Flashover Characteristic of Epoxy Composites Filled With Different Micro-Inorganic Oxide Particles Under Nanosecond Pulse in Vacuum

Author

Chen, Yu ; Cheng, Yonghong ; Wu, Kai ; Nelson, J. Keith ; Dissado, Leonard A. ; Li, Shengtao

Author_Institution

State Key Lab. of Electr. Insulation & Power Equip., Xi´´an Jiaotong Univ., Xian

Volume

37

Issue

1

fYear

2009

Firstpage

195

Lastpage

203

Abstract

Research on the vacuum surface flashover mechanisms of insulating material under nanosecond pulses is important for the design and manufacture of high-power pulse generators. Here, the vacuum surface flashover characteristic of epoxy composites filled with different microfillers Al₂O₃ middot3H₂O , Al₂O₃, BaTiO₃, and TiO₂ is investigated using a unipolar pulse generator (50-ns rise time and 600-ns full-width at half-maximum). In addition, their thermally stimulated depolarization current and secondary electron emission (SEE) coefficients are measured. The results show that the flashover performance does not depend just on the SEE coefficient, but that the different effects of shallow and deep traps must also to be taken into account.

Keywords

alumina; barium compounds; filled polymers; flashover; insulating materials; pulsed power supplies; secondary electron emission; surface charging; surface discharges; thermally stimulated currents; titanium compounds; Al₂O₃; Al₂O₃H₂O; BaTiO₃; TiO₂; deep traps; epoxy composites; flashover characteristic; high-power pulse generator design; high-power pulse generator manufacture; insulating material; microfillers; microinorganic oxide particles; nanosecond pulse; secondary electron emission coefficients; shallow traps; thermally stimulated depolarization current; unipolar pulse generator; vacuum surface flashover mechanisms; Aluminum oxide; Coatings; Conducting materials; Dielectrics and electrical insulation; Electron emission; Flashover; Powders; Power engineering and energy; Pulse generation; Voltage; Epoxy composites; microscale inorganic oxide particles; pulsed vacuum flashover; secondary electron emission (SEE); thermally stimulated current;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2008.2005674

Filename

4735632