Thermodynamic analysis of the W-Al2O3 system near the melting temperature of Al2O3: II. Chemical interactions at 1 × 10−5 bar
| Autor: | E. V. Antonov, S. A. Kobzareva, Kh. S. Bagdasarov, D. V. Kostomarov |
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| Rok vydání: | 2010 |
| Předmět: |
Aluminium oxides
Component (thermodynamics) Chemistry Closed system Thermodynamics chemistry.chemical_element General Chemistry Tungsten Condensed Matter Physics Chemical reaction Gibbs free energy symbols.namesake Condensed Matter::Superconductivity symbols Melting point General Materials Science Bar (unit) |
| Zdroj: | Crystallography Reports. 55:513-517 |
| ISSN: | 1562-689X 1063-7745 |
| DOI: | 10.1134/s1063774510030235 |
| Popis: | The W-Al2O3 system is considered at a basic component ratio of 1: 1. The composition and component concentrations in the closed system under isobaric-isothermal conditions and a residual pressure of 1 × 10−5 bar are determined by stochastic simulation and the minimization of the Gibbs free energy. The basic chemical reactions leading to tungsten oxidation near the Al2O3 melting temperature are determined, and the possibilities of their occurrence are calculated. Understanding the behavior of the system under these conditions allows one to stabilize the conditions for growing leucosapphire crystals from melt. |
| Databáze: | OpenAIRE |
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