发明授权
- 专利标题： Method and apparatus for manufacturing vitreous silica crucible
- 专利标题（中）： 石英玻璃坩埚的制造方法和装置
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申请号： US12303994申请日： 2008-11-28
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公开(公告)号： US08196430B2公开(公告)日： 2012-06-12
- 发明人: Hiroshi Kishi , Minoru Kanda , Masaki Morikawa
- 申请人： Hiroshi Kishi , Minoru Kanda , Masaki Morikawa
- 申请人地址： JP Akita-Shi
- 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-Shi
- 代理机构： Greenblum & Bernstein, P.L.C.
- 优先权： JPP2007-310193 20071130
- 国际申请： PCT/JP2008/071704 WO 20081128
- 国际公布： WO2009/069773 WO 20090604
- 主分类号： C03B19/01
- IPC分类号： C03B19/01 ; C03B19/09 ; C03B19/06
摘要：
A method of manufacturing a vitreous silica crucible by a rotary mold method, which includes performing arc melting in a state in which electrodes are provided so as to be shifted from a mold central line, wherein, by this eccentric arc, the glass temperature difference during melting of a straight body portion, a curved portion and a bottom of the crucible is controlled to 300° C. or below and the thickness of a transparent layer of the straight body portion and the bottom is controlled to 70 to 120% of the thickness of a transparent layer of the curved portion.
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