Abstract
The formation of zinc ferrite from zinc oxide and iron oxide is evaluated with high temperature X-ray diffraction experiments. Despite the problem of accurately determining the temperature of the part of the sample actually investigated, a kinetic analysis of the isothermal formation is shown to be possible. From these data the energy and entropy of activation are derived. It is further shown that neither corrections for grain growth during formation nor the presence of impurities have any influence on these results. On the other hand, the size of the reactant iron oxide particles is found to have a strong influence on both the energy and entropy of activation.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
F. J. C. M. Toolenaar andM. T. J. Verhees,J. Mater. Sci. 23 (1988) 256.
H. P. Klug andL. E. Alexander, “X-ray Diffraction Procedures” (Wiley, New York, 1954).
W. Jander,Z. anorg. u. algem. Chem. 163 (1927) 1.
R. E. Carter,J. Chem. Phys. 34 (1961) 2010.
K. J. Laidler, “Chemical Kinetics” 2nd edn (McGraw-Hill, New York, 1965), p. 89.
A. M. Ginstling andB. I. Brounshtein,J. Appl. Chem. USSR 23 (1950) 1327.
J. F. Duncan andD. J. Stewart,Trans. Farad. Soc. 63 (1967) 1031.