高温水素雰囲気での各種無機材料に関する直流絶縁特性

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: 2014/07/01

タイトル(英語): DC Voltage Insulating Properties of Various Inorganic Materials in Hydrogen Atmosphere at High Temperatures

著者名: 高橋　晃一（筑波大学大学院システム情報工学研究科），花田　信子（筑波大学大学院システム情報工学研究科），石田　政義（筑波大学大学院システム情報工学研究科）

著者名(英語): Koichi Takahashi (Graduate School of Systems and Information Engineering, University of Tsukuba), Nobuko Hanada (Graduate School of Systems and Information Engineering, University of Tsukuba), Masayoshi Ishida (Graduate School of Systems and Information Engineering, University of Tsukuba)

キーワード: 直流絶縁特性，無機材料，水素，高温，部分放電，固体酸化物形燃料電池　　DC voltage insulating property，inorganic material，hydrogen，high temperature，partial discharge，solid oxide fuel cell

要約(英語): In this study, the insulating properties on DC voltage in hydrogen atmosphere at high temperatures (600-850℃) were evaluated for alumina (Al2O3), magnesia (MgO), silicon nitride (Si3N4) and mica (KMg3(Si3Al)O10(OH)2) to comprehend the difference in insulating properties of oxide, nitride and mineral. The activation energies of electrical conductivity of alumina and magnesia in hydrogen were larger than those in air. On the other hand, at silicon nitride and mica electrical conduction in hydrogen were same as those in air. Therefore low oxygen partial pressure would have some influence on electrical conduction of oxide. And increasing temperature didn't bring a huge change of electrical conduction mechanism in all materials and both of the atmospheres. The maximum amounts of partial discharge in hydrogen tended to increase compared to those in air at high voltage. Applied voltage, in which the maximum amounts of partial discharge started to increase rapidly, became lower with increasing temperature in all materials and both of the atmospheres. The total amounts of partial discharge tended to decrease with increasing temperature in all materials and both of the atmospheres. However, at exceeding certain temperatures, the total amounts of partial discharge increased or slightly decreased.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.134 No.7 （2014）

本誌掲載ページ: 466-471 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/134/7/134_466/_article/-char/ja/