Anomalous phenomena in solid dielectrics under high electric fields
Chen, G. (2009) Anomalous phenomena in solid dielectrics under high electric fields. 2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials (ICPADM 2009), 954-60.
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Description/Abstract
Solid dielectrics have been used extensively in electrical and electronic industries. In the power industry, ultra high voltage transmission and cost saving of power equipment often result in that the dielectrics are operating under high electric fields. On the other hand, reduction in size for modern electronic systems also requires that the dielectrics operate reliably under high electric fields. It is therefore imperative to understand the response of dielectric materials to the high electric fields. In addition to high conduction current, power loss and potential breakdown, it has been observed over the years there are several anomalous phenomena occurred under high electric fields. These are surface potential cross-over phenomenon in corona charged dielectrics, discharging current flowing in the same direction as charging current, space charge fast decaying and transient space charge limited current. In the present paper all these phenomena have been experimentally demonstrated but most importantly a bipolar charge injection model has been used to understand the observed phenomena under high dc fields. Preliminary simulations based the model reveal that the presence of bipolar charges is the key to explain these anomalous phenomena.
| Item Type: | Article |
|---|---|
| Additional Information: | Imported from ISI Web of Science |
| Divisions: | Faculty of Physical Sciences and Engineering > Electronics and Computer Science > EEE |
| Item ID: | 270259 |
| Date Deposited: | 21 Apr 2010 07:46 |
| Last Modified: | 01 Mar 2012 11:59 |
| Contributors: | Chen, G. (Author) |
| Date: | 2009 |
| Additional Information: | Imported from ISI Web of Science |
| Status: | Unpublished |
| Further Information: | Google Scholar |
| ISI Citation Count: | 0 |
| URI: | http://eprints.soton.ac.uk/id/eprint/270259 |
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