无机材料学报 ›› 2014, Vol. 29 ›› Issue (5): 470-474.DOI: 10.3724/SP.J.1077.2014.13367

• 研究论文 • 上一篇    下一篇

纳米铁钴合金/石墨复合材料的微波吸收性能研究

李 佳, 刘洪波, 杨 丽   

  1. (湖南大学 材料科学与工程学院, 长沙 410082)
  • 收稿日期:2013-07-16 修回日期:2013-09-17 出版日期:2014-05-20 网络出版日期:2014-04-24
  • 作者简介:李 佳(1983–), 男, 博士研究生. E-mail: Lijia0330@163.com
  • 基金资助:

    湖南省自然科学基金(10JJ3019)

Research on Microwave Absorption Properties of FeCo/Graphite Nanocomposite

LI Jia, LIU Hong-Bo, YANG Li   

  1. (College of Material Science and Engineering, Hunan University, Changsha 410082, China)
  • Received:2013-07-16 Revised:2013-09-17 Published:2014-05-20 Online:2014-04-24
  • About author:LI Jia. E-mail: Lijia0330@163.com
  • Supported by:

    Natural Science Foundation of Hunan Province (10JJ3019)

摘要: 利用氧化石墨的吸附性能将Fe3+和Co2+吸附到氧化石墨层间制备出Fe3+Co2+/氧化石墨复合物, 再通过氢气还原制备出纳米铁钴合金/石墨复合材料, 采用XRD和SEM以及磁滞回线测试等手段对其晶体结构、微观形貌以及磁学性能进行表征, 探讨了FeCo合金含量对其微波吸收性能的影响。结果表明: 所制备的产物为石墨和纳米FeCo合金颗粒组成的二元复合材料, FeCo合金分散在石墨表面和层间, 粒径为30~150 nm。纳米铁钴合金/石墨复合材料是典型的软磁性材料, 饱和磁化强度随FeCo合金含量的减小而降低。随着FeCo合金含量的减少, 纳米FeCo/石墨复合材料的介电损耗逐渐增加, 磁损耗逐渐减小。FeCo合金含量适当时, 介电损耗和磁损耗的协同作用使复合材料具有较好的微波吸收性能。

关键词: FeCo, 氧化石墨, 纳米复合材料, 微波吸收

Abstract: Fe3+Co2+/graphite oxide composites were firstly prepared by absorbing Fe3+ and Co2+ into the layers of graphite oxide based on absorption property of graphite oxide. And then FeCo/graphite nanocomposites were synthesized by reducing the Fe3+Co2+/graphite oxide compounds with H2. The crystal structure, morphology and magnetic properties were characterized by XRD, SEM and magnetic loop analysis, and the microwave absorption properties, caused by content variation of FeCo alloy, was investigated. Results indicated that the FeCo/graphite nanocomposite was two-phase material composed by graphite and nano FeCo particles. With diameter ranging from 30 nm to 150 nm, the FeCo particles dispersed both on the surface of and between the graphite layers, which made the FeCo/graphite nanocomposite a typical soft magnetic material. With the FeCo alloy content decrease, the saturation magnetization and magnetic loss increased but the dielectric loss decreased. With proper FeCo alloy content, the synergistic effect of dielectric loss and magnetic loss could lead to the FeCo/graphite nanocomposite displaying good microwave absorption property.

Key words: FeCo, graphite oxide, nanocomposite, microwave absorption

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