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Reducibility and magnetic properties of nanosized ZnO substituted Fe2O3/TiO2 system

Pure Fe 2 O 3 and TiO 2 powder were mixed in molar ratio and fired in a muffle furnace at 1200°C for 4 h. The Fe 2 TiO 5 compound formed was doped by replacing TiO 2 with calculated amounts of ZnO (ZnO fractions x=0·2, 0·4, 0·6, 0·8 and 1). The synthesised samples were characterised with X-ray diffr...

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Bibliographic Details
Published in:Materials technology (New York, N.Y.) N.Y.), 2008-03, Vol.23 (1), p.39-44
Main Authors: Bahgat, M., Khedr, M. H., Abdelmaksoud, H. S.
Format: Article
Language:English
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Summary:Pure Fe 2 O 3 and TiO 2 powder were mixed in molar ratio and fired in a muffle furnace at 1200°C for 4 h. The Fe 2 TiO 5 compound formed was doped by replacing TiO 2 with calculated amounts of ZnO (ZnO fractions x=0·2, 0·4, 0·6, 0·8 and 1). The synthesised samples were characterised with X-ray diffraction (XRD) and their magnetic properties were measured using a vibrating sample magnetometer. Fe 2 TiO 5 , 2FeZnTiO 4 , Fe 2 ZnTi 3 O 10 , ZnTiO 3 and ZnFe 2 O 4 phases were detected with very low magnetic properties corresponding to dilute magnetic semiconductors. Reduction tests in hydrogen at 500°C showed the reducibility of the undoped compound to be very low and to increase gradually with increasing Zn content in the ferrite phase. The reduction process caused a pronounced change in the magnetic properties.
ISSN:1066-7857
1753-5557
DOI:10.1179/175355508X266854