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.
Similar content being viewed by others
References
Chidambaram R. In: Srinivasan M, Kimura I, editors. Proceedings of the Indo-Japan seminar on thoria utilization, Indian nuclear society and atomic energy society of Japan, Bombay, India; 1990, p. 7.
Stanculescu A. Thorium fuel utilization: options and trends, IAEA TECDOC 1319, Vienna; 2002.
Stanculescu A. Potential of thorium based fuel cycles to constrain plutonium and reduce long lived waste toxicity, IAEA TECDOC 1349, Vienna; 2003.
F. Sokolov, K. Fukuda, H.P. Nawada. Thorium fuel cycle—potential benefits and challenges, IAEA TECDOC 1450, Vienna; 2005.
Panneerselvam G, Antony MP, Vasudevan T. A study on ThO2–LaO1.5 solid solution: synthesis, characterization and estimation of solubility of LaO1.5 in ThO2 at 1473 K. Mater Lett. 2004;58:3192–6.
Mathews MD, Ambekar BR, Tyagi AK. Lattice thermal expansion studies of Th1−x NdxO2−x/2 solid solutions. Ceram Int. 2006;32:609–12.
Mathews MD, Ambekar BR, Tyagi AK. Phase relations and linear thermal expansion of cubic solid solutions in the Th1−xMxO2−x/2 (M = Eu, Gd, Dy) systems. J Nucl Mater. 2005;341:19–24.
Tyagi AK, Mathews MD, Ramachandran R. Solubility limits and bulk thermal expansion of ThO2:Mn+ (M = Y3+, Sr2+ and Ba2+). J Nucl Mater. 2001;294:198–201.
Panneerselvam G, Antony MP, Vasudevan T. Studies on lattice thermal expansion and XPS of ThO2 – NdO1.5 solid solutions. Thermochim Acta. 2006;443:109–15.
Sinha RK, Kakodkar A. Design and development of the AHWR –the Indian thorium fuelled innovative reactor. Nucl Engg Des. 2006;236:683–700.
Crouch, EAC. Atomic data and nuclear data tables: fission product yields from neutron induced fission. New York and London: Academic Press; 1977. Vol. 19.
Brauer G, Willaredt B. Mixed crystal phases in the system ThO2–PrOx. J Less Common Metals. 1971;24:311–6.
Venkata Krishnan R, Nagarajan K. Heat capacity measurements on uranium–cerium mixed oxides by differential scanning calorimetry. Thermochim Acta. 2006;440:141–5.
Venkata Krishnan R, Mittal VK, Babu R, Senapati A, Bera S, Nagarajan K. Heat capacity measurements and XPS studies on uranium-lanthanum mixed oxides. J Alloys Compd. 2011;509:3229–37.
Venkata Krishnan R, Nagarajan K, Vasudeva Rao PR. Heat capacity measurements on BaThO3 and BaCeO3. J Nucl Mater. 2001;299:29–31.
Knacke O, Kubaschewski O, Hesselmann K, editors. Thermochemical properties of inorganic substances. Berlin: Springer-verlag; 1991.
Hayashi H, Kanoh M, Quan CJ, Inaba H, Wang S, Kokiya M, Tagawa H. Solid State Ionics. 2000;132:227–33.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
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
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10973-014-3896-y