Glass cover plate with hardness and toughness and preparation method thereof

By using a gradient layered component structure and secondary ion exchange technology, the hardness and toughness of the glass cover are improved, resolving the contradiction between hardness and toughness. This achieves a balance of high hardness, high toughness, oleophobicity, and antistatic properties, making it suitable for mass production and mid-to-high-end mobile phone applications.

CN122145010APending Publication Date: 2026-06-05SHANDONG SALU OPTICAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610211196.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-13
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing glass covers cannot achieve a balance between hardness and toughness, making them prone to scratches or breakage during daily use. They cannot meet users' dual needs for scratch and drop resistance in long-term use, and their production costs are high and mass production is difficult.

Method used

The glass substrate adopts a gradient layered component structure, including a surface layer, a transition layer and a core layer. Combined with a biomimetic composite coating, the hardness and toughness of the glass are improved through a layered casting process and a secondary ion exchange technology, and it remains stable in high temperature and high humidity environments.

Benefits of technology

It achieves a Mohs hardness of ≥8.5 for glass, improves impact resistance by 60%, increases edge stress by 50%, reduces production costs by 40-50%, is suitable for mass production, is compatible with curved screen designs, has oleophobic and antistatic properties, and is stable in long-term use.

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Abstract

The invention discloses a glass cover plate giving consideration to hardness and toughness and a preparation method thereof.The glass base material of the glass cover plate is of a gradient layered component structure and sequentially comprises a surface layer, a transition layer and a core layer, all the layers have the same specific component, and the component content of the same component has the gradient characteristic; and meanwhile, each layer also has relatively different components, so that the hardness and the toughness of the glass cover plate can be considered. In the preparation process, through a secondary ion exchange process, the stress layer depth reaches 100-120 microns, the edge stress is improved by 50% or more, the problems of edge embrittlement and easy breakage of traditional glass can be solved, the design requirements of curved screens and special-shaped screens can be met at the same time, mass production is feasible, the cost is controllable, the overall cost is reduced by 40-50% compared with that of microcrystalline glass, and the mass production yield can reach 85% or more; various functions of high hardness, high toughness, oleophobicity, static electricity resistance, stress relaxation resistance and the like can be synchronously realized.
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