Kinetics and mechanism of zinc ferrite formation |
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| Authors: | G.A. Kolta S.Z. El-Tawil A.A. Ibrahim N.S. Felix |
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| Affiliation: | Metallurgical Department, National Research Centre, Dokki, Cairo Egypt |
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| Abstract: | The kinetics and mechanism of zinc ferrite formation are studied for pure oxide mixtures at temperatures up to 1000°C by X-ray analysis, DTA and chemical analysis. Formation of ferrite obeys a random nucleation equation with an activation energy of 29.4 kcal mole?1 in the temperature range 635–780°C. The nucleation process is followed by formation of spinel in an ordered lattice at temperatures /s> 800°C. The possibility of ZnO dissolution in the ferrite is also considered for ZnO at ratios higher than equimolecular. |
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