Thermodynamic Analysis of the Metastable Regions for the AI2O3-SiO2 System

Autor:	Andjelka Mihajlov, Branislav Zivanovic, Mirjana Djurić, Ljiljana Petrasinovic-Stojkanovic
Rok vydání:	1996
Předmět:	Chemistry Thermodynamics Corundum Liquidus engineering.material Gibbs free energy symbols.namesake Metastability Materials Chemistry Ceramics and Composites engineering symbols Physical chemistry Binary system Mixing (physics) Phase diagram Eutectic system
Zdroj:	Journal of the American Ceramic Society. 79:1252-1256
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1151-2916.1996.tb08580.x
Popis:	The paper offers a short review of investigations conducted on the Al{sub 2}OI{sub 3}-SiO{sub 2} system, particularly from the point of view of an appearance of immiscibility gaps, below the liquidus temperatures. Based on theoretical criteria and using the data along the liquidus curves (for mullite and corundum), this investigation suggests immiscibility regions at both ends of the phase diagram. That is, it defines the Margules polynomials for calculation of the activity coefficients necessary for determining the Gibbs energy of mixing. Obtained results are in good agreement with the results reported by Risbud and Pask and other investigators who have found immiscibility gaps at rather high temperatures.
Databáze:	OpenAIRE
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