纳米Fe_3O_4及Fe_3O_4-SrFe_(12)O_(19)吸波复合材料的制备及性能  

Preparation and properties of nano-Fe_3O_4 and Fe_3O_4-SrFe_(12)O_(19) wave-absorbing composites

作　　者：景红霞[1] 李巧玲[1] 叶云[2] 杨晓峰[1] 

机构地区：[1]中北大学理学院化学系,太原030051 [2]中北大学材料科学与工程学院,太原030051

出　　处：《复合材料学报》2013年第1期130-134,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(20871108,51272239);山西省青年科学基金(2010021022-3);山西省高等学校科技项目(2010115)

摘　　要：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。The superparamagnetic nano-Fe304 was prepared by coprecipitation method. Then wave-absorbing composite material FeaO4 -SrFe12 O19 was prepared. The crystal phase, microstructure, magnetic property and wave-absorbing property of the sample were characterized by XRD, TEM, VSM and PNA. The results show that, when the mass ratio of Fe3O4 to SrFe12O19 is 1： 0. 3, the saturation magnetization, coercive field and residual magnetization of Fe304 -SrFenO19 are 11.1 emu g-1, 0.86 Oe and 0.08 emu g-1 respectively. It has the best wave-absorbing property, which of the maximum absorption can reach -17.7 dB and the -5 dB bandwidth is 1.3 GHz. Compared with Fe3O4 and SrFen 029, the maximum absorption respectively increases by 2470/00 and 185 %, the frequency band widens 1.12 GHz and 0.40 GHz respectively.

关 键 词：共沉淀法 超顺磁性 Fe3O4-SrFe2O19磁性能 吸波性能 

分 类 号：TB34[一般工业技术—材料科学与工程]