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Navrotsky, Alexandra Lee, Wingyee Mielewczyk-Gryn, Aleksandra Ushakov, Sergey V. Anderko, Andre Wu, Haohan and Riman, Richard E. 2015. Thermodynamics of solid phases containing rare earth oxides. The Journal of Chemical Thermodynamics, Vol. 88, p. 126.
Winder, S.L. Ruggles-Wrenn, M.B. Parthasarathy, T. Key, T. and Carney, C.M. 2015. Thermo-chemical compatibility of hafnium diboride with yttrium aluminum garnet at 1500°C in air. Journal of the European Ceramic Society, Vol. 35, Issue. 9, p. 2437.
Zhang, Lei and Navrotsky, Alexandra 2015. Thermochemistry of rare earth doped uranium oxides LnxU1−xO2−0.5x+y (Ln = La, Y, Nd). Journal of Nuclear Materials, Vol. 465, p. 682.
Zhang, Lei Solomon, Jonathan M. Asta, Mark and Navrotsky, Alexandra 2015. A combined calorimetric and computational study of the energetics of rare earth substituted UO2 systems. Acta Materialia, Vol. 97, p. 191.
Li, Jinping Meng, Songhe Li, Lingling Lu, Hantao and Tohyama, Takami 2014. First-principles generalized gradient approximation (GGA)+Ud+Up studies of electronic structures and optical properties in cubic HfO2. Computational Materials Science, Vol. 81, p. 397.
Navrotsky, Alexandra and Green, D. J. 2014. Progress and New Directions in Calorimetry: A 2014 Perspective. Journal of the American Ceramic Society, Vol. 97, Issue. 11, p. 3349.
Solomon, J.M. Alexandrov, V. Sadigh, B. Navrotsky, A. and Asta, M. 2014. Computational study of the energetics and defect clustering tendencies for Y- and La-doped UO2. Acta Materialia, Vol. 78, p. 282.
Mandal, Saptarshi Long, Branden and Jha, Rashmi 2013. Study of Synaptic Behavior in Doped Transition Metal Oxide-Based Reconfigurable Devices. IEEE Transactions on Electron Devices, Vol. 60, Issue. 12, p. 4219.
Zhou, Wei Ushakov, Sergey V. and Navrotsky, Alexandra 2012. Yttria-stabilized hafnia: Thermochemistry of formation and hydration of nanoparticles. Journal of Materials Research, Vol. 27, Issue. 07, p. 1022.
Mann, Matthew and Kolis, Joseph 2010. Hydrothermal crystal growth of yttrium and rare earth stabilized hafnia. Journal of Crystal Growth, Vol. 312, Issue. 3, p. 461.
Nagata, T. Haemori, M. Yamashita, Y. Yoshikawa, H. Iwashita, Y. Kobayashi, K. and Chikyow, T. 2010. Oxygen migration at Pt/HfO2/Pt interface under bias operation. Applied Physics Letters, Vol. 97, Issue. 8, p. 082902.
Navrotsky, Alexandra 2010. Thermodynamics of solid electrolytes and related oxide ceramics based on the fluorite structure. Journal of Materials Chemistry, Vol. 20, Issue. 47, p. 10577.
Shi, Lei Zhou, Yue Yin, Jiang and Liu, Zhiguo 2010. Characterization upon potential properties of HfO2 stabilized by Y2O3 films as cubic phase. Journal of Applied Physics, Vol. 107, Issue. 1, p. 014104.
Eliziário, S. A. Cavalcante, L. S. Sczancoski, J. C. Pizani, P. S. Varela, J. A. Espinosa, J. W. M. and Longo, E. 2009. Morphology and Photoluminescence of HfO2 Obtained by Microwave-Hydrothermal. Nanoscale Research Letters, Vol. 4, Issue. 11, p. 1371.
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Lu, Chih-Hsin Raitano, Joan M. Khalid, Syed Zhang, Lihua and Chan, Siu-Wai 2008. Cubic phase stabilization in nanoparticles of hafnia-zirconia oxides: Particle-size and annealing environment effects. Journal of Applied Physics, Vol. 103, Issue. 12, p. 124303.
Mazeina, Lena Navrotsky, Alexandra and Greenblatt, Martha 2008. Calorimetric determination of energetics of solid solutions of UO2+x with CaO and Y2O3. Journal of Nuclear Materials, Vol. 373, Issue. 1-3, p. 39.
Chen, Weiqun Navrotsky, Alexandra Xiong, Yue Ping and Yokokawa, Harumi 2007. Energetics of Cerium?Zirconium Substitution in the xCe0.8Y0.2O1.9?(1?x)Zr0.8Y0.2O1.9System. Journal of the American Ceramic Society, Vol. 90, Issue. 2, p. 584.
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The enthalpy of formation of cubic yttria-stabilized hafnia from monoclinic hafnia and C-type yttria was measured by oxide melt solution calorimetry. The enthalpies of formation fit a function independent of temperature and quadratic in composition. The enthalpies of transition from m-HfO2 and C-type YO1.5, to the cubic fluorite phase are 32.5 ± 1.7 kJ/mol and 38.0 ± 13.4 kJ/mol, respectively. The interaction parameter in the fluorite phase is strongly negative, -155.2 ± 10.2 kJ/mol, suggesting even stronger short range order than in ZrO2–YO1.5. Regular solution theory or any other model assuming random mixing on the cation and /or anion sublattice is not physically reasonable. A more complex solution model should be developed to be consistent with the new calorimetric data and observed phase relations.
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