階段状直流昇圧過程における低密度ポリエチレン中の空間電荷蓄積および伝導電流の変化

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2016/11/01

タイトル(英語): Conduction Current and Space Charge Accumulation in Low Density Polyethylene under Stepwisely Increasing DC Voltage

著者名: 越智　亮平（愛媛大学大学院理工学研究科），尾崎　良太郎（愛媛大学大学院理工学研究科），門脇　一則（愛媛大学大学院理工学研究科）

著者名(英語): Ryohei Ochi (Graduate School of Science and Engineering, Ehime University), Ryotaro Ozaki (Graduate School of Science and Engineering, Ehime University), Kazunori Kadowaki (Graduate School of Science and Engineering, Ehime University)

キーワード: 空間電荷，低密度ポリエチレン，電気伝導，空間電荷制限電流，パルス静電応力法　　space charge，low density polyethylene，electrical conduction，space charge limited current，pulsed electroacoustic method

要約(英語): This paper presents an experimental study on temporal change of conduction current and space charge accumulation in a low density polyethylene (LDPE) under stepwisely increasing DC voltage. Steady currents under various applied fields from 0.1 to 1.9 MV/cm are simultaneously measured with the observation of space charge distributions in a 150-μm-thick LDPE between semiconductive (SC) rubber (anode) and evaporated-Al (cathode) system or evaporated-Al (anode) and evaporated-Al (cathode) system. It is known the relationship between the conduction current and applied voltage for solid dielectrics is classified in two models, ohmic-model (electrode limited model) and space-charge-limited current (SCLC) model (bulk-limited model). In general, the conduction model for solid dielectrics shifts from ohmic-model to SCLC-model with the increase in voltage. We confirm that the current characteristic of LDPE with Al(+)/Al(-) shifts from ohmic to SCLC at the critical applied field of 0.6 MV/cm. The current characteristics of LDPE with SC(+)/Al(-) under low applied fields below 0.4 MV/cm well agree with SCLC model because positive space charges injected from the SC anode are distributed in the bulk of LDPE. On the other hand, the current characteristics under higher applied fields indicate that the conduction mechanism is based on ohmic-model though a large number of positive space charges are accumulated in LDPE. The reason will be discussed on the bases of the simultaneous measurements of the external currents and the space charge distributions.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.136 No.11 （2016） 特集：有機誘電性・機能性材料の作製・物性評価技術の新展開と次世代エレクトロニクスへの応用

本誌掲載ページ: 717-723 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/136/11/136_717/_article/-char/ja/