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1.Silica gel, synthetic quartz glass powder and shaped product of quartz glass 失效
标题翻译: 硅胶,合成石英玻璃粉末和石英玻璃制成的模制体公开(公告)号:EP0844212B1
公开(公告)日:2002-04-24
申请号:EP97120208.0
申请日:1997-11-18
发明人: Utsunomiya, Akira, Mitsubishi Chem. Corp. , Katsuro, Yoshio, Mitsubishi Chem. Corp. , Takazawa, Akihiro, Mitsubishi Chem. Corp. , Moriyama, Takashi, Mitsubishi Chem. Corp.
IPC分类号: C01B33/18
CPC分类号: C03B19/09 , C03B19/1065 , C03C3/06 , C03C12/00 , C03C14/004 , C03C2201/28 , C03C2201/30 , C03C2201/32 , C03C2201/50 , C03C2203/27 , C03C2214/16 , C03C2214/32
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2.Silica gel, synthetic quartz glass powder and shaped product of quartz glass 失效
标题翻译: Kieselsäuregel,synthetisches Quarzglaspulver undFormkörperaus Quarzglas公开(公告)号:EP0844212A1
公开(公告)日:1998-05-27
申请号:EP97120208.0
申请日:1997-11-18
发明人: Utsunomiya, Akira, Mitsubishi Chem. Corp. , Katsuro, Yoshio, Mitsubishi Chem. Corp. , Takazawa, Akihiro, Mitsubishi Chem. Corp. , Moriyama, Takashi, Mitsubishi Chem. Corp.
IPC分类号: C01B33/18
CPC分类号: C03B19/09 , C03B19/1065 , C03C3/06 , C03C12/00 , C03C14/004 , C03C2201/28 , C03C2201/30 , C03C2201/32 , C03C2201/50 , C03C2203/27 , C03C2214/16 , C03C2214/32
摘要: A synthetic quartz powder obtained by calcining a powder of silica gel, characterized in that white devitrification spots having sizes of larger than 20 µm in diameter formed in an ingot obtained by vacuum melting the synthetic quartz powder at a temperature of from 1780 to 1800°C to form an ingot, followed by maintaining the ingot at a temperature of 1630°C for 5 hours, are at most 10 spots/50 g.
摘要翻译: 通过煅烧硅胶粉末获得的合成石英粉末,其特征在于,在通过真空熔炼合成石英粉末在1780至1800℃的温度下形成的直径上形成的直径大于20μm的白色失透斑点 以形成锭,然后将锭保持在1630℃的温度5小时,至多10个点/ 50g。
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