聚萘二甲酸丁二醇酯试样表面电荷迁移与消散机理

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Abstract Electrostatic charges can be accumulated on solid dielectric surface and are for a long time are observed. It has been found that the field is seriously enhanced and surface discharge is induced. Therefore, it’s very important to investigate the behavior of surface charge. Previous works have shown that the charges are deposited on the region where normal component of electric field exists. However, knowledge of the behaviour of surface charge under the electric field with strong tangential but weak normal component is very limited. In this paper, polybutylene naphthalate (PBN) is employed as test sample. By applying a negative bias voltage between two aluminum electrodes on the surface, a field of strong tangential component is obtained. An electrostatic probe is designed to measure the charge density not only in the accumulating but also the decay processes. Obtained results show that a large amount of negative charges are deposited on the surface. The max charge density appears adjacent to the negative electrode and decreases towards the grounding electrode. Charge decay is observed including two processes, in which a fast decay initially occurs followed by a slow process. Furthermore, it is suggested that the presence of localized surface states should be account for the surface charging, the charge decay is ascribed to the recombination between de-trapped charges and positive ions which are in the air.

Key words： Polybutylene naphthalate surface charge accumulation migration decay surface states

Received: 10 September 2007 Published: 12 February 2014

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TM852

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	Du Boxue
	Gao Yu
	Liu Yanjun

Cite this article:

Du Boxue,Gao Yu,Liu Yanjun. Charge Migration and Decay on Polybutylene Naphthalate Surface[J]. Transactions of China Electrotechnical Society, 2009, 24(3): 36-40.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2009/V24/I3/36

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