Thermophysical properties of perovskite type alkaline-earth metals and plutonium complex oxides

Tanaka, Kosuke  ; Sato, Isamu; Hirosawa, Takashi  ; Kurosaki, Ken*; Muta, Hiroaki*; Yamanaka, Shinsuke*

Polycrystalline specimens of strontium plutonate, SrPuO, have been prepared by mixing the appropriate amounts of PuO and SrCO powders followed by reacting and sintering at 1600 K under the flowing gas atmosphere of dry-air. The sintered specimens had a single phase of orthorhombic perovskite structure and were crack-free. The elastic moduli of SrPuO were determined from the longitudinal and shear sound velocities. The Debye temperature was also determined from the sound velocities and lattice parameter measurements. The thermal conductivity of SrPuO was calculated from the measured density at room temperature, literature values of heat capacity, and thermal diffusivity measured by laser flash method in vacuum.