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The Bi2O3–Nb2O5–NiO Phase Diagram

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The Bi2O3–Nb2O5–NiO phase diagram at 1100°C was determined by means of solid-state synthesis, X-ray diffraction, and scanning electron microscopy. A ternary eutectic with a melting point below 1100°C was found to exist in the field between NiO, Bi2O3, and the end-member of the Bi2O3–Nb2O5 solid solution. The existence of the previously reported Bi3Ni2NbO9 phase was disproved. A pyrochlore homogeneity range around Bi1.5Ni0.67Nb1.33O6.25 was determined together with all the phase relations in this phase diagram.

Document Type: Research Article


Affiliations: Advanced Materials Department, Jamova 39, 1000 Ljubljana, Slovenia

Publication date: September 1, 2005

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