Stability of rare earth oxides in a moist environment at elevated temperatures—Experimental and thermodynamic studies

Volatilisation tests enabled to quantify the stability of different rare earth sesquioxides, RE 2O 3 (where RE = Sc, Dy, Er, Yb) and to understand the corrosion process. These tests were carried out at temperatures ranging from 1000 to 1400 °C in moist air with 50 kPa of water at atmospheric pressur...

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Bibliographic Details
Published inJournal of the European Ceramic Society Vol. 30; no. 9; pp. 1911 - 1917
Main Authors Courcot, Emilie, Rebillat, Francis, Teyssandier, Francis, Louchet-Pouillerie, Caroline
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.07.2010
Subjects
Chemical properties
Corrosion
Rare earth oxide
Refractories
Thermodynamics
Rare earth oxide
Thermodynamics
Chemical properties
Corrosion
Refractories
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Summary:Volatilisation tests enabled to quantify the stability of different rare earth sesquioxides, RE 2O 3 (where RE = Sc, Dy, Er, Yb) and to understand the corrosion process. These tests were carried out at temperatures ranging from 1000 to 1400 °C in moist air with 50 kPa of water at atmospheric pressure, under a flowing gas velocity of 5 cm s −1. Besides the volatilisation rate, the nature of the volatile gaseous species was determined. The proposed experimental method allowed too to assess the Gibbs free energy of formation of these gaseous volatile species. Finally, the stability of each rare earth oxide under a moist environment at high temperature was compared.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2010.02.012