TY - JOUR
T1 - Thermal conductivity measurement of (Pu1-xAmx)O2 (x = 0.028, 0.072)
AU - Matsumoto, Taku
AU - Arima, Tatsumi
AU - Inagaki, Yaohiro
AU - Idemitsu, Kazuya
AU - Kato, Masato
AU - Morimoto, Kyoichi
AU - Ogasawara, Masahiro
PY - 2015/4/25
Y1 - 2015/4/25
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jallcom.2014.11.205
DO - 10.1016/j.jallcom.2014.11.205
M3 - Article
AN - SCOPUS:84921654960
VL - 629
SP - 92
EP - 97
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -