Lithium-aluminum-silicon microcrystalline glass as well as strengthening method and application thereof

A glass-ceramic, lithium-aluminum-silicon technology, used in glass tempering, glass manufacturing equipment, telephone communication, etc. Effect of Surface Stress Layer Strength

Inactive Publication Date: 2021-06-08
CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, glass-ceramic has the following problems: low mechanical properties, poor impact resistance, low visible light transmittance, and scratch resistance, so it cannot meet the development requirements of mobile terminals.

Method used

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  • Lithium-aluminum-silicon microcrystalline glass as well as strengthening method and application thereof

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Embodiment Construction

[0025] 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.

[0026] Generally speaking, strengthening the glass-ceramics by chemical ion exchange can further increase its strength. At present, the strengthening of glass-ceramics is mainly a one-step ion exchange method. To obtain a larger compression depth of the stress layer, it is necessary to prolong the ion exchange process. Time or increase the exchange temperature, but too high exchange temperature and longer exchange time will lead to stress relaxation and reduce the surface compressive stress. To obtain higher surface compressive stress, it is necessary to reduce the temperature of ion exchange, but this will lead to a smaller compression depth of the stress layer, so that the surface compressive stress of ion exchange and the compression depth of the stress layer cannot be balanced.

[0027] T...

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Abstract

The invention discloses lithium-aluminum-silicon microcrystalline glass as well as a strengthening method and application thereof. The glass comprises the following components in percentage by mass: 45%-75% of SiO2, 10%-25% of Al2O3, 0-4% of ZrO2, 3%-5% of Li2O, 10%-18% of Na2O, 0-5% of K2O, 0-6% of P2O5, 0-7% of TiO2, 2%-7% of MgO, 0-10% of ZnO and 0-1% of SnO. The strengthening method comprises the following steps: preparing raw materials, and performing melting and molding to obtain mother glass; carrying out heat treatment to obtain microcrystalline glass; carrying out ion exchange on the microcrystalline glass in molten salt at the temperature of 390-500 DEG C for 3-10 hours to obtain primarily strengthened microcrystalline glass; and finally, soaking the glass ceramic subjected to primary strengthening in molten salt consisting of potassium nitrate and sodium nitrate for 1-2.5 hours to obtain the lithium-aluminum-silicon glass ceramic.

Description

technical field [0001] The invention belongs to the technical field of glass-ceramic manufacture, and specifically relates to a lithium-aluminum-silicate glass-ceramic and its strengthening method and application. Background technique [0002] The advent of the information age has put forward higher requirements for electronic display devices, such as gradual portability and wireless charging requirements. The back cover of display devices is usually made of metal materials. Metal materials will not only shield electromagnetic signals but also hinder wireless charging, which cannot meet the development needs of future electronic equipment. Glass materials can meet the electromagnetic performance requirements of display devices and are future display devices. One of the new materials for devices. Although some high-alumina glass has been applied to the back cover of mobile terminal products in the market, its surface strength and impact resistance still need to be further im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/10C03C21/00C03B27/03H04M1/02
CPCC03B27/03C03C10/0018C03C21/002H04M1/0202
Inventor 李肖妍仵小曦王晓萍王康董军
Owner CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
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