<論文>全乾スプルース材の誘電特性のCole-Coleプロット

Abstract

シトカスプルース(Pisea sitchensis Carr.)材の全乾状態における繊維方向および接線方向の誘電特性を, 5つの周波数(50Hz, 110Hz, 1kHz, 10kHz, 100kHz)で, -150℃～-10℃の温度範囲にわたり測定した。結果のCole-Coleプロットより, 木材および細胞壁の誘電特性値を10-5～1012Hzにわたって求めた。1級水酸基の配向分極に基づく緩和の具方性は, 認められなかった。木村の全乾状態における電気伝導は, 1級水酸基の配向に伴うプロトンの移動によるものと推定した。

The dielectric properties in the longitudinal and tangential directions for absolutely dried Sitka spruce (Pisea sitchensis Carr.) wood were measured at five frequencies (50Hz, 110Hz, 1kHz, 10kHz, 100kHz) and over a temperature range from -150℃ to -10℃. From the Cole-Cole plots of the results, the dielectric properties of wood and cell wall over a frcquency range from 10-5Hz to 1012Hz were estimated. The anisotropy of the relaxation due to the orientational poralization of methylol groups was not recognized. The electrical conduction in the absolutely dried wood was considered to be closely related to the orientation of methylol groups.