Phase equilibria investigations and thermodynamic modeling of the PbO-Al2O3 system - Archive ouverte HAL
Article Dans Une Revue International Journal of Materials Research Année : 2015

Phase equilibria investigations and thermodynamic modeling of the PbO-Al2O3 system

Nicolas David
Michel Vilasi
Fayssal Oudich
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Résumé

The PbO-Al2O3 system has been extensively studied in literature. In the present study, experimental work was conducted in which equilibria between phases were investigated under air between 600 degrees C and 800 degrees C by X-ray diffraction. Three intermediate compounds reported in literature were confirmed, which are PbAl12O19 (1PbO:6A(2)O(3)), PbAl2O4 (1:1) and Pb2Al2O5 (2:1). Results support a widely accepted version of the phase diagram in which these compounds exist. On the basis of the results obtained in this study and data considered from literature, a thermodynamic modeling according to the Calphad approach was performed, where all intermediate phases were considered as stoichiometric compounds and where the liquid phase was described by a twosublattice ionic liquid model. Good agreement has been obtained from thermodynamic optimization in comparison with experimental results.
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Dates et versions

hal-01295129 , version 1 (30-03-2016)

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Nicolas David, Michel Vilasi, Fayssal Oudich. Phase equilibria investigations and thermodynamic modeling of the PbO-Al2O3 system. International Journal of Materials Research, 2015, 106 (8), pp.832-840. ⟨10.3139/146.111248⟩. ⟨hal-01295129⟩
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