发明名称 |
Method of manufacturing vitreous silica crucible |
摘要 |
There is provided a method of manufacturing a vitreous silica crucible having non-bubbles on the inner surface without necessitating new apparatuses for grinding and polishing and without damaging the productivity. According to the present invention, there is provided a method of manufacturing a vitreous silica crucible including the processes of: gathering a vitreous silica layer containing residual bubbles existing in a near-surface region of the transparent layer of the vitreous silica crucible by controlling the number of rotations applied to the vitreous silica crucible in a state that an inner surface side of the vitreous silica crucible is fused by arc heating; and moving a portion of a non-bubble layer in the surface of the transparent layer exposed by movement of the residual bubble-containing layer to cover a region in which bubbles have gathered with the non-bubble layer. |
申请公布号 |
US8671716(B2) |
申请公布日期 |
2014.03.18 |
申请号 |
US201113308328 |
申请日期 |
2011.11.30 |
申请人 |
SUDO TOSHIAKI;YOSHIOKA TAKUMA;JAPAN SUPER QUARTZ CORPORATION |
发明人 |
SUDO TOSHIAKI;YOSHIOKA TAKUMA |
分类号 |
C03B19/09 |
主分类号 |
C03B19/09 |
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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