发明授权
US09347148B2 Vitreous silica crucible with specific ratio of transparent layer and bubble-containing layer thicknesses 有权
玻璃硅石坩埚具有特定比例的透明层和含气泡层厚度

Vitreous silica crucible with specific ratio of transparent layer and bubble-containing layer thicknesses
摘要:
Provided is a vitreous silica crucible, which is resistant to deformation and corrosion even when heated at high temperature for a long time. There is provided a vitreous silica crucible of the present invention including a substantially cylindrical straight body portion, a curved bottom portion, and a corner portion smoothly connecting the straight body portion and the bottom portion, wherein a wall of the vitreous silica crucible includes, from an inner surface side, a transparent layer and a bubble-containing layer, and a ratio of a thickness of the bubble-containing layer with respect to a thickness of the transparent layer at an intermediate position between an upper end and a lower end of the straight body portion is 0.7 to 1.4.
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