High-hardness transparent microcrystal glass with crystal oriented array structure and preparation method of high-hardness transparent microcrystal glass

Abstract

The invention discloses high-hardness transparent microcrystal glass with a crystal oriented array structure and a preparation method of the high-hardness transparent microcrystal glass with the crystal oriented array structure. The high-hardness transparent microcrystal glass comprises base glass of an MgO-B2O3-Al2O3-SiO2 system and a cordierite crystal layer with the crystal oriented array structure, and the cordierite crystal layer with the crystal oriented array structure is formed on the surface of the base glass. By formula adjustment and process optimization, hardness, wear resistance and optical performances of the microcrystal glass are substantially improved by combination of the base glass of the MgO-B2O3-Al2O3-SiO2 system and the cordierite crystal layer, with the crystal oriented array structure, in in-situ growth on the surface of the base glass. The technical scheme is simple and feasible, extensive application to fields of electronic glass, screen glass, optical windowsand the like of wearable devices with the demand of high wear resistance, and a significant promoting effect on technical development and application in fields of optical materials and electronic glass materials is achieved.

Description

technical field [0001] The invention relates to the technical field of glass materials, in particular to a high-hardness transparent glass-ceramic suitable for the fields of electronic glass for wearable devices, screen glass, optical windows and the like with high wear resistance requirements and a preparation method thereof. Background technique [0002] Silicate glass is mainly composed of SiO 2 Such oxides are formed after high-temperature melting and cooling. Because the glass structure has the characteristics of short-range order and long-range disorder, it is impossible to arrange the internal atoms in a close-packed manner. It is much looser, which results in glass materials having a lower surface hardness and relatively poor wear resistance than crystalline or ceramic materials of the same chemical composition. In addition, from the perspective of microstructure, silicate glass is based on silicon-oxygen tetrahedron [SiO 4 ] is the three-dimensional network connec...

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Problems solved by technology

However, this type of method can only be realized in a few glass systems at present, not only requires a very strict heat treatment regime, but also takes tens of hours for nucleation and crystallization heat treatment, resulting in high cost of implementation

In addition, due to the random arrangement of the precipitated crystals in the glass-ceramics, the synergistic resistance to external scratches cannot be achieved, so the degree of improvement in the surface hardness of the transparent glass-ceramics itself is also very limited.

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