Li2O-Al2O3-SiO2-BASED CRYSTALLINE GLASS AND Li2O-Al2O3-SiO2-BASED TRANSPARENT CRYSTALLIZED GLASS FORMED BY HEAT-TREATING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide Li₂O-Al₂O₃-SiO₂-based transparent crystallized glass hardly causing crack even in being exposed in a combustion atmosphere for a long time and Li₂O-Al₂O₃-SiO₂-based crystalline glass used for producing the same.;SOLUTION: The Li₂O-Al₂O₃-SiO₂-based crystalline glass has ≥0.20/mm β-OH and ≤100 pieces /cm² of crystals present on the surface and having ≥0.05 μm particle diameter and the Li₂O-Al₂O₃-SiO₂-based transparent crystallized glass is formed by heat-treating the Li₂O-Al₂O₃-SiO₂-based crystalline glass having ≥0.20/mm β-OH and ≤100 pieces/cm² of crystals present on the surface and having ≥0.05 μm particle diameter.;COPYRIGHT: (C)2006,JPO&NCIPI