Thermodynamic Properties of Ytterbium Titanate

被引：0
|
作者：
Guskov, A. V. [1 ]
Gagarin, P. G. [1 ]
Guskov, V. N. [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 / 13期
关键词：
ytterbium titanate; synthesis; thermodynamic functions; Schottky anomaly; SCHOTTKY CONTRIBUTIONS; EARTH; ENTHALPIES; EVOLUTION; ENTROPY; HO; ER; LN;
D O I：
10.1134/S0036024424702467
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 first measurements are made of the isobaric heat capacity of single-phase pyrochlore ytterbium titanate synthesized and studied via XRD, SEM, and EDX in the 2-1869 K range of temperatures. A magnetic transformation at <20 K and a lack of structural transformations throughout the region of Yb2Ti2O7 are confirmed. Thermodynamic functions (entropy, the increment of enthalpy, and the Gibbs free energy of the formation of Yb2Ti2O7 from elements and binary oxides at 298.15 K) are calculated, and the contribution to the heat capacity of the Schottky anomaly is evaluated.
引用
收藏
页码：2952 / 2962
页数：11
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