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Heat capacity and thermal expansion of yttrium tantalate
- Authors: Khoroshilov A.V.1, Ashmarin A.A.1, Guskov V.N.1, Sazonov E.G.2, Gavrichev K.S.1, Novotortsev V.M.1
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Affiliations:
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences
- LLC “Technological systems of protective coatings”
- Issue: Vol 484, No 2 (2019)
- Pages: 181-183
- Section: Physical chemistry
- URL: https://journals.eco-vector.com/0869-5652/article/view/11723
- DOI: https://doi.org/10.31857/S0869-56524842181-183
- ID: 11723
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Abstract
The isobaric heat capacities of two monoclinic (M' and M) modifications of yttrium orthotantalate at temperatures 5–1300 K have been measured by the adiabatic and differential scanning calorimetry methods. It has been demonstrated that the difference in structure between the crystal lattices of M' and M has small effect in the heat capacity, and the difference between the heat capacities of these phases Cp(M)−Cp(M') is small, always positive, and increases in the range of the lowest temperatures. The unit cell parameters of M-YTaO4 have been determined as a function of temperature in the range 300–1173 K.
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About the authors
A. V. Khoroshilov
Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences
Author for correspondence.
Email: guskov@igic.ras.ru
Russian Federation, Moscow
A. A. Ashmarin
Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences
Email: guskov@igic.ras.ru
Russian Federation, Moscow
V. N. Guskov
Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences
Email: guskov@igic.ras.ru
Russian Federation, Moscow
E. G. Sazonov
LLC “Technological systems of protective coatings”
Email: guskov@igic.ras.ru
Russian Federation, Moscow
K. S. Gavrichev
Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences
Email: guskov@igic.ras.ru
Russian Federation, Moscow
V. M. Novotortsev
Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences
Email: guskov@igic.ras.ru
Russian Federation, Moscow
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