Effect of the Concentration of Components and the Size of Heaters on the Thermal State of a High-Pressure Cell to Study the Solubility of Gallium Nitride in Iron

Effect of the Concentration of Components and the Size of Heaters on the Thermal State of a High-Pressure Cell to Study the Solubility of Gallium Nitride in Iron

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 represen...

Full description

Saved in:
Bibliographic Details
Published in:Journal of superhard materials Vol. 45; no. 2; pp. 83 - 92
Main Authors: Liudvichenko, O. P., Lyeshchuk, O. O., Petrusha, І. A.
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-04-2023
Springer Nature B.V
Subjects:
Chemistry
Chemistry and Materials Science
Finite element method
Gallium nitrides
Heat transmission
Heaters
High pressure
Iron
Physical Chemistry
Pressure cells
Production
Properties
Solubility
Structure
Temperature gradients
Thickness
Zirconium dioxide
gallium nitride
finite element method
high-pressure apparatus (HPA)
high-pressure cell (HPC)
high temperature
high pressure
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 ZrO 2 and graphite of 60 and 40 wt %, respectively.
ISSN:1063-4576
1934-9408
DOI:10.3103/S1063457623020077