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Thermophysical properties of thorium–praseodymium mixed oxides

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Abstract

Thorium–Praseodymium mixed oxide solid solutions (Th1−yPry)O2−x (y = 0.15, 0.25, 0.4, 0.55) were prepared by co-precipitation method. These mixed oxides form single-phase fluorite solid solutions (fm3m). Heat capacity (C p) measurements and lattice thermal expansion characteristics of these solid solutions were determined with differential scanning calorimeter in the temperature range of 298–800 K and high temperature X-ray diffractometer in the temperature range of 298–2,000 K, respectively. The C p,298 of (Th 1−yPry)O2−x pertaining to the solid solutions with the compositions, y = 0.15, 0.25, 0.4, and 0.55, were found to be 65.2, 62.4, 60.1, and 57.1 J K−1 mol−1, respectively. The coefficients of lattice thermal expansion in the temperature range of 298–2,000 K of (Th1−yPry)O2−x for these solid solutions with the compositions y = 0.15, 0.25, 0.4, and 0.55 were found to be 16.97, 20.43, 25.63 and 30.82 × 10−6 K−1, respectively.

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Authors and Affiliations

  1. Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India

    G. Panneerselvam, R. Venkata Krishnan, K. Ananthasivan & M. P. Antony

  2. Irradiated Fuels Studies Section, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India

    M. P. Antony

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  1. G. Panneerselvam
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  2. R. Venkata Krishnan
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  3. K. Ananthasivan
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  4. M. P. Antony
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Correspondence to M. P. Antony.

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Panneerselvam, G., Venkata Krishnan, R., Ananthasivan, K. et al. Thermophysical properties of thorium–praseodymium mixed oxides. J Therm Anal Calorim 117, 1097–1104 (2014). https://doi.org/10.1007/s10973-014-3896-y

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  • DOI: https://doi.org/10.1007/s10973-014-3896-y

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