简介概要

Dielectric, magnetic and microwave absorbing properties of polyaniline-Co0.7Cr0.1Zn0.2Fe2O4 composites

来源期刊:Rare Metals2017年第2期

论文作者:Rui-Ting Ma Huai-Yu Shang Xiao Wang Dan Jiang

文章页码:118 - 122

摘    要:The spinel cobalt chromium zinc ferrites(Co0.7Cr0.1Zn0.2Fe2O4) and the polyaniline(PANI)-(Co0.7Cr0.1Zn0.2Fe2O4 composites were prepared by polyacrylamide gel and an in situ polymerization method,respectively.The structure of the synthesized material was characterized by X-ray diffraction(XRD) and Fourier transform infrared spectrometer(FTIR),which shows that the spinel Co0.7Cr0.1Zn0.2Fe2O4 ferrites and the PANICo0.7Cr0.1Zn0.2Fe2O4 composites are obtained.As a small amount of Co2+ in the octahedron ferrite is replaced by Cr3+,the lattice constant of Co0.8Zn0.2Fe2O4 ferrites reduces from0.8409 to 0.8377 nm.The magnetic properties of the two materials were investigated by vibrating sample magnetometer(VSM).The VSM results confirm that the saturation magnetization(Ms),remanent magnetization(Mr) and coercive force(Hc) of the PANI-Co0.7Cr0.1Zn0.2Fe2O4composites are 8.80 mA·m2·g-1,3.14 mA·m2·g-1 and37.22 kA·m-1,respectively,which are smaller than those of the Co0.7Cr0.1Zn0.2Fe2O4 ferrites.The microwave absorbing capability of the two materials was studied by waveguide method.In the frequency range of 5-20 GHz,two reflection loss maximum values of the PANI-Co0.7Cr0.1Zn0.2Fe2O4composites appear at 14.1 and 17.9 GHz with-13.17 and-15.36 dB,respectively,which are obviously higher than those of the Co0.7Cr0.1Zn0.2Fe2O4 ferrites.

详情信息展示

Dielectric, magnetic and microwave absorbing properties of polyaniline-Co0.7Cr0.1Zn0.2Fe2O4 composites

Rui-Ting Ma,Huai-Yu Shang,Xiao Wang,Dan Jiang

School of Materials Science and Engineering,Shenyang Ligong University

摘 要:The spinel cobalt chromium zinc ferrites(Co0.7Cr0.1Zn0.2Fe2O4) and the polyaniline(PANI)-(Co0.7Cr0.1Zn0.2Fe2O4 composites were prepared by polyacrylamide gel and an in situ polymerization method,respectively.The structure of the synthesized material was characterized by X-ray diffraction(XRD) and Fourier transform infrared spectrometer(FTIR),which shows that the spinel Co0.7Cr0.1Zn0.2Fe2O4 ferrites and the PANICo0.7Cr0.1Zn0.2Fe2O4 composites are obtained.As a small amount of Co2+ in the octahedron ferrite is replaced by Cr3+,the lattice constant of Co0.8Zn0.2Fe2O4 ferrites reduces from0.8409 to 0.8377 nm.The magnetic properties of the two materials were investigated by vibrating sample magnetometer(VSM).The VSM results confirm that the saturation magnetization(Ms),remanent magnetization(Mr) and coercive force(Hc) of the PANI-Co0.7Cr0.1Zn0.2Fe2O4composites are 8.80 mA·m2·g-1,3.14 mA·m2·g-1 and37.22 kA·m-1,respectively,which are smaller than those of the Co0.7Cr0.1Zn0.2Fe2O4 ferrites.The microwave absorbing capability of the two materials was studied by waveguide method.In the frequency range of 5-20 GHz,two reflection loss maximum values of the PANI-Co0.7Cr0.1Zn0.2Fe2O4composites appear at 14.1 and 17.9 GHz with-13.17 and-15.36 dB,respectively,which are obviously higher than those of the Co0.7Cr0.1Zn0.2Fe2O4 ferrites.

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