Electrochemical determination of the Gibbs energy of formation of MgAl2O4

被引：0
|
作者：
Jacob, KT [1 ]
Jayadevan, KP
Waseda, Y
机构：
[1] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India
[2] Indian Inst Sci, Dept Met, Bangalore 560012, Karnataka, India
[3] Tohoku Univ, Inst Adv Mat Proc, Sendai, Miyagi 980, Japan
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1998年 / 81卷 / 01期
关键词：
D O I：
暂无
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The standard Gibbs energy of formation of the spinel MgAl2O4 from component oxides, MgO and alpha-Al2O3, has been determined in the temperature range 900 to 1250 K using a solid-state cell incorporating single-crystal CaF2 as the solid electrolyte. The cell can be represented as [GRAPHICS] The standard Gibbs energy of formation from binary oxides, computed from the reversible emf, can be represented by the expression Delta G(f,ox)degrees = -23600 - 5.91T (+/-150) J/mol The "second-law" enthalpy of formation of MgAl2O4 obtained in this study is in good agreement with high-temperature solution calorimetric studies reported in the literature.
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页码：209 / 212
页数：4
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