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The synthesis, characterization and bulk thermal expansion studies of a series of compounds with the general composition Th 1− x Nd x O 2− x /2 (0 ≤ x ≤ 1) are reported. The XRD pattern of each product was refined to know the solid solubility limit and the homogeneity range. The solid solubility limit of NdO 1.5 in ThO 2 lattice, under the conditions of slow cooling from 1673 K, is represented as Th 0.50 Nd 0.50 O 1.75 (i.e., 50 mol.% of NdO 1.5 ). The subsequent compositions were found to be bi-phasic as Nd 2 O 3 peaks started appearing. The bulk thermal expansion measurements from 293 to 1123 K, as investigated by a dilatometer, revealed that the α l value, within the homogeneity range, increases with increasing Nd 3+ content. |
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