High-temperature heat capacity of erbium titanate with a pyrochlore structure

L. T. Denisova; A. D. Izotov; Yu. F. Kargin; L. G. Chumilina; V. V. Ryabov; V. M. Denisov

doi:10.1134/S0012501617080012

High-temperature heat capacity of erbium titanate with a pyrochlore structure

Authors: Denisova L.T.¹, Izotov A.D.², Kargin Y.F.³, Chumilina L.G.¹, Ryabov V.V.⁴, Denisov V.M.¹
Affiliations:
1. Siberian Federal University
2. Kurnakov Institute of General and Inorganic Chemistry
3. Baikov Institute of Metallurgy and Materials Science
4. Institute of Metallurgy, Ural Branch
Issue: Vol 475, No 2 (2017)
Pages: 139-141
Section: Physical Chemistry
URL: https://journals.rcsi.science/0012-5016/article/view/153704
DOI: https://doi.org/10.1134/S0012501617080012
ID: 153704

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Abstract

Erbium titanate with a pyrochlore structure has been synthesized by a ceramic method from stoichiometric Er₂O₃–TiO₂ mixtures at 1673–1773 K. The high-temperature heat capacity of Er₂Ti₂O₇ (320–1000 K) has been studied by differential scanning calorimetry. The thermodynamic functions of this oxide compound—enthalpy and entropy changes and reduced Gibbs—have been calculated from the experimental dependence C_P = f(T).