聚苯胺/Co_(0.5)Zn_(0.5)La_(0.1)Fe_(1.9)O_4复合材料的表征及电磁损耗

Characterization and Electromagnetic Properties of Polyaniline/Co_(0.5)Zn_(0.5)La_(0.1)Fe_(1.9)O_4 Composites

采用原位聚合法制备聚苯胺(Pani)/复合材料,使用X射线衍射仪(XRD)、扫描电子显微镜(TEM)和紫外可见吸收光谱(UV-vis)对复合材料进行了表征。XRD结果表明样品为纯Pani和Pani/Co0.5Zn0.5La0.1Fe1.9O4复合材料,SEM照片可知,纯Pani和Pani/Co0.5Zn0.5La0.1Fe1.9O4粒子的平均粒径分别约为150 nm和500 nm,UV-vis光谱表明Pani/Co0.5Zn0.5La0.1Fe1.9O4苯环上的π-π*和n-π*分别红移了13 nm和10 nm.在8.2-12.4GHz测试频率范围内,Pani/Co0.5Zn0.5La0.1Fe1.9O4复合材料的介电损耗角正切(tgε)在0.22-0.34之间,磁损耗正切(tgμ)在0.27-0.35之间.

Polyaniline（Pani）/Co0.5Zn0.5La0.1Fe1.9O4 composite was synthesized by an in situ polymerization.The composites were characterized by using X-ray diffraction（XRD）,transmission electron microscopy（TEM） and Ultraviolet-visible spectrometer（UV-vis）.The results of XRD confirm the formation of Pani/Co0.5Zn0.5La0.1Fe1.9O4 composite.The average particle sizes of the pure Pani and Pani/Co0.5Zn0.5La0.1Fe1.9O4 composites are estimated to be about 150nm and 500nm by SEM,respectively.The UV-vis spectrometer study showed that the absorption peaks of Pani/Co0.5Zn0.5La0.1Fe1.9O4 composite had a red shift of 13nm and 10nm,respectively,as compared with that of Pani.The complex permittivity（ε′-jε〞） and complex permeability（μ′-jμ〞） of the composites obtained were measured using vector network analyzer of HB8510B from 8.2 to 12.4GHz.The results show that Pani/Co0.5Zn0.5La0.1Fe1.9O4 composite has both dieletric loss and magnetic loss.The dielectric loss tangent（tanε=ε＂/ε′）and magnetic loss tangent（tanμ=μ＂/μ′） values of Pani/Co0.5Zn0.5La0.1Fe1.9O4 composite are in the range of 0.22～0.34 and 0.27-0.35,respectively.