期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 181, 期 6, 页码 1402-1412出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2008.03.003
关键词
breeder material; lithium aluminate; Knudsen effusion method; solid-state galvanic cell; differential scanning calorimetry (DSC); heat capacity; thermodynamic properties
Three ternary oxides LiAl5O8(s), LiAlO2(s) and Li5AlO4(s) in the system Li-Al-O were prepared by solid-state reaction route and characterized by X-ray powder diffraction method. Equilibrium partial pressure of CO2(g) over the three-phase mixtures {LiAl5O8(s)+Li2CO3(s)+5Al(2)O(3)(s)}, {LiAl5O8(s)+5LiAlO(2)(s)+2Li(2) CO3(s)} and {LiAlO2(s)+Li5AlO4(s)+2Li(2)CO(3)(s)} were measured using Knudsen effusion quadrupole mass spectrometry (KEQMS). Solid-state galvanic cell technique based on calcium fluoride electrolyte was used to determine. the standard molar Gibbs energies of formations of these aluminates. The standard molar Gibbs energies of formation of these three aluminates calculated from KEQMS and galvanic cell measurements were in good agreement. Heat capacities of individual ternary oxides were measured from 127 to 868 K using differential scanning calorimetry. Thermodynamic tables representing the values of Delta H-f(0)(298.15 K), S-0(298.15 K) S-0(T), C-p(0)(T) H-0(T) {H-0(T)-H-0(298.15 K)}, G(0)(T) Delta H-f(0)(T) Delta(f)G(0)(T) and free energy function (fef) were constructed using second law analysis and FACTSAGE thermo-chemical database software. (c) 2008 Elsevier Inc. All rights reserved.
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