CRYSTALLIZED GLASS, AND SUBSTRATE FOR REFLECTION MIRROR

摘要

PROBLEM TO BE SOLVED: To provide crystallized glass which is optimum as a material constituting a substrate for a reflection mirror. SOLUTION: The crystallized glass consists of celsian as the main crystal phase. The crystallized glass contains SiO2 , Al2 O3 , BaO, and TiO2 as the main constituting components, and further, contains Li2 O as a modifer component in the range of 0.05 to 1.0 wt.%. The crystallized glass substantially consists only of a crystal phase of celsian.