Thermal diffusivities of actinide hydrides (UTh4Zri0Hx: x=18-27) have been measured in the temperature range from room temperature to 700-940 K by means of a laser-flash method. At high temperatures above 673 K, special specimen containers with sapphire window have been used to avoid composition change due to decomposition of hydrides. The temperature and hydrogen concentration dependences of the thermal diffusivities have been expressed with an empirical equation as functions of the temperature and the hydrogen concentration. Consequently, the thermal conductivities in higher temperatures of 700-900 K have been estimated with the present data of the thermal diffusivities and literature data of specific heats and densities.
- Actinide hydride
- Thermal conductivity
- Thermal diffusivity
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering