Complex Permittivity of Graphite, Carbon Black and Coal Powders in the Ranges of X-band Frequencies (8.2 to 12.4 GHz) and between 1 and 10 GHz

DOI Web Site 被引用文献8件 参考文献48件 オープンアクセス
  • Hotta Masahiro
    Department of Chemistry and Materials Science, Tokyo Institute of Technology
  • Hayashi Miyuki
    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology
  • Lanagan Michael Thomas
    Center for Dielectric Studies, Materials Research Institute, The Pennsylvania State University
  • Agrawal Dinesh Kumar
    Microwave Processing and Engineering Center, Materials Research Institute, The Pennsylvania State University
  • Nagata Kazuhiro
    Department of Conservation Science, Tokyo University of the Arts

書誌事項

公開日
2011
DOI
  • 10.2355/isijinternational.51.1766
公開者
一般社団法人 日本鉄鋼協会

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説明

The real and imaginary parts of the relative complex permittivity (εr' and εr") were measured in the ranges of X-band frequencies (8.2 to 12.4 GHz) and between 1 and 10 GHz for graphite, carbon black and coal powders at room temperature so as to clarify the relation between the complex permittivities of carbonaceous materials and their characteristics, i.e., graphitization, porosity (i.e., specific surface area) and ash contained in coals. It is found that the complex permittivities increase with increasing crystallite size and specific surface area. It is also found that the dependency of the permittivities on the ash content seems be negligible within the range of the ash content in the present study.

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