Glass-ceramic

Abstract

Crystallized glass is formed by precipitating beta-spodumene solid solution or beta-quartz solid solution, and contains, by mass percent, 55-72% SiO2, 14-30% Al2O3, 2.9-6.0% Li2O, and 1.0-10.0% K2O, wherein a mass ratio between Li2O and K2O (Li2O / K2O) is 2.2 or less.

Description

technical field [0001] The present invention relates to glass ceramics that can be formed by wire drawing and glass ceramic products using the same. Background technique [0002] Glass ceramics are materials that exhibit heterogeneous properties in glass due to various crystals precipitated from glass. For example, if crystals of β-quartz solid solution or β-spodumene solid solution are precipitated, glass ceramics showing no low expansion or negative expansion in glass can be obtained. Second, glass ceramics generally have higher mechanical strength than glass due to the presence of these crystals. [0003] In recent years, it has been proposed to process glass ceramics with such excellent characteristics into precise thin rod shapes, thin tube shapes, thin plate shapes, etc. by wire drawing, and to apply them to electronic components, precision mechanical components, etc., and make them practical. Usually, the raw material glass of glass ceramics is designed so that crys...

AI Technical Summary

Problems solved by technology

[0004] However, the glass ceramics that can be drawn in these publications have a high viscosity of the raw glass, so in order to obtain a homogeneous glass without striae, the raw glass must be melted at high temperature, the deterioration of the furnace and additional equipment is significant, and the productivity is difficult. improve

[0005] In addition, in order to melt the raw glass at a lower temperature, reduce the viscosity of the raw glass to contain a large amount of Li with the above-mentioned effect 2 O as a component of raw glass, the amount of crystallization will increase, the softening point of glass ceramics will become higher, and the wire drawing temperature will be higher than the melting point of the precipitated crystals. Because of the melting and re-precipitation of crystals during wire drawing, there is wire drawing. The dimensional accuracy of the product deteriorates, and the worst case is the problem that wire drawing cannot be formed

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