不同掺杂对可加工陶瓷二次电子发射及沿面闪络特性的影响

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摘要固体绝缘材料的表面特性极大地影响着其真空沿面闪络特性, 长期以来这一现象极大地制约着真空绝缘系统的整体性能, 限制了高压电真空设备的发展进程。本文针对一种具有良好加工性能及表面耐电特性的低熔点可加工微晶玻璃陶瓷引入真空绝缘的背景, 在不明显降低可加工性能的前提下, 通过在可加工陶瓷原材料内掺杂不同的低二次电子发射系数金属氧化物Cu₂O以及Cr₂O₃, 研究掺杂之后材料的二次电子发射系数的变化, 对不同掺杂工艺下试品的沿面闪络电压进行研究。结果发现：掺杂低二次电子发射系数金属氧化物能够相应降低可加工陶瓷材料的二次电子发射系数, 通过研究不同加工工艺条件下材料的闪络电压, 发现试样的闪络电压随其二次电子发射系数的降低而提高。

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	于开坤
	张冠军
	田杰
	郑楠
	黄学增
	马新沛
	李光新
	山纳康
	小林信一

关键词 ：沿面闪络, 可加工陶瓷, 二次电子发射系数, 真空

Abstract：Secondary electron emission (SEE) yield is one important factor for the flashover phenomena of solid materials under high electric field in vacuum. On the basis of the novel low melting temperature machinable glass ceramics for vacuum insulation system, which has excellent machinable performance and good electrical properties, different low SEE yield metal oxides including Cu₂O and Cr₂O₃ are doped into the original glass ceramics while keeping its machinable performance, to investigate the effects of different process technology on the surface flashover phenomena of the machinable ceramics under pulse voltage in vacuum. The experimental results indicate that after the metal oxide doped into the original material the SEE yield of the sample reduced. By investigating the different samples' flashover voltage it can be seen that with the sample's SEE yield reducing the sample's vacuum flashover voltage increasing.

Key words： Flashover machinable ceramic SEE yield vacuum

收稿日期: 2009-08-11 出版日期: 2014-03-07

PACS:	TM28
	TM85

基金资助:本文中试品的二次电子发射系数在日本高能加速器研究机构(KEK)进行测量, 得到了Yoshio Saito教授和Shinichiro Michizono博士的帮助, 作者对此表示感谢; 国家自然科学基金重点项目(50911140103), 国家自然科学基金(50777051)和国家高技术发展计划(863)资助项目

作者简介: 于开坤男, 1981年生, 博士研究生, 主要从事电气放电机制与其应用方面的研究。张冠军男, 1970年生, 博士, 教授, 博士生导师, 主要从事高电压绝缘介电现象、放电物理与等离子体技术、变电设备状态检测与故障诊断等方面的研究。

引用本文:

于开坤, 张冠军, 田杰, 郑楠, 黄学增, 马新沛, 李光新, 山纳康, 小林信一. 不同掺杂对可加工陶瓷二次电子发射及沿面闪络特性的影响[J]. 电工技术学报, 2011, 26(1): 23-28. Yu Kaikun, Zhang Guanjun, Tian Jie, Zheng Nan, Huang Xuezeng, Ma Xinpei, Li Guangxin, Yasushi Yamano, Shinichi Kobayashi. Effect of Different Dopant in Machinable Ceramic on Its Secondary Electron Emission and Surface Flashover Characteristics in Vacuum. Transactions of China Electrotechnical Society, 2011, 26(1): 23-28.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2011/V26/I1/23

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