| 摘要 |
#CMT# #/CMT# The device for producing a block of crystalline material with a part of molten material bath, comprises a crucible (2) with a bottom (3), a unit for extracting the heat disposed on the crucible, and a unit (7) for modulating a thermal conductivity interposed between the bottom of crucible and the extraction unit. The modulation unit comprises plates parallel to the bottom of the crucible, a unit for connecting and spacing the plates with one another, a controlled atmosphere comprising a gas with thermal conductivity of >= 0.01 W/mK, and a conduction layer connected to the crucible bottom. #CMT# : #/CMT# The device for producing a block of crystalline material with a part of molten material bath, comprises a crucible (2) with a bottom (3), a unit for extracting the heat disposed on the crucible, and a unit (7) for modulating a thermal conductivity interposed between the bottom of crucible and the extraction unit. The modulation unit comprises plates parallel to the bottom of the crucible, a unit for connecting and spacing the plates with one another, a controlled atmosphere comprising a gas with thermal conductivity of >= 0.01 W/mK, and a conduction layer connected to the crucible bottom. The plates are equipped with projections constituting struts, and have an excessive thickness, an emmisivity of lower than 0.5 and a conductivity of >= 10 W/mK. Thermally insulating spring-type elements are arranged between the plates. The connection and spacing unit comprises a control rod connected to the heat extraction unit. #CMT#USE : #/CMT# The device is useful for producing a block of crystalline material such as silicon and germanium with a part of molten material bath, where the crystalline material is useful for the production of photovoltaic cell. #CMT#ADVANTAGE : #/CMT# The device is capable of economically, easily and simply producing a block of crystalline material with a part of molten material bath using a heat flow whose variation can be precisely controlled. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows a schematic view of a device for producing a block of crystalline material. 2 : Crucible 3 : Bottom 4 : Side wall 5 : Conduction material 7 : Modulation unit. #CMT#INORGANIC CHEMISTRY : #/CMT# Preferred Components: The plates are made of molybdenum. The controlled atmosphere comprises helium and argon. |
