Effect of Porosity on the Thermal Conductivity of ThO2
- 1 January 1969
- journal article
- Published by Taylor & Francis in Journal of Nuclear Science and Technology
- Vol. 6 (11) , 657-662
- https://doi.org/10.3327/jnst.6.657
Abstract
The eflect of porosity on the thermal conductivity of sintered ThO2 of densities ranging from 90 to 95% of theoretical density was investigated at 20°C. The thermal conductivity was determined by means of laser pulse. Discrepancies were observed between the experimental results and the relation derived by Loeb. This discrepancy was explained by applying a modified Maxwell formula derived by Brailsford et al. The samples were also examined metallographically. It is concluded that the existence of fluid continuous regions contribute significantly to the thermal resistance of such materials as ThO2.Keywords
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