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无机材料学报

无机材料学报 ›› 2012, Vol. 27 ›› Issue (8): 817-821.DOI: 10.3724/SP.J.1077.2012.11562 CSTR: 32189.14.SP.J.1077.2012.11562

• 研究论文 • 上一篇    下一篇

碳/氧化铝/二氧化硅涂层的介电和吸波性能研究

刘保荣1, 黄智斌2, 罗 发2, 钱七虎1   

  1. (1. 解放军理工大学 工程兵工程学院, 南京 210007; 2. 西北工业大学 凝固技术国家重点实验室, 西安710072)
  • 收稿日期:2011-09-05 修回日期:2011-10-26 出版日期:2012-08-20 网络出版日期:2012-07-09
  • 作者简介:刘保荣(1958-), 男, 教授级高级工程师. E-mail: 57280137@qq.com
  • 基金资助:

    国家自然科学基金(51072165); 西北工业大学基础研究基金(NPU-FFRJC20110213)

Dielectric and Microwave-absorbing Properties of the Carbon/Alumina/Silica Coating

LIU Bao-Rong1, HUANG Zhi-Bin2, LUO Fa2, QIAN Qi-Hu1   

  1. (1. Engineering Institute of Engineering Crops, PLA University of Science and Technology, Nanjing 210007, China; 2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China)
  • Received:2011-09-05 Revised:2011-10-26 Published:2012-08-20 Online:2012-07-09
  • About author:LIU Bao-Rong. E-mail: 57280137@qq.com
  • Supported by:

    National Natural Science Foundation of China (51072165); NPU Foundation for Fundamental Research (NPU-FFR-JC20110213)

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摘要： 研究了炭黑或碳纤维填充氧化铝/二氧化硅吸波涂层在X波段范围的介电和吸波性能. 结果表明: 吸波涂层的复介电常数随着炭黑或碳纤维含量的增加而增大. 当吸收剂含量相同时, 填充碳纤维的吸波涂层比填充炭黑的吸波涂层具有更大的复介电常数. 当吸收剂含量大于5wt%时, 吸波涂层的介电常数在低频急剧增加, 且随频率增大而减少, 出现频散效应. 反射率测试结果表明: 吸波涂层的最大吸收峰随涂层厚度的增大向低频移动, 当涂层中炭黑含量为2wt%、厚度为1.8 mm时, 吸波涂层在9.2~12.4 GHz范围内反射率小于-10 dB, 具有较好的吸波效果.

关键词: 炭黑, 碳纤维, 介电性能, 吸波性能

Abstract: The permittivity and microwave-absorbing properties of carbon black or carbon fiber filled alumina/ silica coating were investigated in X-band. The results indicate that both the real and imaginary part of the complex permittivity increase with the increasing content of carbon absorber. With the same content of carbon absorber, the coatings filled with carbon fiber shows higher complex permittivity than the coatings filled with carbon black. As the absorber contents increase to 2wt%, the complex permittivity of the coatings decrease with the increase of frequency, which is so-called frequency-dependence dielectric response. The minimum reflection loss of the coatings shifts to low frequency region as their thickness increasing. The results of the microwave absorbing properties show that good microwave absorption ability (below -10 dB) can be obtained in the frequency range from 9.2 GHz to 12.4 GHz for the coating with 2wt% carbon black and 2 mm in thickness.

Key words: carbon black, carbon fiber, dielectric properties, microwave absorbing properties

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