Mg-Al-Si spinelle crystallized glass

Abstract

The invention provides Mg-Al-Si spinelle crystallized glass, which is prepared from the following ingredients in percentage by weight: 20 to 45 weight percent of Al2O3, 25 to 60 weight percent of SiO2, 8 to 18 weight percent of MgO, 3 to 10 weight percent of TiO2, 0 to 5 weight percent of ZrO2, 0 to 3 weight percent of P2O5, 0 to 2 weight percent of Li2O, 0 to 2 weight percent of Na2O, 0 to 2 weight percent of K2O and 0.5 to 3 weight percent of Sb2O3. The product has the characteristics of high intensity, high hardness, dropping resistance, low expansion and excellent dielectric property.

Description

technical field [0001] The invention relates to the field of glass-ceramics, in particular to a magnesium-aluminum-silicate spinel glass-ceramics and a preparation method thereof. Background technique [0002] Glass-ceramics is a polycrystalline solid material formed by the controlled crystallization of specific glass components. It has both the structural characteristics and properties of glass and ceramics. It is a new type of inorganic non-metallic material that is developing and has broad application prospects. Spinel glass-ceramics is a kind of glass-ceramics with spinel as the main crystal phase. It has a low thermal expansion coefficient, good corrosion resistance, high mechanical strength, high hardness (Mohs hardness ~ 8), and resistance to corrosion. Good abrasion resistance, good thermal shock resistance, excellent dielectric properties and other excellent properties, can be used as circuit substrates, device casings, capacitor materials, solid-state lasers, etc.,...

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Problems solved by technology

[0010] In addition, the disadvantages of the glass back cover are also very obvious. Its thermal conductivity is not good, its strength and hardness are not enough (Mohs hardness is lower than 7), it is fragile and easy to crack, and its drop resistance is weak, and it is easy to leave large areas of irreversible scars; The zirconia ceramic back cover has many problems such as high performance requirements for zirconia powder, insufficient production capacity, and high price; moreover, zirconia ceramics need to go through nano-scale powder preparation, slurry, granulation, molding, sintering, and post-processing And other manufacturing processes, the process is long and complicated, resulting in low product yield, and its proportion is relatively large

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