| Autor: |
Liudvichenko, O. P., Lyeshchuk, O. O., Petrusha, І. A. |
| Zdroj: |
Journal of Superhard Materials; Apr2023, Vol. 45 Issue 2, p83-92, 10p |
| Abstrakt: |
We considered the existing technologies for obtaining crystals of gallium nitride. The finite element method was used to create a model of the thermal state of a cell in a high-pressure apparatus that was used to examine the solubility of gallium nitride in iron. The calculation results are represented as temperature fields in different elements of the apparatus. The effect of varying the wall thickness of a tubular heater and changing the concentration of zirconium dioxide in axial heaters on the thermal state of a high-pressure cell is studied. When the wall thickness of the tubular heater is altered, the temperature in the center of the cell changes linearly. An increase in the heater thickness leads to an insignificant (~2°C) increase in the maximum temperature drop in the iron sample under study. The temperature difference at the characteristic points of the cell in the radial and axial directions decreases with an increase in the concentration of zirconium dioxide in the axial heaters. The optimal composition of axial heaters for conducting experiments on studying the solubility of gallium nitride in iron corresponds to the concentrations of ZrO2 and graphite of 60 and 40 wt %, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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