シリコーンゴムの電気トリー発生に及ぼす水分子形態の影響

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: 2015/02/01

タイトル(英語): Influence of Molecular Forms of H2O on Electrical Tree Initiation in Silicone Rubber

著者名: 村本　裕二（名城大学理工学部），室賀　さちえ（名城大学理工学部），田邉　顕（名城大学理工学部），清水　教之（名城大学理工学部）

著者名(英語): Yuji Muramoto (Faculty of Science and Technology, Meijo University), Sachie Muroga (Faculty of Science and Technology, Meijo University), Ken Tanabe (Faculty of Science and Technology, Meijo University), Noriyuki Shimizu (Faculty of Science and Technology, Meijo University)

キーワード: シリコーンゴム，電気トリー発生電圧，水分子形態　　silicone rubber，electrical tree initiation voltage，molecular forms of H2O

要約(英語): The investigations into the degradation phenomena and the electric breakdown mechanisms in electrical insulating materials are very important to improve the long term reliability of the power apparatuses. Silicone rubber (SiR) has various excellent characteristics, and is widely used in various apparatus as insulating material. For example, SiR is used in cable joint of power transmission system. However, tree initiation process and degradation phenomena in SiR are not clear. It is commonly accepted that water in SiR influences its electrical insulating characteristic.In this paper, we reported the influence of H2O gas molecules and liquid water impregnation on electrical tree initiation in SiR. The followings are the main observations. 1. Removal of gaseous H2O molecules from SiR by vacuum heating treatment increases tree initiation voltage of SiR. We consider there is a possibility that gaseous H2O molecule forms the hydrogen bond with oxygen of the Si-O bond, and weakens the Si-O bond. This idea was qualitatively supported by a simulation where electric charge distribution and bond distance was calculated by “GAMESS”. 2. Liquid H2O absorption by liquid water impregnating treatment increases tree initiation voltage of SiR. We consider that liquid H2O removes the acceleration space for electron, and also relaxes the high electric field.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.135 No.2 （2015） 特集：電気電子絶縁材料システムシンポジウム

本誌掲載ページ: 124-129 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/135/2/135_124/_article/-char/ja/