Phase Relations in the Pyrochlore-Rich Part of the Bi2O3−TiO2−Nd2O3 System |
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Authors: | pela Kunej,Sre o D. kapin, Danilo Suvorov |
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Affiliation: | Jožef Stefan Institute, Advanced Materials Department, 1000 Ljubljana, Slovenia |
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Abstract: | In this study we used solid-state synthesis to determine the phase relations in the pyrochlore-rich part of the Bi2O3−TiO2−Nd2O3 system at 1100°C. The samples were analyzed using X-ray powder diffraction and scanning electron microscopy with energy- and wavelength-dispersive spectroscopy. A single-phase pyrochlore ceramic was obtained with the addition of 4.5 mol% of Nd2O3. We determined the solubility limits for the three solid solutions: (i) the pyrochlore solid solution Bi(1.6–1.08 x )Nd x Ti2O(6.4+0.3 x ), where 0.25< x <0.96; (ii) the solid solution Bi4− x Nd x Ti3O12, where 0< x <2.6; and (iii) the Nd2− x Bi x Ti2O7 solid solution, where 0< x <0.35. The determined phase relations in the pyrochlore-rich part are presented in a partial phase diagram of the Bi2O3−TiO2−Nd2O3 system in air at 1100°C. |
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