纳米Fe3O4及Fe3O4-SrFe12O19吸波复合材料的制备及性能

景红霞; 李巧玲; 叶云; 杨晓峰

纳米Fe₃O₄及Fe₃O₄-SrFe₁₂O₁₉吸波复合材料的制备及性能

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

基金项目: 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)

详细信息

通讯作者:
李巧玲, 博士后, 教授, 主要研究方向: 新型材料的制备及研究 E-mail: qiaolingl@163.com

中图分类号: TB34
计量
- 文章访问数: 968
- PDF下载量: 636
- 被引次数: 0
出版历程
- 收稿日期: 2011-12-20
- 修回日期: 2012-02-02
- 刊出日期: 2013-02-15

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

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

摘要

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11.1 emu·g^-1, 矫顽力0.86 Oe, 剩余磁化强度0.08 emu·g^-1, 其吸波性能最佳, 最大吸收峰值为-17.7 dB,-5 dB频宽为1.3 GHz, 较Fe₃O₄和 SrFe₁₂O₁₉的最大吸收峰值分别提高247%和185%, 频带分别拓宽1.12 GHz和0.40 GHz。
- 共沉淀法 /
- 超顺磁性 /
- Fe₃O₄-SrFe₁₂O₁₉ /
- 磁性能 /
- 吸波性能
Abstract: 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.
- coprecipitation method /
- superparamagnetic /
- Fe₃O₄-SrFe₁₂O₁₉ /
- magnetic property /
- wave-absorbing property