发明申请
- 专利标题: METHOD OF PRODUCING VITREOUS SILICA CRUCIBLE
- 专利标题(中): 生产维生素二氧化硅可溶性的方法
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申请号: US12304154申请日: 2008-07-25
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公开(公告)号: US20100162760A1公开(公告)日: 2010-07-01
- 发明人: Takeshi Fujita , Minoru Kanda
- 申请人: Takeshi Fujita , Minoru Kanda
- 申请人地址: JP Akita-ken
- 专利权人: JAPAN SUPER QUARTZ CORPORATION
- 当前专利权人: JAPAN SUPER QUARTZ CORPORATION
- 当前专利权人地址: JP Akita-ken
- 优先权: JP2007-196649 20070727
- 国际申请: PCT/JP2008/063443 WO 20080725
- 主分类号: C03B29/00
- IPC分类号: C03B29/00
摘要:
A method for manufacturing a quartz glass crucible has a deposition step of depositing quartz powder on an inner wall surface of a bottomed cylindrical mold, while rotating the mold, and a melting step of obtaining the quartz glass crucible by vitrifying the quartz powder deposited on the inner wall surface of the mold by heating and melting the quartz powder. In the deposition step, under a state where the quantity of electrostatic charge of the quartz powder is controlled to be within a range of 1.0 kV or below in absolute value, the quartz powder is applied to the inner wall surface of the mold, and the thickness of the quartz glass crucible is controlled by maintaining the density of the quartz powder deposition layer on the inner wall surface of the mold within a fixed range.
公开/授权文献
- US08047020B2 Method of producing vitreous silica crucible 公开/授权日:2011-11-01
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