다양한 산화물들이 리튬규산염 유리의 결정화에 미치는 영향

TLDR: In this article, a glass-ceramics based on lithium disilicate (Li₂SiSiO?) is prepared by heat-treatment of glasses in a system of SiO-Li-SiO-K-O-Al with different compositions.

Abstract: Glass-ceramics based on lithium disilicate(Li₂Si₂O?) are prepared by heat-treatment of glasses in a system of SiO₂-Li₂O-K₂O-Al₂O₃ with different compositions. The crystallization heat-treatment was conducted at the temperature range of 700~900℃ and samples were analyzed by XRD and SEM. Mechanical properties were determined by a Vicker’s hardness and 4 point bending strength. When SiO₂/Li₂O ratio increased, cristobalite and tridymite crystals showed more predominate than lithium disilicate crystals. Increase in Al₂O₃ contents in the glass suppressed crystallzation of lithium disilicate crystals. Increase in ZnO, B₂O₃ contents in the glass decreased crystallization temperature of lithium disilicate crystals, and increased mechanical properties because of the reduction of the lithium disilicate crystal size.