Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Dielectric Breakdown Characteristics of $Al_2O_3$ Filled DGEBA/MDA/SN System

$Al_2O_3$가 충전된 DGEBA/MDA/SN 계의 절연열화 특성

  • 조영신 (서울시립대학교 화학공학과) ;
  • 심미자 (서울시립대학교 생명과학과) ;
  • 김상욱 (서울시립대학교 화학공학과)
  • Published : 1996.11.16
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Abstract

The dielectric breakdown characteristics of DGEBA/MDA/SN system filled with $Al_2O_3$ under AC high electric field were investigated. As the filler content increased, the dielectric breakdown strength increased, but decreased at higher filler content than 5 phr. The probability of defects such as air bubbles, peel between filler and epoxy resin insulator, etc. increase proportionally to filler contents. Fillers blockade the treeing growth and relax the electric field at the tip of electrical tree and the treeing propagation rate decreases so that the strength showed higher strength at lower filler content than 5 phr.

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