Investigation of the non-isothermal kinetics of the formation of ZnFe2O4 and ZnCr2O4

被引：13

作者：

Konvicka, T ^{[1
]}

Mosner, P

Solc, Z

机构：

[1] Univ Pardubice, Fac Chem Technol, Dept Inorgan Technol, Pardubice 53210, Czech Republic

[2] Univ Pardubice, Fac Chem Technol, Dept Gen & Inorgan Chem, Pardubice 53210, Czech Republic

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2000年 / 60卷 / 02期

关键词：

activation energy of ZnFe2O4; pigments; spinels; study of kinetic models; zinc ferrite; ZnCr2O4; formation;

D O I：

10.1023/A:1010115625642

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The kinetics of ZnFe2O4 and ZnCr2O4 formation under non-isothermal conditions using DTA is discussed. It was determined activation energy and kinetic model for studied reactions in the case of used various sources of starting materials (ferric pigments, chromic oxides). The activation energies for ZnFe2O4 are positioned in a range of 200-475 kJ mol(-1) (in dependence of used ferric pigments) and in case of ZnCr2O4 in a range of 130-160 kJ mol(-1). The autocatalytic kinetic model (Sestak-Berggren) was found to be the most convenient description of the studied processes.

引用

页码：629 / 640

页数：12

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