| Currently, the absorbing material is not only used in military stealth and anti-stealth, combat and against anti-scope, and is widely used in electromagnetic interference television broadcasting, communications and navigation systems, and security information confidential, improve signal to noise ratio, electromagnetic compatibility, and waveguides many civilian areas or coaxial absorption components.In this paper, MnFe2O4 is studied and MnFe2O4/TiO2 and MnFe2O4/ZnO were obtained with good absorbing property by microemulsion method and co-precipitation method, and the material microstructure, the relationship between magnetic properties and absorbing properties are studied. The maximum microwave loss of MnFe2O4/TiO2 obtained by microemulsion method reaches 38.6 dB and bandwidth with the loss above 10 dB is about 4 GHz in the 7.8-11.4 GHz range. The calculated results indicate that MnFe2O4/TiO2 composite have the potentials to be utilized for fabricating electromagnetic wave absorbers.The particle shape of MnFe2O4 sample prepared by microemulsion method is mainly lamellar and that the surface of particles is relative smooth. The size of the block in the picture is below 2 ?m and the distribution of block size is of parity, otherwise the shape of MnFe2O4 obtained by co- precipitation is mainly particle with a good absorbing property.MnFe2O4/TiO2 was obtained by microemulsion method and co-precipitation method. Both of the nano-capsules were pure with good crystallinity and less defect. The maximum microwave loss of MnFe2O4/TiO2 obtained by microemulsion method reaches 38.6 dB and bandwidth with the loss above 10 dB is about 4 GHz in the 7.8-11.4 GHz range, better than the nano-capsule prepared by co-precipitation.MnFe2O4/ZnO was obtained by co-precipitation, and the maximum microwave loss reaches 23 dB and bandwidth with the loss above 10 dB is about 2.3 GHz when the mass ratio is 1/3. It seems that it can be one potential absorbing material. |
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