Thermodynamic Properties of Y2Ti2O7 and Eu2Ti2O7 in the Temperature Range 7-1800 K

被引：2

作者：

Gagarin, P. G. ^{[1
]}

Gus'kov, A. V. ^{[1
]}

Khoroshilov, A. V. ^{[1
]}

Gus'kov, V. N. ^{[1
]}

Kondrat'eva, O. N. ^{[1
]}

Ryumin, M. A. ^{[1
]}

Nikiforova, G. E. ^{[1
]}

Gavrichev, K. S. ^{[1
]}

机构：

[1] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2024年 / 98卷 / 09期

关键词：

titanates; yttrium; europium; pyrochlore; heat capacity; thermodynamics; HEAT-CAPACITY; PYROCHLORE; CONDUCTIVITY;

D O I：

10.1134/S0036024424700973

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The temperature dependence of the heat capacity of Y2Ti2O7 and Eu2Ti2O7 with a pyrochlore structure in the temperature range of 7-1800 K has been studied. The existence of a small shallow anomaly of the heat capacity of europium titanate in the range of 10-60 K was confirmed. The thermodynamic properties (entropy, enthalpy change, and reduced Gibbs energy) were calculated. Based on the results of calculation of the Gibbs energy of formation of the titanates from oxides it was concluded that both titanates are thermodynamically stable in the high temperature region.

引用

页码：1883 / 1894

页数：12

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