Kinetics of lanthanum oxide sulfurization in ammonium rhodanide vapor

被引：7

作者：

Sotnikov, A. V. ^{[1
]}

Bakovets, V. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, Novosibirsk 630090, Russia

来源：

INORGANIC MATERIALS | 2014年 / 50卷 / 12期

关键词：

We have studied the kinetics of phase formation in the La-O-S system during La2O3 sulfurization in ammonium rhodanide vapor and identified the sequence of transformations of the La2O2S2; La2O2S; and La2S3 phases in the temperature range 600-900°C. The kinetic curves for the reactions involved were fitted by the Jander equation with a correlation coefficient R 2 = 0.99. We have calculated the reaction rate constants; pre-exponential factors; and effective activation energies for the formation of the above compounds: E a(La2O2S2) = 22.35 ± 3.32 kJ/mol; E a(La2O2S) = 57.67 ± 0.91 kJ/mol; and E a(La2S3) = 45.88 ± 1.16 kJ/mol. © 2014 Pleiades Publishing; Ltd;

D O I：

10.1134/S002016851412019X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the kinetics of phase formation in the La-O-S system during La2O3 sulfurization in ammonium rhodanide vapor and identified the sequence of transformations of the La2O2S2, La2O2S, and La2S3 phases in the temperature range 600-900A degrees C. The kinetic curves for the reactions involved were fitted by the Jander equation with a correlation coefficient R (2) = 0.99. We have calculated the reaction rate constants, pre-exponential factors, and effective activation energies for the formation of the above compounds: E (a)(La2O2S2) = 22.35 +/- 3.32 kJ/mol, E (a)(La2O2S) = 57.67 +/- 0.91 kJ/mol, and E (a)(La2S3) = 45.88 +/- 1.16 kJ/mol.

引用

页码：1212 / 1216

页数：5