Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1609720 | Journal of Alloys and Compounds | 2015 | 6 Pages |
Abstract
The thermal diffusivity of (Pu,Am)O2 was measured by the laser flash method in the temperature range from 750Â K to 1450Â 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 1250Â 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 7.2Â 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
Authors
Taku Matsumoto, Tatsumi Arima, Yaohiro Inagaki, Kazuya Idemitsu, Masato Kato, Kyoichi Morimoto, Masahiro Ogasawara,