发明名称 |
METHOD AND APPARATUS FOR MANUFACTURING QUARTZ GLASS CRUCIBLE |
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. |
申请公布号 |
EP2226300(A4) |
申请公布日期 |
2011.04.20 |
申请号 |
EP20080825887 |
申请日期 |
2008.11.28 |
申请人 |
JAPAN SUPER QUARTZ CORPORATION |
发明人 |
KISHI, HIROSHI;KANDA, MINORU;MORIKAWA, MASAKI |
分类号 |
C03B20/00;C30B15/10 |
主分类号 |
C03B20/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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