Thermodynamic properties and X-ray diffraction of Bi4Ti3O12

被引：0
|
作者：
A. V. Knyazev
O. V. Krasheninnikova
N. N. Smirnova
A. N. Shushunov
E. V. Syrov
A. G. Blokhina
机构：
[1] N. I. Lobachevsky State university of Nizhni Novgorod,
来源：
Journal of Thermal Analysis and Calorimetry | 2015年 / 122卷
关键词：
Perovskite; Aurivillius phase; Adiabatic vacuum calorimetry; Heat capacity; Thermodynamic functions, thermal deformation model;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The temperature dependence of heat capacity of Bi4Ti3O12 has been measured for the first time in the range from 7 to 346 K by precision adiabatic vacuum calorimetry. The experimental data were used to calculate standard thermodynamic functions, namely the heat capacity, enthalpy Ho(T) − Ho(0), entropy So(T) − So(0), and Gibbs function Go(T) − Ho(0), in the range from T → 0 to 346 K. The structure of Bi4Ti3O12 is refined by the Rietveld method (space group Fmmm, Z = 4) at temperatures of 173, 273, 373, 473 K. Thermal deformation model is proposed on the basis of structural data.
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页码：747 / 754
页数：7
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