Apparatus for the production of silica crucible
In an apparatus for the production of a silica crucible comprising a carbon mold suitable for producing the silica crucible by the rotating mold method, the carbon mold has a thermal conductivity of not more than 125 W/(m·K).
1. An apparatus for the production of a silica crucible comprising:
a carbon mold for processing silica or quartz powder to form a silica or quartz powder deposition layer and for producing the silica crucible by a rotating mold method, characterized in that the carbon mold has a thermal conductivity of not more than 125 W/(m·K), and the carbon mold is configured to reduce pressure inside the silica or quartz powder deposition layer from the side of the mold; and
an arc heater configured to heat the silica or quartz powder deposition layer from a spacing side of the carbon mold.
2. An apparatus for the production of a silica crucible according to claim 1 , wherein the carbon mold has a thermal conductivity of not less than 70 W/(m·K).
3. An apparatus for the production of a silica crucible according to claim 1 wherein the carbon mold has a bulk specific gravity of not more than 1.6 g/cm 3 .
4. An apparatus for the production of a silica crucible according to claim 3 , wherein the carbon mold has a bulk specific gravity of not less than 1.3 g/cm 3 .
5. An apparatus for the production of a silica crucible according to claim 2 , wherein the carbon mold has a bulk specific gravity of not more than 1.6 g/cm 3 .
6. An apparatus for the production of a silica crucible according to claim 5 , wherein the carbon mold has a bulk specific gravity of not less than 1.3 g/cm 3 .