Electromagnetic properties and microwave absorption enhancement of Ba0.85RE0.15Co2Fe16O27-polyanili

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• 作者：Fengying Guo ; Ruiqing Li ; Jijing Xu ; Lianchun Zou…
• 关键词：Polymerization ; Composites ; Dielectric loss ; Electromagnetic properties ; Microwave absorption
• 刊名：Colloid & Polymer Science
• 出版年：2014
• 出版时间：September 2014
• 年：2014
• 卷：292
• 期：9
• 页码：2173-2183
• 全文大小：1,435 KB
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• 作者单位：Fengying Guo (1)
  Ruiqing Li (1)
  Jijing Xu (2)
  Lianchun Zou (3)
  Shucai Gan (1)
  
  1. College of Chemistry, Jilin University, Changchun, 130026, China
  2. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun, 130022, China
  3. Teaching Center of Basic Courses, Jilin University, Changchun, 130062, China
  
• ISSN：1435-1536

文摘

The Gd-, Tb-, and Ho-doped W-type hexagonal ferrite Ba0.85RE0.15Co2Fe16O27 was fabricated by a facile route of low-temperature sol–gel self-propagating combustion. Furthermore, a combination of dielectric loss phase polyaniline and magnetic loss phase Ba0.85RE0.15Co2Fe16O27 as the microwave absorber in a core-shell architecture has been synthesized. The effect of different lanthanide ions Gd, Tb, and Ho on their microstructure, static magnetic properties, electromagnetic properties, and microwave reflection loss have been systematically studied. Our results show that the Ho-doped ferrite has the low microstructure parameters (a, c, and V) and high saturation magnetization (Ms) attributed to its ionic radius and magnetic moment. Moreover, it was found that the Ho-doped composite exhibited excellent microwave absorbing property with a minimum reflection loss (RL) of about ?5.1?dB at 9.4?GHz. The reflection loss of composite increases up to almost triple upon the combination of polyaniline and doped ferrite. Such lightweight and highly effective absorbers via combining the organic and inorganic phase into a core-shell architecture are highly desirable for microwave absorber in various applications. Figure The synthesis and properties of the PANI/REBF composites