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    • 5. 发明公开
    • 용융 석영 유리 및 그 제조 방법
    • 熔融石英玻璃及其制造方法
    • KR1020090057237A
    • 2009-06-04
    • KR1020097004337
    • 2007-09-11
    • 토소가부시키가이샤토소 에스지엠 가부시키가이샤
    • 아라이카즈요시타카하타츠토무하시모토신키치우치다마사토야마다노부스케하라다요시노리호리코시히데하루
    • C03C4/00
    • C03C4/0085C03B19/066C03B20/00C03B2201/03C03B2201/04C03C3/06C03C4/10C03C2201/23C03C2201/50C03C2201/54Y02P40/57
    • A fused quartz glass comprising OH in a content of 5 ppm or less and Li, Na, K, Mg, Ca and Cu each in a content of less than 0.1 ppm, exhibiting an internal transmittance, as measured at a thickness of 10 mm with respect to ultraviolet radiation of 245 nm wavelength, of 95% or greater. Preferably, the fused quartz glass exhibits a viscosity coefficient of 1011.5 Pa.s or greater at 1215°C, and exhibits a Cu ion diffusion coefficient, as measured in a region from over 20 mum up to 100 mum in a depth from the surface when left in atmosphere at 1050°C for 24 hours, of 1810-10 cm2/sec or below. This fused quartz glass is produced by converting a raw material silica powder to cristobalite and thereafter fusing the same in a nonreducing atmosphere. This fused quartz glass has the properties of being high in the transmittance of ultraviolet ray, visible light and infrared ray, being highly purified, having high heat resistance and being low in the diffusion velocity of metal impurities, so that it is suitable for use as various optical materials, members for semiconductor production, members for liquid crystal production, etc.
    • 包含5ppm以下的OH和Li,Na,K,Mg,Ca和Cu的熔融石英玻璃,其含量小于0.1ppm,表现出内部透射率,以10mm的厚度测量, 相对于245nm波长的紫外线辐射,为95%以上。 优选地,熔融石英玻璃在1215℃下的粘度系数为1011.5Pa.s或更大,并且表现出在离表面深度超过20μm至100μm的区域中测量的Cu离子扩散系数, 在1050℃的大气中放置24小时,为1810-10cm2 / sec或更低。 该熔融石英玻璃通过将原料二氧化硅粉末转化为方英石,然后在非还原性气氛中将其熔融而制得。 该熔融石英玻璃具有紫外线,可见光和红外线的透射率高,高纯度,耐热性高,金属杂质扩散速度低的特性,因此适用于 各种光学材料,半导体制造用构件,液晶制造用构件等。