Strengthened microcrystalline glass with high-pressure stress layer depth and preparation method thereof

Abstract

The invention discloses strengthened microcrystalline glass with high stress layer depth and a preparation method of the strengthened microcrystalline glass. The strengthened microcrystalline glass isformed by carrying out chemical ion exchange on the microcrystalline glass in a salt bath for one time or multiple times; a pressure stress layer and a tensile stress layer corresponding to the pressure stress layer are sequentially formed on the two opposite sides of the strengthened microcrystalline glass from the surface to the interior respectively, and the depth of the single-face pressure stress layer of the strengthened microcrystalline glass is 18%-25% of the total thickness of the strengthened microcrystalline glass. The high crystallinity of the strengthened microcrystalline glass improves the intrinsic network structure strength of the strengthened microcrystalline glass, so that the microcrystalline glass can accommodate higher compressive stress, and the stress relaxation amount at high temperature is small; the exchange depth of the microcrystalline glass can be increased by adopting a lithium-containing salt bath, so that the depth of the pressure stress layer is remarkably increased; the depth of the stress layer of the strengthened microcrystalline glass accounts for more than 18% of the total thickness of the glass, and the strengthened microcrystalline glass hasvery high anti-falling strength; wide field of application.

Description

technical field [0001] The invention relates to the technical field of glass strengthening, in particular to a strengthened glass-ceramic with a high-pressure stress layer depth and a preparation method thereof. Background technique [0002] With the advent of the intelligent era, the intelligence of various products will be rapidly popularized, ranging from houses, cars, and furniture to small audio, remote controls, and drinking fountains. The screen control is the basic part of most intelligent equipment. In order to adapt to various use environments of the product, as a protective material for the screen, it is necessary to further improve its acid and alkali resistance, temperature shock resistance, mechanical shock resistance and other characteristics, and must meet Requirements for various shapes and certain transparency requirements. [0003] At present, most of the screen protection materials are glass, which has the advantages of high transmittance, good stability...

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Problems solved by technology

And due to the stress relaxation phenomenon, the stress of the deep compressive stress part is not high, which restricts the drop strength performance of lithium aluminum silicon chemically strengthened glass

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