Heat capacities and thermal conductivities of AmO $_{2}$ and AmO $_{1.5}$

Nishi, Tsuyoshi; Ito, Akinori*; Ichise, Kenichi ; Arai, Yasuo

The thermal diffusivities of AmO $_{2}$ and AmO $_{1.5}$ were measured by using a laser flash method. The heat capacities of AmO $_{2}$ and AmO $_{1.5}$ were measured by using a drop calorimetry. In these results, the heat capacity of AmO $_{2}$ was larger than that of AmO $_{1.5}$ and close to that of UO $_{2}$ . The thermal conductivities of AmO $_{2}$ and AmO $_{1.5}$ were found to decrease with increasing temperature in the temperature range investigated. The thermal conductivity of AmO $_{2}$ from 473 to 773 K was slightly smaller than those of UO $_{2}$ and PuO $_{2}$ and close to that of NpO $_{2}$ . On the other hand, the thermal conductivity of AmO $_{1.5}$ with A-type rare earth oxide structure was smaller than that of AmO $_{2}$ with fluorite structure and larger than that of non-stoichiometric AmO $_{1.73}$ .

Language	:	English
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Meeting title	:	Nuclear Materials Conference 2010 (NuMat 2010)
Held date	:	2010/10
Location (city)	:	Karlsruhe
Location (country)	:	Germany
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Keywords	:	no keyword
Research Facility	:	WASTEF(廃棄物安全試験施設)
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Registration No. : BB20101886
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Heat capacities and thermal conductivities of AmO and AmO

Heat capacities and thermal conductivities of AmO $_{2}$ and AmO $_{1.5}$