Abstract
In order to mimic the loading of americium (Am) and curium (Cm) oxide in yttria stabilized zirconia, Zr0.70 [Y1-xNdx]0.30O1.85 (0.0 ≤ x ≤ 1.0) system was synthesized by solid state route and characterized by X-ray diffraction (XRD) and Raman spectroscopy. The entire system appeared single-phasic fluorite-type by XRD. However, Raman spectroscopy revealed the existence of tetragonal domains for the Nd-rich composition, Zr0.70Nd0.30O1.85 (x = 1.0). Bulk thermal expansion coefficient was found to increase with increasing NdO1.5 content in this series in the temperature range 298–1473 K. The heat capacity of sintered samples was measured by heat flux-type differential scanning calorimeter over the temperature range 313–713 K and it was observed to decrease with increasing Nd3+-content. Thermal conductivity values were determined from measured thermal diffusivity, temperature dependent density and specific heat capacity values. The thermal conductivity of Nd3+ stabilized zirconia was lower than yttria stabilized zirconia.
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