GUENÉ-GIRARD, Simon; JUBERA, Veronique; WEILL, François; ROGER, Jérôme; FARGUES, Alexandre; HEINTZ, Jean-Marc

doi:10.1016/j.jeurceramsoc.2021.04.032

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GUENÉ-GIRARD, Simon
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

JUBERA, Veronique
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

WEILL, François
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of the European Ceramic Society. 2021, vol. 41, n° 10, p. 5316-5323

Elsevier

Résumé en anglais

The effect of silicon on the natural sintering of Y3NbO7 powders is studied. Characterizations shows that Si increases densification rate and grain growth but it also leads to the apparition of a secondary silicate phase. The silicate precipitation results from the segregation of silicon favored by matter transport through a liquid phase. The distribution of the secondary phase have been studied by electronic microscopy and mapped by micro-luminescence. Thermodynamic calculations of Gibbs energy of the different phase as well as binary and ternary phase diagrams have been conducted to support interpretation of the sintering experimental results.< Réduire

Mots clés en anglais

Niobate

thermodynamic calculation

phase diagram

sintering

silicon

rare earth

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Thermodynamic and experimental approach of the effect of Si on the sintering of Y3NbO7

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