アルミナの高温領域での直流高電圧印加による材料変性と漏れ電流への影響

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: 2017/12/01

タイトル(英語): Material Transformation of Alumina and Influence on Leakage Current by Application of DC High Voltage at High Temperatures

著者名: 川人　敏志（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），三井　雅史（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): Satoshi Kawato (Graduate School of Systems and Information Engineering, University of Tsukuba), Nobuko Hanada (Graduate School of Systems and Information Engineering, University of Tsukuba), Masashi Mitsui (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: アルミナ，漏れ電流，高温，材料変性　　alumina，leakage current，high temperature，material transformation

要約(英語): In order to investigate a material transformation of alumina (Al2O3) and an influence on leakage current by application of high DC voltage at high temperatures, the leakage current of two alumina samples were measured for 100 hours and the elemental analyses were carried out. The leakage current tended to decrease, and the electrical conductivity decreased with increasing applied voltage. The activation energies of electrical conduction of two samples were nearly equal. Thus, the reproducibility of these results was confirmed. After the experiments, deposits of impurities contained in alumina were observed in the surrounding area of the positive electrode. Furthermore, Na, which was contained in Pt paste used for preparing the electrodes, can be a charge career of alumina because it was detected from only negative electrodes. Therefore, the reason why the leakage current decreased is the decrease in the amount of charge careers because of the deposits of impurities.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.12 （2017）

本誌掲載ページ: 685-692 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/137/12/137_685/_article/-char/ja/