Glass ceramics and substrate thereof

Abstract

The invention provides glass ceramics and a substrate thereof. The glass ceramics have high heat conductivity and bent resistance. The glass ceramics comprise the following components in percentages by weight: 60-80% of SiO2, 4-20% of Al2O3, 0-15% of Li2O, greater than 0 but less than or equal to 12% of Na2O, greater than 0 but less than or equal to 5% of ZrO2, 0-5% of P2O5, 0-6% of TiO2 and greater than 0 but less than 0.35 of ZrO2 / Li2O. The heat conductivity of the glass ceramics at the room temperature is 2 w / m.k or above, the Vickers hardness of the toughened glass ceramics is 600 kgf / mm<2> or above, and the three-point bent strength is 450 Mpa or above. The glass ceramics or the substrate is suitable for protecting components of portable electronic equipment and optical equipment, andcan further be used for other decorations such as outer frame components of portable electronic equipment with the proper appearance of a glass material.

Description

technical field [0001] The present invention relates to a glass-ceramic and a substrate based on the glass-ceramic, in particular to a glass-ceramic with high thermal conductivity and high strength suitable for protective components such as portable electronic equipment or optical equipment. Glass-ceramics and substrates. Background technique [0002] For portable electronic devices such as smartphones, tablet PCs, and other optical devices, back covers are required to protect the internal electronics. For these protective materials for the back cover, especially for electronic devices that require wireless signals, they are required to have high thermal conductivity, different individual colors and high strength, and can be used in harsh environments, and Good processing performance. In the past, metal was usually used as the protective material for the back cover, but the metal back cover would seriously affect the reception of the signal, so it could only be designed in...

AI Technical Summary

Problems solved by technology

Glass-ceramics have higher mechanical properties and can increase the thermal conductivity of glass due to the formation of crystallites in the glass, but conventional glass-ceramics are not suitable for the above-mentioned protective materials due to poor thermal conductivity and strength

In addition, conventional crystallized glass has a high viscosity or high devitrification property of raw glass, so productivity is low, and it is difficult to use it as the above-mentioned protective material.

[0005] Japanese Patent Application Laid-Open No. 2014-114200 discloses a glass-ceramic substrate for information recording media. After the glass-ceramic substrate is chemically tempered, it cannot obtain a sufficient compressive stress value and cannot form a deep stress layer.

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