Crystalline glass, crystallized glass, crystallized glass article, and process for producing crystallized glass article

摘要: A crystallized glass which can be redraw-molded and a process for producing article by redraw-molding. In the glass, maximum particle size of deposited crystals is 5 νm or below phase amounts to 10 85 % volume. It has softening point lower than melting main its crystallization does not proceed substantially, even when it heated temperature higher point. may produced premolding above-mentioned then orienting while heating