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

Authors
Konvicka, T Mosner, P Solc, Z
Citation
T. Konvicka et al., Investigation of the non-isothermal kinetics of the formation of ZnFe2O4 and ZnCr2O4, J THERM ANA, 60(2), 2000, pp. 629-640
Citations number
31
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN journal
13886150 → ACNP
Volume
60
Issue
2
Year of publication
2000
Pages
629 - 640
Database
ISI
SICI code
1388-6150(2000)60:2<629:IOTNKO>2.0.ZU;2-Z
Abstract
The kinetics of ZnFe2O4 and ZnCr2O4 formation under non-isothermal conditio ns 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 Z nFe2O4 are positioned in a range of 200-475 kJ mol(-1) (in dependence of us ed 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 mos t convenient description of the studied processes.