant high-yield-point and light zirconium boron-alumina silicate glass and particularly relates to alumina silicate glass containing ZrO2 and B2O3. The glass has the characteristics that the elasticity modulus E is more than or equal to 60 GPa and less than or equal to 78 GPa after the glass is chemically tempered; the yield point At is more than or equal to 620 DEG C and less than or equal to 850 DEG C; the coefficient of thermal expansion (CET) is more than or equal to 7.5*10<-6> / K and less than or equal to 9.8*10<-6> / K; the density is less than or equal to 2.5 g / cm<3>; the surface pressure stress is at least 700 MPa; and the thickness of a surface stress layer is at least 25 microns. The glass has deformation resistance, is high in yield point and is light in weight.

Description

field of invention [0001] The present invention relates to an aluminosilicate glass containing zirconium and boron which is resistant to deformation, has a high yield point temperature and is light in weight. The invention also relates to a glass product prepared by chemically tempering the zirconium boron-aluminosilicate glass. The zirconium boron-aluminosilicate glass can be used in mobile or non-mobile devices with displays, and can also be used in the field of white goods. Background of the invention [0002] Protective glass is commonly used in electronic devices, mobile electronic devices such as personal data assistants, mobile or cellular phones, watches, laptops, notebooks, digital cameras, PDAs, or as substrate glass for touch screens, televisions. For these applications, the user needs to touch the protective glass frequently, and due to the user's touch, the glass can cause problems such as surface damage, scratches and deformation. These defects will affect th...

AI Technical Summary

Problems solved by technology

High SiO 2 content makes the glass difficult to melt, high production cost, and difficult to optimize chemical toughening properties

High SiO in glass 2 The content also increases brittleness, therefore, the glass has insufficient resistance to crack growth

SiO 2 Adjustment of deformation resistance of glass with high content is also limited

The ratios between network formers and network formers and between network formers and network modifiers are not optimized to provide glasses with high resistance to deformation

In this document there is no mention of deformation resistance and yield temperature of the glass

[0015] Chinese patent application CN 200910086806 discloses the 2 aluminosilicate glass, however, the glass does not contain B 2 o 3 , the glass has high brittleness and low resistance to crack growth

However, the hardness of the glass is low, Hv2 , and the elastic modulus is also low

The glass does not contain ZrO 2 , the glass hardness is low, it is very easy to be scratched, and under such a low elastic modulus, the deformation resistance of the glass will be poor, and it will produce a large amount of deformation under the action of external force, which will affect the use

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