表面激光处理对氧化铝陶瓷真空中闪络特性的影响

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Abstract

The surface phenomena across a solid insulating material under high electric field in vacuum are closely related to the surface conditions of the material. The CO₂ laser generator is employed to modify the surface condition of alumina ceramics. The density of scratched lines is 10～50 per 5mm, and based on adjusting the energy output of laser generator, and the depth of scratched lines is 0.05～0.25mm. The experimental results show that, there are continuous line-like holes on the surface of alumina ceramics due to heat after laser treatment, and their flashover voltages are changed obviously. While proper adjusting the density and depth of scratched lines, the regular surface microscopic pattern can be achieved and the material exhibits a better surface electric strength. According to the scratching technology in this paper, the larger scratching density and the better scratching effect, the higher flashover voltage. When the density is 50 lines per 5mm and the depth is 0.2mm, the surface shows a best microscopic structure and is totally covered by uniform and continuous holes, and the flashover voltage reaches up its maximal value. It is considered that, the uniformity of surface microstructure of a material can be used to describe and regulate its flashover performance.

Key words： Flashover alumina ceramic laser treatment vacuum

Received: 17 December 2007 Published: 11 February 2014

PACS:	TM85
	TM281.1

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	Articles by authors
	Yu Kaikun
	Zhang Guanjun
	Zheng Nan
	Liu Guoqing
	Zhang Yuanbin

Cite this article:

Yu Kaikun,Zhang Guanjun,Zheng Nan等. Effects of Surface Laser Treatment on Flashover Characteristics Across Alumina Ceramics in Vacuum[J]. Transactions of China Electrotechnical Society, 2009, 24(1): 28-34.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2009/V24/I1/28

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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。