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Microwave Absorbing and Magnetic Properties of the Polyaniline-Co0.7Cr0.1Zn0.2Fe2O4 Composites |
Ruiting MAJIANGDan**( ),Xiao WANG,Haitao ZHAO |
School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China |
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Cite this article:
Ruiting MA,Xiao WANG,Haitao ZHAO. Microwave Absorbing and Magnetic Properties of the Polyaniline-Co0.7Cr0.1Zn0.2Fe2O4 Composites. Chinese Journal of Materials Research, 2015, 29(8): 622-626.
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Abstract The spinel cobalt chromium zinc ferrites (Co0.7Cr0.1Zn0.2Fe2O4) and composites of polyaniline(PANI)-Co0.7Cr0.1Zn0.2Fe2O4 were prepared by polyacrylamide gel and in situ polymerization method, respectively, and then the synthesized materials were characterized by X-ray diffraction (XRD) and Fourier transform infrared spectrometer (FT-IR), their magnetic properties were measured using vibrating sample magnetometer (VSM) and their microwave absorbing capability was investigated by wave-guide method. The results show that the spinel Co0.7Cr0.1Zn0.2Fe2O4 ferrites and the composites PANI-Co0.7Cr0.1Zn0.2Fe2O4 are acquired. Because a small amount Co2+ ion of the octahedron ferrite is replaced by Cr3+ ions, the lattice constant of the Co0.8Zn0.2Fe2O4 ferrite reduces from 0.8409 nm to 0.8377 nm. The saturation magnetization (Ms), remanent magnetization (Mr) and coercive force (Hc) of the PPy-Co0.7Cr0.1Zn0.2Fe2O4 composites are 8.80 emug-1, 3.14 emug-1 and 37.22 kAm-1, respectively, which are smaller than that of the Co0.7Cr0.1Zn0.2Fe2O4 ferrite. In a measuring frequency range of 5.0-20.0 GHz, two peak values of reflection loss for the composites PPy-Co0.7Cr0.1Zn0.2Fe2O4 appear at 14.1 GHz and 17.9 GHz with -13.17 dB and -15.36 dB, respectively, which is obviously higher than those of the Co0.7Cr0.1Zn0.2Fe2O4 ferrite.
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Received: 27 November 2014
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Fund: Supported by National Science Foundation of Liaoning Province No.2014020094. |
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