High-temperature heat capacity and thermodynamic properties of TbBiGeO5 and DyBiGeO5

被引：2

作者：

Denisova, L. T. ^{[1
]}

Kargin, Yu. F. ^{[2
]}

Belousova, N. V. ^{[1
]}

Denisov, V. M. ^{[1
]}

Galiakhmetova, N. A. ^{[1
]}

Golubeva, E. O. ^{[1
]}

机构：

[1] Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Svobodnyi Pr 79, Krasnoyarsk 660041, Russia

[2] Russian Acad Sci, Baikov Inst Met & Mat Sci, Leninskii Pr 49, Moscow 119991, Russia

来源：

INORGANIC MATERIALS | 2017年 / 53卷 / 10期

关键词：

bismuth terbium and bismuth dysprosium germanates; high-temperature heat capacity; thermodynamic properties; CRYSTALS; BI2GEO5;

D O I：

10.1134/S0020168517100041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline TbBiGeO5 and DyBiGeO5 samples have been prepared by solid-state reactions, by firing stoichiometric mixtures of Tb2O3 (Dy2O3), Bi2O3, and GeO2 in air at 1003, 1073, 1123, 1143, 1173, and 1223 K. The molar heat capacity of the bismuth terbium and bismuth dysprosium germanates has been determined by differential scanning calorimetry. The experimental C-p (T) data obtained in the range 350-1000 K have been used to evaluate the thermodynamic functions of the synthesized oxide compounds: enthalpy increment, entropy change, and reduced Gibbs energy.

引用

页码：1086 / 1090

页数：5

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