Abstract
For the artificial growth of diamond crystals using the belt type high pressure apparatus, it is very important to control precisely the temperature distribution in specimen.
To clarify the temperature distribution in specimen, the measurement using thermocouples gives rise to much difficulty, since the wires of the thermocouples are easily cut off due to the thermal deformation of specimen.
In this paper, numerical analysis using the finite element method (FEM) is adopted to calculate the temperature distribution in specimen.
Main conclusions are as follows:
(1) The usefulness and accuracy of the FEM analysis are comfirmed by comparison between the calculated results and measured ones.
(2) It is confirmed that the temperature distribution in the specimen is adequate for diamond growth.
(3) The maximum diameter of carbon heater in specimen can be decided, referring to the temperature of the cylinder wall of belt type high pressure apparatus and the strength of wall material.
