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B. Kubíková, Vladimir Danek, Marcelle Gaune-Escard

Phase Equilibria in the Molten System KF-K₂NbF₇-Nb₂O₅

Keywords: Phase Equilibria, Molten Salts, Oxofluoroniobate Compounds

Phase equilibria in the molten system KF-K₂NbF₇-Nb₂O₅ were investigated up to 20mol% of Nb₂O₅ by thermal analysis and differential scanning calorimetry. In the binary and ternary systems oxofluoroniobate compounds are formed. They were evidenced by comparison of experimetal X-ray diffraction patterns with those in the international X-ray diffraction database (PDF-2). In the experimental compostion range the phase diagram of the molten KF-K₂NbF₇-Nb₂O₅ system consists of five crystallisation fields corresponding to KF, K₃NbF₈, K₂NbF₇, K₂NbO₃F and K₃NbOF₆.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 220, 06/2006
Pages: 765 - 773

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