雪試料の誘電的性質における経時変化と温度特性

• 竹井 巖

  北陸大学薬学部

書誌事項

タイトル別名

• Sintering process and temperature dependence of the dielectric behavior of snow samples
• ユキ シリョウ ノ ユウデンテキ セイシツ ニ オケル ケイジ ヘンカ ト オンド トクセイ

抄録

Dielectric properties of snow samples, which were made from stored snow or hoar frost, were studied in the frequency range from 50 Hz to 5 MHz and temperature range from -15°C to -0.3°C. In the sintering process at -1°C, the dielectric dispersion strength and the low-frequency conductivity of snow samples increased with time. The sintering effects can be mainly related to the growth of bonds between ice particles. The dielectric-relaxation time of snow samples at -10°C was less than 1/10 the value for ice. A typical plot of the complex dielectric constant (Cole-Cole plot) showed a locus with a depressed shape on the high-frequency side, which reveals the distribution of relaxation times. The results of the dielectric dispersion suggest an easier reorientation of water molecules near the surface of ice particles. The low-frequency conduction, which reflects the d.c. conduction in snow samples, consists largely of surface conduction on the ice particles, and shows the influence of the quasi-liquid layer on the ice particles above -6°C. The temperature dependence of the low-frequency conductivity(e.g. at 100 Hz)of snow samples shows a peak around -2deg:C.

収録刊行物

• 雪氷

  雪氷 65 (6), 511-522, 2003

  公益社団法人 日本雪氷学会

キーワード

• 雪
• 誘電分散
• 融点近傍
• 擬似液体層
• 粒子間結合

詳細情報

• CRID: 1390001206460909056
• NII論文ID: 10012510686
• NII書誌ID: AN00131221
• DOI: 10.5331/seppyo.65.511
• ISSN: 18836267
• ISSN: 03731006
• NDL書誌ID: 6780064
• Web Site: http://id.ndl.go.jp/bib/6780064
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6780064
• 本文言語コード: ja
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可