Influence of Annealing Conditions for Synthesized Powder on Grain Growth in GdPrS_3 Sintered Compact

摘要

A cubic Th_3P_4-type GdPrS_3 sintered compact was synthesized according to the following procedure. (1) A multiple oxide containing Gr and Pr was produced by the complex polymerization method, (2) rhombic GdPrS_3 was produced from the multiple oxide by CS_2 gas sulfurization, and (3) the cubic Th_3P_4-type GdPrS_3 sintered compact was produced from the rhombic GdPrS_3 by annealing in a vacuum followed by pulsed electric current sintering. In particular, the influence of the annealing conditions on the oxygen and carbon impurity concentrations in the synthesis powder before sintering and the crystal grain size and composition of the sintered compact was investigated.