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Thermodynamic assessment of the MgO–Al2O3–SiO2 system

Published online by Cambridge University Press:  01 April 2005

Huahai Mao ,
Olga Fabrichnaya ,
Malin Selleby  and
Bo Sundman
Huahai Mao*
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden
Olga Fabrichnaya
Affiliation:
Max-Planck-Institute fuer Metallforschung, 70569, Stuttgart, Germany
Malin Selleby
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden
Bo Sundman
Affiliation:
Department of Materials Science and Engineering, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

Thermodynamic properties of the phases in the MgO–Al2O3–SiO2 system were assessed, resulting in a set of self-consistent thermodynamic data. The two ternary compounds, cordierite and sapphirine, were optimized from subsolidus reactions. The liquid phase was described by the ionic two-sublattice model with a new species AlO2−1, yielding the formula (Al+3,Mg+2)P(AlO2−1,O−2,SiO4−4,SiO20)Q. Projection of the liquidus surface was calculated. Various isothermal and isoplethal sections were compared with the experimental data.

Keywords

Phase equilibriaThermodynamic properties
Type
Research Article
Information
Journal of Materials Research , Volume 20 , Issue 4 , April 2005 , pp. 975 - 986
Copyright
Copyright © Materials Research Society 2005

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