Thermal Conductivity of Ceramic Solid Solutions

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概要

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• The thermal conductivity of THO<SUB>2</SUB>-UO<SUB>2</SUB> and THO<SUB>2</SUB>-CeO<SUB>2</SUB> systems were measured by laser flash method, and the results are discussed with the aid of the relaxation-time theory. Two param-eters characteristic to systems of the same base - the ratio α of scattering rates between N- and U-scatterings and the strain parameter ε - were determined experimentally from the measured thermal conductivity of the THO<SUB>2</SUB>-UO<SUB>2</SUB> system at 25°C. Using these parameters, the thermal conductivities of THO<SUB>2</SUB>-UO<SUB>2</SUB> system at 100° and 500°C and that of THO<SUB>2</SUB>-CeO<SUB>2</SUB> at 25°C were calculated. The results obtained agree very well with the experimental values.<BR>In the THO<SUB>2</SUB>-UO<SUB>2</SUB> system, the predominant contribution to the scattering cross section of phonons is the strain factor, while in the THO2-CeO2 system, the contribution from the mass factor increases, which makes the thermal resistivity of the THO<SUB>2</SUB>-CeO<SUB>2</SUB> system higher than that of the THO<SUB>2</SUB>-UO<SUB>2-</SUB>

• 一般社団法人 日本原子力学会の論文

著者

• Murabayashi Masayuki

  Department of Environmental Chemistry, Institute of Environmental Science and Technology, Yokohama N

関連論文

• Thermodynamic Modelling and Photodegradation of Some Pesticides
• Thermal Conductivity and Heat Capacity of Zircaloy-2, -4 and Unalloyed Zirconium
• Thermal Conductivity of ThO2-UO2 System
• Effect of Porosity on the Thermal Conductivity of ThO2
• Thermal Conductivity of Ceramic Solid Solutions

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