Phase Relations in the LaNb3O9 – NaNbO3 System in the Temperature Range of 20 TO 800°C

Phase Relations in the LaNb3O9 – NaNbO3 System in the Temperature Range of 20 TO 800°C A portion of the constitutional diagram of the LaNb3O9 – NaNbO3 system in the temperature range from 20 to 800°C is constructed. The existence of a solid-solution region (down to 10 mol.% NaNbO3 ) involving a low-temperature monoclinic modification of LaNb3O9 and of a broad region (from 20 to 75 mol.% NaNbO3 ) of tetragonal perovskite solid solutions is established. High-temperature perovskite solid solutions based on the LaNb3O9 rhombic modification undergo an eutectoid decomposition into two perovskite solid solutions. LaNb3O9 and the high-temperature solid solutions are shown to be antiferroelectric phases with high values of dielectric constant. Refractories and Industrial Ceramics Springer Journals

Phase Relations in the LaNb3O9 – NaNbO3 System in the Temperature Range of 20 TO 800°C

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Kluwer Academic Publishers-Plenum Publishers
Copyright © 2001 by Plenum Publishing Corporation
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
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