期刊
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
卷 64, 期 10, 页码 1265-1281出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0036023619100048
关键词
lanthanide zirconates; calorimetry; heat capacity; thermodynamic functions
资金
- Russian Foundation for Basic Research [15-03-04388]
The review of the thermodynamic properties of complex lanthanide-zirconium oxides, namely, Ln(2)Zr(2)O(7) (Ln = La, Pr, Sm, Eu, Gd) with a pyrochlore structure and Ln(2)O(3) center dot 2ZrO(2) solid solutions (Ln = Tb, Ho, Er, Tm) with a fluorite structure, is presented on the basis of our and literature data. The heat capacity was experimentally studied for Ln(2)Zr(2)O(7) (for the cerium subgroup lanthanides) with a pyrochlore structure (Fd3m) and Ln(2)O(3) center dot 2ZrO(2) (for the yttrium subgroup lanthanides) with a fluorite structure (Fm3m), which were characterized by X-ray diffraction and elemental analyses, scanning electron microscopy, and adiabatic and differential scanning calorimetry. The temperature dependences of the thermodynamic functions (entropy, enthalpy change, and reduced Gibbs energy) were calculated within a broad range of temperatures from smoothed heat capacity values. The available thermodynamic data were compared, and some recommended values were given. The contribution of low-temperature magnetic transitions was taken into account for Ln(2)Zr(2)O(7) (Ln = Pr, Nd, Sm, Gd). The effect of the Schottky anomaly on the heat capacity of lanthanide compounds was analyzed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据