期刊
CERAMICS INTERNATIONAL
卷 42, 期 14, 页码 15183-15188出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.06.120
关键词
Sol-gel processing; Magnetic properties; Ferrites; Spinels
资金
- Coordination of Improvement of Higher Level Personnel (Capes)
- Support Program for Excellence Centers of the Foundation for Research Support of the State of Rio Grande do Sul (PRONEX/FAPERGS)
We herein report a study on the sol-gel synthesis of CoFe2O4 and the effect of thermal treatment on the product outcome. Xerogels treated at 750, 800 and 850 degrees C had their structural and magnetic properties thoroughly studied, in order to correlate their synthesis conditions to the positions in which the cations are inserted in the spinel structure. X-ray diffractograms exhibit reflections representative of the spinel structure and demonstrate that the thermal treatment does not affect the lattice parameters of the material. Mossbauer spectroscopy studies indicate a very low inversion degree in the synthesized spinels, which is very unusual for CoFe2O4. A maximum in coercivity of 1405.2 Oersted was achieved for the sample treated at 800 degrees C. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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