Influence of Sputtered Gold Electrode on Pulsed Vacuum Surface Flashover Characteristics of Alumina Ceramic

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Influence of Sputtered Gold Electrode on Pulsed Vacuum Surface Flashover Characteristics of Alumina Ceramic

更新时间：2025-07-09

- Influence of Sputtered Gold Electrode on Pulsed Vacuum Surface Flashover Characteristics of Alumina Ceramic
- Vol. 45, Issue 8, Pages: 97-101(2011)
- 作者机构：
  
  西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM855
- Online First：10 August 2011，
  
  Published：2011
- 稿件说明：
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Influence of Sputtered Gold Electrode on Pulsed Vacuum Surface Flashover Characteristics of Alumina Ceramic[J]. 2011, 45(8): 97-101.
DOI：

Influence of Sputtered Gold Electrode on Pulsed Vacuum Surface Flashover Characteristics of Alumina Ceramic[J]. 2011, 45(8): 97-101. DOI：

摘要

研究了溅射金膜对氧化铝陶瓷在真空环境中、纳秒脉冲高电压作用下沿面闪络特性的影响规律.通过对氧化铝陶瓷表面粗糙度、电极接触形式的研究

并结合表面态陷阱、界面能带结构、电荷注入过程的分析

探究了影响氧化铝陶瓷溅射金膜后沿面闪络电压的主要原因.在50 ns/1.2 μs脉冲下、电极间距10 mm时

测量各试样的闪络电压60次

取后30次平均值作为稳定的闪络电压.研究结果发现

氧化铝陶瓷在溅射金膜电极试样的闪络电压比直接压接电极试样的闪络电压低

这是因为在不同电极接触方式下

氧化铝陶瓷材料的表面态对真空中的电子发射和材料表层的电荷注入的影响不同所致.

Abstract

The effect of sputtered gold electrode on surface flashover characteristics of Al

(alumina)ceramic

under nanosecond pulsed high voltage in vacuum environment

is investigated. And the mechanism is clarified by the discussion for effects of surface roughness

surface traps

surface energy band structure and charge injection. Six kinds of 95% Al

ceramics with different surface roughness and electrode contacting types are prepared. The flashover voltage is measured under 50 ns(rise time)/1.2 μs(half-height width time)unipolar pulse and 5×10

-3

Pa vacuum degree. It is found that the flashover voltage for the samples with sputtered gold contact electrode gets lower than ones without gold contact electrode

because the surface state induced by sputtered gold-electrode can affect the electron emission and charge injection on the

sample surface.

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references

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