Synthesis and High-Temperature Heat Capacity of Y 2 Ge 2 O 7

L. T. Denisova; L. A. Irtyugo; Yu. F. Kargin; V. V. Beletskii; V. M. Denisov

doi:10.1134/S003602361803004X

Synthesis and High-Temperature Heat Capacity of Y₂Ge₂O₇

Authors: Denisova L.T.¹, Irtyugo L.A.¹, Kargin Y.F.², Beletskii V.V.¹, Denisov V.M.¹
Affiliations:
1. Siberian Federal University
2. Baikov Institute of Metallurgy and Material Science
Issue: Vol 63, No 3 (2018)
Pages: 361-363
Section: Physical Methods of Investigation
URL: https://journal-vniispk.ru/0036-0236/article/view/168521
DOI: https://doi.org/10.1134/S003602361803004X
ID: 168521

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Abstract

Yttrium germanate Y₂Ge₂O₇ was prepared by solid-phase synthesis from a stoichiometric Y₂O₃–GeO₂ mixture under multistage calcination in air within a temperature range of 1273–1473 K. The molar heat capacity of polycrystalline samples was measured by differential scanning calorimetry (DSC), and the C_P = f(T) dependence was used to calculate the thermodynamic properties of yttrium digermanates, such as the enthalpy and entropy changes and the reduced Gibbs energy.