| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Effect of Porous Structure on the Magnetic Properties of NixMgyZn1−x-yFe2O4 Magnetic Materials |
| QI Xin1, ZHOU Xin1, SHU Di1, ZHAO Jing-Jing1, WANG Wei1, CHEN Juan2**
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1Department of Physics and Electronics, Beijing University of Chemical Technology, Beijing 100029
2Department of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029
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| Cite this article: |
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QI Xin, ZHOU Xin, SHU Di et al 2011 Chin. Phys. Lett. 28 107502 |
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Abstract We deal with the preparation of NiMgZnFeIII−SO4 layered double hydroxides (LDHs) with the layered precursor method and introduce excessive ZnO into the NiMgZnFeIII−SO4 LDHs to produce NixMgyZn1−x-yFe2O4 ferrites that contain massive ZnO. Then the NixMgyZn1−x-yFe2O4 ferrites are treated with NaOH solution to remove ZnO to produce the porous NixMgyZn1−x-yFe2O4 magnetic material: when y=0, porous NiZnFe2O4 ferrite magnetic materials are obtained; when y≠0, porous NiMgZnFe2O4 ferrite magnetic materials are obtained. From analyses of these two ferrites, their pore−forming mechanism and comparison of their properties before and after they undergo the alkali treatment, we find that after being treated by the NaOH solution, NiZnFe2O4/ NiMgZnFe2O4 have better uniform-structure pores, which will greatly expand their pore volume, widen their application scope and improve their magnetic properties.
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| Keywords:
75.50.Dd
75.50.Gg
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Received: 10 June 2011
Published: 28 September 2011
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