Material transformation of alumina and influence on leakage current by application of DC high voltage at high temperatures

Satoshi Kawato, Nobuko Hanada, Masashi Mitsui, Masayoshi Ishida*

*この研究の対応する著者

研究成果: Article査読

抄録

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.

本文言語English
ページ(範囲)685-692
ページ数8
ジャーナルIEEJ Transactions on Fundamentals and Materials
137
12
DOI
出版ステータスPublished - 2017
外部発表はい

ASJC Scopus subject areas

  • 電子工学および電気工学

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