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| Several W-type Barium Ferrites with Different Me2 : Preparation and the Electromagnetic Properties |
| WU Yanfei, HUANG Ying, ZHANG Yinling, NIU Lei |
| Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi’an 710129 |
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Cite this article:
WU Yanfei HUANG Ying ZHANG Yinling NIU Lei. Several W-type Barium Ferrites with Different Me2 : Preparation and the Electromagnetic Properties. Chin J Mater Res, 2011, 25(6): 607-612.
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Abstract The W–type ferrites, BaMe2 Fe16O27, were prepared by sol–gel method. The performances of the ferrites were improved by changing the Me2(Co2, CoNi, CoZn). The structures, morphologies, magnetic properties and microwave absorption properties of the samples were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), vibrating sample magnetometer (VSM) and Vector network analyzer. According the SEM observations, it is found that all the ferrites showed a hexagonal platelet–like shape. The XRD results indicated that all the samples were W-type ferrite. The synthesized samples exhibited paramagnetism and strong magnetism. Besides, the composite, which was blend with paraffin BaCoZnFe16O27/paraffin, has a better microwave absorbing property than the other
ferrites. Moreover, the reflection loss of one–layer absorber with the BaCoZnFe16O27 sample was calculated. The band width (with respect to −10 dB reflection loss) is 5.42 GHz at a matching thickness of 3.50 mm and the maximal reflection loss is −16.23 dB.
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Received: 22 March 2011
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| Fund: Supported by Aerospace Science and Technology Innovation Foundation No.N9XT0001 and Space SupportTechnology Foundation No.N8XW0002. |
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