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过程工程学报 ›› 2016, Vol. 16 ›› Issue (5): 889-894.DOI: 10.12034/j.issn.1009-606X.216162

• 材料工程专栏 • 上一篇    下一篇

夹层中空结构铁酸镍粉末的制备及其吸波性能

姚永林1,张传福2,樊友奇3,湛菁2   

  1. 1. 马鞍山马向路号安徽工业大学秀山校区冶金学院
    2. 中南大学冶金与环境学院
    3. 安徽工业大学冶金工程学院
  • 收稿日期:2016-03-23 修回日期:2016-05-04 出版日期:2016-10-20 发布日期:2016-10-14
  • 通讯作者: 姚永林 yaoyongl@ahut.edu.cn

Preparation and Microwave Absorbing Property of Double Skin NiFe2O4 Powders

YAO Yong-lin 1,3,ZHANG Chuan-fu 2,FAN You-qi 1,3,ZHAN Jing 2   

  1. 1. School of Metallurgical Engineering, Anhui University of Technology
    2. School of Metallurgy and Environment, Central South University
    3. School of Metallurgical Engineering, Anhui University of Technology
  • Received:2016-03-23 Revised:2016-05-04 Online:2016-10-20 Published:2016-10-14
  • Contact: YAO Yong-lin yaoyongl@ahut.edu.cn

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摘要： NiFe2O4 powders with double skin structure which shows a length of 5 ?m and curved surface thickness of 0.5 ?m were prepared by thermal decomposition of their oxalate precursors. The NiFe2O4 powders were mixed uniformly with a proportion of paraffin and then pressed to composite samples. The 采用草酸盐沉淀法制备草酸铁镍前驱体，热分解得到长5 ?m、曲面厚0.5 ?m的夹层中空结构NiFe2O4粉末，将其与石蜡按一定比例混合均匀压制得NiFe2O4/石蜡复合物，考察了其电磁参数，计算了其吸波性能. 结果表明，NiFe2O4含量为40%(?)时复合物吸波性能最佳，样品厚度为3.5 mm时，材料在6.66 GHz处反射损失最小，为?52.06 dB，厚度为3.0 mm时，材料在6.98?8.59及9.72?10.84 GHz范围内反射损耗小于?10 dB，有效吸收频宽为2.73 GHz.

关键词: 铁酸镍, 草酸盐, 电磁参数, 吸波性能

Abstract: NiFe2O4 powders with double skin structure which shows a length of 5 ?m and curved surface thickness of 0.5 ?m were prepared by thermal decomposition of their oxalate precursors. The NiFe2O4 powders were mixed uniformly with a proportion of paraffin and then pressed to composite samples. The electromagnetic parameters of NiFe2O4/paraffin composites with different NiFe2O4 contents were measured by a network analyzer, and the reflection losses were calculated by transmission line theory. The results showed that the 40%(?) NiFe2O4/paraffin composite has the best absorbing property. The minimum reflection loss reaches ?52.06 dB with a sample thickness of 3.5 mm at 6.66 GHz. The effective frequency band of reflection loss less than ?10 dB is 2.73 GHz (6.98?8.59 and 9.72?10.84 GHz) for the sample with a thickness of 3.0 mm.

Key words: NiFe2O4, oxalate, electromagnetic parameter, microwave absorbing property

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