Abstract: The combinations of crucibles with different thermal properties were investigated. If the anisotropic material is used for making single layer crucible, it is preferable for the material larger thermal conductivity along transverse direction, small thermal conductivity along longitudinal direction or having comparative thermal conductivity along longitudinal direction to the crystal and its melt. It is unfavorable for material with small thermal conductivity along transverse direction and large thermal conductivity along longitudinal direction. For composite crucible, the conductivity of the two materials should be very close.

Key words: The combinations of crucibles with different thermal properties were investigated. If the anisotropic material is used for making single layer crucible, it is preferable for the material larger thermal conductivity along transverse direction, small thermal conductivity along longitudinal direction or having comparative thermal conductivity along longitudinal direction to the crystal and its melt. It is unfavorable for material with small thermal conductivity along transverse direction and large thermal conductivity along longitudinal direction. For composite crucible, the conductivity of the two materials should be very close.