Flashover-characteristics in the Micrometer-scale Gap on ZnO

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  • Tani Naoki
    Graduate School of Engineering, University of Hyogo
  • Okada Sho
    Graduate School of Engineering, University of Hyogo
  • Ueno Hideki
    Graduate School of Engineering, University of Hyogo

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  • ZnO上マイクロギャップにおけるフラッシオーバ特性
  • ZnO ジョウ マイクロギャップ ニ オケル フラッシオーバ トクセイ

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Abstract

<p>Characteristics of flashover voltage were investigated for some electrode configurations (gap on borosilicate glass, gap on ZnO, air gap). And negative steep pulse voltage was applied to the gap on solid dielectric plate with the gap lengths of 5 ～ 40 µm. As a result, it found that the flashover voltage in each electrode configuration depends on the gap length. At the gap lengths of 5 ～ 20 µm, no significant difference among the investigated electrode configurations at flashover voltage was observed. Moreover, at 5 ～ 10 µm, it was close to the Paschen curve. At the gap lengths of 20 ～ 40 µm, the flashover voltage varies depending on the electrode configuration, and the descending order are the air gap, the glass gap, and the ZnO gap. It is suggested the property that ZnO's work function is low make the flashover voltage reduction.</p>

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