Title :
Dielectric breakdown characteristics of DGEBA/MDA/SN-Al2O3 composite system
Author :
Cho, Young Shin ; Park, Jang Ho ; Shim, Mi Ja ; Kim, Sang Wook
Author_Institution :
Dept. of Chem. Eng., Seoul Univ., South Korea
Abstract :
The dielectric breakdown characteristics of Al2O3 filled DGEBA (diglycidyl ether of bisphenol A)/MDA (4,4´-methylene dianilene/SN (succinonitrile) system were investigated. To simulate the stress concentration the sharp-pointed needle and plane electrode geometry was used. It was shown that as the filler contents increased the dielectric breakdown strength increased and then decreased at higher filler content than 5 phr because of the increment of weak point, especially at the interface of filler and epoxy resin initiated from the weakest point of the needle electrode tip. To increase the resistance to the higher electrical stress the curing condition should be modified and a new coupling agent should be introduced
Keywords :
alumina; epoxy insulation; filled polymers; trees (electrical); 4,4´-methylene dianilene; Al2O3; DGEBA/MDA/SN-Al2O3 composite; bisphenol A; breakdown strength; curing; dielectric breakdown; diglycidyl ether; filler content; plane electrode geometry; sharp-pointed needle; stress concentration; succinonitrile; Curing; Dielectric breakdown; Electric resistance; Electrodes; Epoxy resins; Geometry; Needles; Solid modeling; Stress; Tin;
Conference_Titel :
Electrical Insulating Materials, 1998. Proceedings of 1998 International Symposium on
Conference_Location :
Toyohashi
Print_ISBN :
4-88686-050-8
DOI :
10.1109/ISEIM.1998.741718
