发明授权
- 专利标题： Method of manufacturing granulated silica powder, method of manufacturing vitreous silica crucible
- 专利标题（中）： 造粒二氧化硅粉末的制造方法，石英坩埚的制造方法
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申请号： US13308223申请日： 2011-11-30
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公开(公告)号： US09284207B2公开(公告)日： 2016-03-15
- 发明人: Toshiaki Sudo , Takuma Yoshioka , Koichi Suzuki , Shinsuke Yamazaki
- 申请人： Toshiaki Sudo , Takuma Yoshioka , Koichi Suzuki , Shinsuke Yamazaki
- 申请人地址： JP Tokyo
- 专利权人： SUMCO CORPORATION
- 当前专利权人： SUMCO CORPORATION
- 当前专利权人地址： JP Tokyo
- 代理机构： Law Office of Katsuhiro Arai
- 优先权： JP2010-267999 20101201
- 主分类号： C03B19/01
- IPC分类号： C03B19/01 ; C03B19/09 ; C03B19/06 ; C03B20/00 ; B02C23/00 ; C03B1/02
摘要：
The present invention provides a method of manufacturing a vitreous silica crucible having a transparent layer by use of waste vitreous silica, and silica powder suitable for the manufacturing. According to the present invention, there is provided a method of manufacturing granulated silica powder comprising a process for pulverizing waste vitreous silica generated in the manufacturing process of a crucible to form silica fine powder having an average particle diameter of 100 μm or less, and a process for granulating the silica fine powder to obtain granulated silica powder having an average particle diameter of 50 μm or more under helium atmosphere.
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