Complex permittivity spectra of several insulating polymers at electrical and THz frequencies

Y. Ohki, N. Fuse, S. Hikosaka, Y. Takemura, M. Mizuno, K. Fukunaga

研究成果: Conference contribution

6 引用 (Scopus)

抜粋

Frequency and temperature dependencies of the real part (εr′) and imaginary part (εr″) of relative complex permittivity were measured at electrical frequencies from 10 -2 to 105 Hz at temperatures from -80 to 200°C for various kinds of organic insulating polymer films. Furthermore, frequency spectra were obtained at 30°C in a frequency range from 0.4 to 4.0 THz for both parts. As a result, it was found that there are significant differences in both the temperature and frequency dependencies of εr′ and εr″;, depending mainly on the polymer being polar or nonpolar. By comparing terahertz (THz) time-domain spectra obtained for various polymeric insulating films such as polyamide and poly(L-lactide), it was found that the polar polymers have one or two distinct dielectric loss peaks around 2.0 and 3.0 THz. More specifically, among the polymers examined, only polyamide has both two peaks, while poly(L-lactide) and polyethylene terephthalate have only one peak. Nonpolar polymers show no peaks. Furthermore, it has become clear that εr′ approaches almost the same value of 2.3 at 3.8 THz in most polymers including polar ones. This agrees with the fact that only electronic polarization and atomic polarization associated with very light atoms such as hydrogen can participate in polarization at such high frequencies.

元の言語English
ホスト出版物のタイトルCEIDP - 2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena
ページ7-10
ページ数4
DOI
出版物ステータスPublished - 2009 12 1
イベント2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Virginia Beach, VA, United States
継続期間: 2009 10 182009 10 21

出版物シリーズ

名前Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
ISSN(印刷物)0084-9162

Conference

Conference2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
United States
Virginia Beach, VA
期間09/10/1809/10/21

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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  • これを引用

    Ohki, Y., Fuse, N., Hikosaka, S., Takemura, Y., Mizuno, M., & Fukunaga, K. (2009). Complex permittivity spectra of several insulating polymers at electrical and THz frequencies. : CEIDP - 2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (pp. 7-10). [5377894] (Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP). https://doi.org/10.1109/CEIDP.2009.5377894