表面粗糙度对聚合物材料真空沿面闪络特性的影响

doi:10.19595/j.cnki.1000-6753.tces.181730

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Abstract As an important factor of the surface state, the surface roughness is closely related to vacuum flashover. In order to investigate the influence of surface roughness on flashover characteristic of polymer materials and its influence mechanism, the polytetrafluoroethylene (PTFE), polymethylmethacrylate (PMMA) and polyamide 6 (PA6) samples with different surface roughness prepared with different meshes of sandpapers were used. The key surface parameters of the samples were measured, such as the morphology, surface potential, surface trap parameters, and the secondary electron emission yield (SEY). The flashover experiments of different roughness samples were carried out in vacuum. The analysis of the sample surface parameters before and after grinding shows that the influence of surface roughness on the surface potential and trap parameters is related to the roughness range and material type. Besides, the surface roughness has a certain influence on the SEY. Increasing the roughness of materials within a certain range can improve the flashover voltage in vacuum, which is directly related to the surface charge dissipation, trap level and SEY characteristics of insulating materials. The experimental results can provide a reference for analyzing the influence of surface factors on the surface insulation characteristics and material modification.

Key words： Vacuum flashover surface roughness trap second electron polymer

Received: 08 November 2018 Published: 02 September 2019

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TM853

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	Articles by authors
	Hu Duo
	Ren Chengyan
	Kong Fei
	Yan Ping
	Shao Tao

Cite this article:

Hu Duo,Ren Chengyan,Kong Fei等. Influence of the Roughness on Surface Flashover of Polymer Materials in Vacuum[J]. Transactions of China Electrotechnical Society, 2019, 34(16): 3512-3521.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181730 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I16/3512

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