Three-dimensional microcrystalline glass and preparation method thereof

Abstract

The invention discloses three-dimensional microcrystalline glass and a preparation method thereof. The three-dimensional microcrystalline glass is prepared from the following raw materials by mass fraction based on oxide: 63-75% of SiO2; 4-10% of Al2O3; 8-11% of Li2O; 0.1-3% of Na2O; 0.1-1% of K2O; 1-5% of P2O5; and 1-6% of ZrO2. The finished glass crystal comprises 30-45% of lithium disilicate; and 30-45% of petalite. In the preparation method disclosed by the invention, by adjusting the sequence of hot bending forming treatment and micro-crystallization treatment, controlling the temperature and time in the pre-crystallization process, and putting the three-dimensional microcrystalline glass in a NaNO3 or KNO3 salt bath for ion exchange and the like, glass microcrystallization treatment is carried out to obtain planar microcrystalline glass, and then 3D curved microcrystalline glass is prepared from the planar microcrystalline glass by adopting a polishing and grinding process. The preparation process has the advantages of high yield and low process cost.

Description

technical field [0001] The invention relates to the field of glass manufacturing, in particular to a three-dimensional glass-ceramic and a preparation method thereof. Background technique [0002] Cover glass has gone through a development process from 2D to 2.5D to 3D. Compared with traditional 2.5D glass, ceramic cover and metal backplane, 3D glass has superior performance. 3D glass is expected to be widely used in 3C products such as smartphones, smart watches, tablet computers, dashboards and other wearable product screen covers and backplanes in the future. 3D glass is thin, transparent and clean, anti-fingerprint, anti-glare, and weather resistance It can not only enhance the novelty of the appearance of smart terminal products, but also bring excellent touch feel. Since smartphones have become a new generation of mobile terminal equipment, cover glass has become the standard configuration of most smartphones. In fact, the design concept and processing mode of cover g...

AI Technical Summary

Problems solved by technology

[0004] At present, because glass-ceramics has a considerable amount of crystal structure, compared with glass, its high-temperature softening effect is greatly reduced, and it has the brittleness of some ceramics, so it cannot be used for 3D hot bending process.

However, the preparation of 3D curved glass-ceramic by polishing process has complicated process, low yield and high molding cost. The existence of this problem greatly hinders the application of glass-ceramic in the field of 3D cover material.

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