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纳米Fe3O4及Fe3O4-SrFe12O19吸波复合材料的制备及性能

, PP. 130-134

Keywords: 共沉淀法,超顺磁性,Fe3O4-SrFe12O19,磁性能,吸波性能

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Abstract:

采用共沉淀法成功制备出具有超顺磁性的纳米Fe3O4,并将Fe3O4与SrFe12O19复合制成复合吸波材料Fe3O4-SrFe12O19,利用X射线衍射仪(XRD)、透射电镜(TEM)、振动样品磁强计(VSM)和矢量网络分析仪(PNA)对产物的物相、显微结构、磁性能和吸波性能进行了表征与分析。结果表明,当Fe3O4与SrFe12O19质量比为1∶0.3时,Fe3O4-SrFe12O19饱和磁化强度为11.1emu·g-1,矫顽力0.86Oe,剩余磁化强度0.08emu·g-1,其吸波性能最佳,最大吸收峰值为-17.7dB,-5dB频宽为1.3GHz,较Fe3O4和SrFe12O19的最大吸收峰值分别提高247%和185%,频带分别拓宽1.12GHz和0.40GHz。

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