METHOD OF MANUFACTURING RARE EARTH METAL ELEMENT-CONTAINING SILICA GLASS FOR OPTICS

文件类型：PDF文档
文件大小：105K
PROBLEM TO BE SOLVED : To provide a method of manufacturing rare earth metal element-containing silica glass for optics which is small in optical loss due to scattering or absorption, low in OH concentration and high in luminance efficiency. SOLUTION : In the method for manufacturing the rare earth metal element-containing silica glass for optics by heating and melting a powdery mixture comprising silica powder, a rare earth metal element and powder containing Al, the powdery mixture having ≤10 μm 50% diameter in volume particle distribution and containing <1% powder having ≥20 μm particle diameter is formed, and the powdery mixture is heated and maintained at 1, 700-1, 900°C under reduced pressure to vitrify, further stirring while heating to the temperature higher than the softening point. COPYRIGHT : (C)2007, JPO&INPIT