Lattice thermal expansion studies of Th_(1-x)Nd_xO_(2-x/2) solutions

摘要

The synthesis, characterization and lattice thermal expansion studies of the ThO_2-Nd_2O_3 phase with general compositions Th_(1-x)Nd_x-O_(2-x/2) are reported. Based on XRD data the composition corresponding to solid solubility limit of NdO_(1.5) in ThO_2 lattice under conditions of slow cooling from 1673 K was previously reported as Th_(0.50)Nd_(0.50)O_(0.75). The lattice thermal expansion (293-1473 K) behavior of the solid solutions has been investigated by high temperature XRD and found to show a gradual increase with increasing content of NdO_(1.5) in Th_(1-x)Nd_xO_(2-x/2) series.