Preparation and properties of nano-Fe3O4 and Fe3O4-SrFe12O19 wave-absorbing composites

被引：0
|
作者：
Jing, Hongxia [1 ]
Li, Qiaoling [1 ]
Ye, Yun [2 ]
Yang, Xiaofeng [1 ]
机构：
[1] Department of Chemistry, College of Science, North University of China, Taiyuan 030051, China
[2] College of Material Science and Engineering, North University of China, Taiyuan 030051, China
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2013年 / 30卷 / 01期
关键词：
Superparamagnetism - Coprecipitation - Strontium compounds - Crystal microstructure - Magnetic properties - Saturation magnetization;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The superparamagnetic nano-Fe3O4 was prepared by coprecipitation method. Then wave-absorbing composite material Fe3O4-SrFe12O19 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 Fe3O4-SrFe12O19 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 SrFe12O19, the maximum absorption respectively increases by 247% and 185%, the frequency band widens 1.12 GHz and 0.40 GHz respectively.
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页码：130 / 134
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