Glass-ceramic

Abstract

The invention discloses a microcrystalline glass, which contains the following percentage percentage components: SIO 2 : 65-80 %, al 2 O 3 : 0 ~ 3.5 %, li 2 O: 7 ~ 12.5 %, K 2 O: 0.5 ~ 3 %, 3 % <y 2 O 3 ≦ 10 %, P, 2 O 5 : 1.5 ~ 4 %, ZRO 2 : 1 to 5 %, MGO: 0.5-2 %, ZNO: 0.5-2 %.By adjusting the microcrystalline glass component, the present invention solves the problem of the molding hair milk with lithium solid solution and lithium siliconate as the main crystal phase, which makes it uniform and efficiently and stable to produce.Micro -crystal glass has high hardness, high Yang's modulus and high transmission rate, and is widely used.

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...

AI Technical Summary

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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