Chemical transformations in the W-Al{sub 2}O{sub 3} system under pressure P = 1 bar near the melting point of aluminum oxide
- Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)
The W-Al{sub 2}O{sub 3} system has been considered at a temperature of 2400 K and a pressure of 1 bar. The main chemical processes providing the interaction between the components of the system have been determined. It is shown that evaporation of Al{sub 2}O{sub 3} into the gas phase gives rise to numerous reactions, which involve not only tungsten but also Al{sub 2}O{sub 3} melt. It is concluded that such interactions can be reduced by decreasing the Al{sub 2}O{sub 3} evaporation, which can be done by increasing the inert gas pressure. This approach makes it possible both to optimize the parameters of sapphire crystal growth and increase the lifetime of a tungsten heater and other units of crystallization systems.
- OSTI ID:
- 22051235
- Journal Information:
- Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 1 Vol. 55; ISSN 1063-7745; ISSN CYSTE3
- Country of Publication:
- United States
- Language:
- English
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