An Evaluation of the thermophysical properties of stoichiometric CeO in comparison to UO and PuO

Nelson, A. T.*; Rittman, D. R.*; White, J. T.*; Dunwoody, J. T.*; 加藤 正人; McClellan, K. J.*

Journal of the American Ceramic Society, 97(11), p.3652 - 3659, 2014/11

https://doi.org/10.1111/jace.13170

The thermal conductivity of stoichiometric CeO was determined through measurement of thermal expansion from 313 to 1723 K, thermal diffusivity from 298 to 1473 K, and specific heat capacity from 313 to 1373 K. The thermal conductivity was then calculated as the product of the density, thermal diffusivity, and specific heat capacity. The thermal conductivity was found to obey an (A + BT) relationship with A = 6.776310 mKW and B = 2.79310 mW. Results of thermal expansion and heat capacity measurements agreed well with the limited low-temperature data available in the literature. The thermal conductivity values provided in the current study are significantly higher than the only high-temperature data located for CeO. The CeO data are compared to literature values for UO and PuO.