Article ID Journal Published Year Pages File Type
1609720 Journal of Alloys and Compounds 2015 6 Pages PDF
Abstract
The thermal diffusivity of (Pu,Am)O2 was measured by the laser flash method in the temperature range from 750 K to 1450 K, and the thermal conductivity was estimated from the measured thermal diffusivity, the bulk density and the heat capacity obtained from the Kopp-Neumann rule. In the measurements up to 1250 K, the O/M ratio of the specimens was kept almost constant at 2, and it could be concluded that the thermal conductivity of stoichiometric (Pu,Am)O2 with a small Am content was insensitive to Am content. However, the O/M ratio of the specimen with 7.2 mol% Am content might be reduced at high temperatures, and it might lead to a small decrease in thermal conductivity. These Am content dependences of thermal conductivity were well explained by the phonon scattering model for thermal resistivity.
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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