Thermodynamic stability of the fluorite phase in the CeO2 - CaO - ZrO2 system

被引:5
|
作者
Shelyug, Anna [1 ]
Navrotsky, Alexandra [1 ]
机构
[1] Univ Calif Davis, Peter A Rock Thermochem Lab, Davis, CA 95616 USA
关键词
INERT MATRIX FUEL; YTTRIA; ZIRCONIA; ENTHALPY; CERIA; MICROSTRUCTURE; CONDUCTIVITY; ENERGETICS; SPINEL; UO2;
D O I
10.1016/j.jnucmat.2019.01.043
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The fluorite phase in CeO2 - CaO - ZrO2 is important in nuclear energy and fuel cell applications yet one lacks quantitative evaluation of its composition range and thermodynamic properties. Using experimental thermodynamic data from binary systems ZrO2 - CeO2, CaO - CeO2 and CaO - ZrO2, the present work fitted the enthalpies of mixing to regular solid solution models. The interaction parameters for binary systems are Omega(CeO2-ZrO2) = 49.9 +/- 2.4 kJ mol(-1), Omega(CaO-ZrO2) = -78.0 +/- 16.7 kJ mol(-1) and Omega(CaO-CeO2) = 53.1 +/- 21.5 kJ mol(-1). Enthalpies of transformation of monoclinic zirconia to the cubic fluorite phase (stable at high temperature) and of rocksalt calcia to the hypothetical fluorite phase were constrained by experimental data. Enthalpies of mixing in the ternary CeO2 - CaO - ZrO2 system were calculated from enthalpies of drop solution measured by high temperature oxide melt solution calorimetry for a set of newly synthesized ternary fluorite samples. Comparison of measured values with those predicted from the binary systems using the Kohler equation suggests that the ternary excess term is zero within experimental error. Thus simple equations could be derived for heats of formation, mixing and phase transition in this system which can be used in the future in CALPHAD type calculations of phase equilibria that obtain the extent of fluorite solid solution at different temperatures. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:80 / 85
页数:6
相关论文
共 50 条
  • [31] Characterization of CeO2, ZrO2, and CeZrO2 Crystals on CNT
    Matus, K.
    Lamacz, A.
    Liszka, B.
    ACTA PHYSICA POLONICA A, 2016, 130 (04) : 966 - 968
  • [32] Promoting effect of ZrO2/CeO2 addition on Fe/CaO catalyst for hydrogen gas production in the gasification process
    Soomro, Ahsanullah
    Chen, Shiyi
    Ma, Shiwei
    Sun, Zhao
    Xu, Changchun
    Xiang, Wenguo
    BIOMASS & BIOENERGY, 2020, 142 (142):
  • [33] Thermal Stability and Catalytic Activity of the MnOx–CeO2 and the MnOx–ZrO2–CeO2 Highly Dispersed Materials in the Carbon Monoxide Oxidation Reaction
    E. Yu. Liberman
    B. S. Kleusov
    A. V. Naumkin
    I. V. Zagaynov
    T. V. Konkova
    E. A. Simakina
    A. O. Izotova
    Inorganic Materials: Applied Research, 2021, 12 : 468 - 476
  • [34] Thermal stability of CeO2/ZrO2 multilayer thin films prepared by pulsed laser deposition
    Balakrishnan, G.
    Kuppusami, P.
    Murugesan, S.
    Ghosh, Chanchal
    Ramachandran, Divakar
    Mohandas, E.
    Sastikumar, D.
    TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, 2011, 64 (03) : 297 - 299
  • [35] Thermal stability of CeO2/ZrO2 multilayer thin films prepared by pulsed laser deposition
    G. Balakrishnan
    P. Kuppusami
    S. Murugesan
    Chanchal Ghosh
    Divakar Ramachandran
    E. Mohandas
    D. Sastikumar
    Transactions of the Indian Institute of Metals, 2011, 64 : 297 - 299
  • [36] Nanosized CeO2–SiO2, CeO2–TiO2, and CeO2–ZrO2 Mixed Oxides: Influence of Supporting Oxide on Thermal Stability and Oxygen Storage Properties of Ceria
    Benjaram M. Reddy
    Ataullah Khan
    Catalysis Surveys from Asia, 2005, 9 : 155 - 171
  • [37] Effect of Support on CO Oxidation Performance over the Pd/CeO2 and Pd/CeO2 Zro2 Catalyst
    Li, Hang
    Shen, Meiqing
    Wang, Jianqiang
    Wang, Hui
    Wang, Jun
    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2020, 59 (04) : 1477 - 1486
  • [38] Effect of the ZrO2-Based Solid Solution on the Low-Temperature Phase Stability of ZrO2−Y2O3−CeO2 Materials
    I. O. Marek
    O. V. Dudnik
    S. A. Korniy
    V. P. Redko
    O. K. Ruban
    Powder Metallurgy and Metal Ceramics, 2023, 61 : 727 - 735
  • [39] Effect of Mineralizing Agent on the Phase Composition of Nanocrystalline Powder in the System ZrO2 ― Y2O3 ― CeO2
    Alexey V. Shevchenko
    Elena V. Dudnik
    Alexey K. Ruban
    Viktor P. Red'ko
    Powder Metallurgy and Metal Ceramics, 2002, 41 : 225 - 231
  • [40] Utilization of waste biomass and replacement of stoichiometric reagents for the synthesis of nanocrystalline CeO2, ZrO2 and CeO2-ZrO2
    Muto, A
    Bhaskar, T
    Kaneshiro, Y
    Uddin, MA
    Sakata, Y
    Kusano, Y
    Murakami, K
    GREEN CHEMISTRY, 2003, 5 (04) : 480 - 483