A spinel glass-ceramic, chemically strengthened glass-ceramic and applications thereof

By adjusting the composition and heat treatment process of spinel microcrystalline glass and combining chemical strengthening treatment, the problem of insufficient impact and drop resistance of spinel microcrystalline glass in the prior art is solved, high intrinsic strength and excellent stress characteristics are achieved, and the preparation cost is reduced.

CN118270985BActive Publication Date: 2025-04-04CHONGQING AUREAVIA HI TECH GLASS CO LTD
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Patent Information

Application Number
CN202310389939.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-12
Publication Date
2025-04-04
Estimated Expiration
2043-04-12

AI Technical Summary

Technical Problem

The prior art is difficult to obtain spinel microcrystalline glass with high stress layer depth and excellent deep stress characteristics, resulting in insufficient impact and drop resistance.

Method used

By adjusting the composition of spinel microcrystalline glass, optimizing the amount of oxides, combined with heat treatment technology, spinel microcrystalline glass with specific structure and high intrinsic strength is prepared, and excellent surface stress characteristics and deep stress characteristics are obtained through chemical strengthening treatment.

Benefits of technology

The high intrinsic strength and excellent anti-fall impact performance of spinel microcrystalline glass are achieved, reducing the preparation cost and avoiding the use of high-cost lithium ions.

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Abstract

The present invention provides a spinel glass-ceramic, a chemically strengthened glass-ceramic and an application thereof. The spinel glass-ceramic comprises a main crystalline phase (Zn, Mg)Al2O4; the average transmittance of the spinel glass-ceramic with a thickness of 0.7 mm in a visible light range is less than or equal to 70.00%; the composition of the spinel glass-ceramic, expressed in molar percentage of oxides, comprises: SiO2 38.00 mol% to 48.30 mol%, Al2O3 25.50 mol% to 30.00 mol%, MgO 5.00 mol% to 8.00 mol%, ZnO 8.00 mol% to 14.00 mol%, ZrO2 3.00 mol% to 5.00 mol%, Na2O 7.20 mol% to 14.00 mol%, K2O 0.00 mol% to 2.00 mol%, B2O3 3.00 mol% to 8.00 mol%, Y2O3 0.00mol%~1.00mol%, BaO0.00mol%~2.10mol%; the composition of the spinel glass-ceramic does not include Li2O. The spinel glass-ceramic provided by the present invention has high intrinsic strength, and can be chemically strengthened to obtain chemically strengthened glass-ceramic with excellent drop impact resistance, which can meet the use requirements of electronic equipment protective glass. The spinel glass-ceramic provided by the present invention does not require the use of expensive lithium, and has better economic benefits compared to the existing lithium-containing spinel glass-ceramic.
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