Glass ceramics

Abstract

The invention discloses glass ceramics. The glass ceramics is prepared from the following components, in percentage by weight: 65-80% of SiO2, 0-3.5% of Al2O3, 7-12.5% of Li2O, 0.5-3% of K2O, greaterthan or equal to 3% and less than or equal to 10% of Y2O3, 1.5-4% of P2O5, 1-5% of ZrO2, 0.5-2% of MgO and 0.5-2% of ZnO. The glass ceramics solve problem of molding and opalescence presenting of theglass ceramics which take a quartz solid solution and lithium disilicate as main crystal phases by adjusting the components of the glass ceramics, the internal quality of the glass ceramics is uniform, the glass ceramics can be efficiently and stably produced, and the glass ceramics have the high hardness, the high Young modulus and the higher transmittance, and can be widely applied.

Description

technical field [0001] The invention relates to a glass-ceramic. Background technique [0002] Glass-ceramic with quartz solid solution and lithium disilicate as the main crystal phase has controllable thermal expansion coefficient, high hardness and mechanical strength, high thermal stability, good chemical stability and electrical insulation, and good The transparency of the filter can be used on the substrate of the dielectric film in the filter, the protective mirror, the disk substrate, etc. [0003] Glass-ceramic is a material that forms an irregular and uniform network structure through rapid cooling. When glass-ceramic is produced, it first needs to be cooled to become a uniform glass body, and then through subsequent heat treatment to achieve uniform distribution and controllable growth of crystals in the glass. At present, the heat treatment temperature of glass-ceramics is divided into two stages, the nucleation stage and the crystal growth stage. [0004] Duri...

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Problems solved by technology

[0004] During the molding process of the original glass of glass-ceramics, the glass tends to be milky and blue, resulting in crystal nuclei or crystals of different sizes in the glass. After heat treatment, the size and distribution of crystals inside the glass are uneven, resulting in huge changes in glass performance. Fluctuation; especially when forming the initial glass of glass-ceramics with quartz solid solution and lithium disilicate as the main crystal phase, it is easy to milk and turn blue, resulting in uneven interior of the glass, and cannot be continuously and stably produced efficiently

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