DocumentCode :
2527044
Title :
The mechanism of electrical conduction in polyethylene/carbon black composite
Author :
Xi, B. ; Chen, G.
Author_Institution :
State Key Lab. of Electr. Insulation for Power Equipment, Xi´´an Jiaotong Univ., China
Volume :
2
fYear :
2000
fDate :
2000
Firstpage :
1015
Abstract :
The mechanism of electrical conduction in the polyethylene (PE)/carbon black (CB) composite is investigated. It is found experimentally that there are three distinct regions in the J-E curve of the PE/CB composite. On the basis of the energy bands of the conductance grain-insulation dielectric-conductance grain system, the electrical conduction equation can be derived correspondingly according to the change in barrier potential under different electric fields. It shows that J∝E at low field strength, Log J/E∝E at middle-field strength and Log J/E∝-1/E at high field strength. The equations fit well with the results obtained from experiments. The evidence suggests that the conduction mechanism in the PE/CB composite can be attributed to electrons tunnelling through the intergranular gaps among the CB particles
Keywords :
band structure; electrical conductivity; filled polymers; particle reinforced composites; polyethylene insulation; tunnelling; J-E curve; barrier potential; conductance grain-insulation dielectric-conductance grain system; electric fields; electrical conduction equation; electrical conduction mechanism; electron tunnelling; energy bands; intergranular gaps; low field strength; middle-field strength; polyethylene/carbon black composite; Composite materials; Dielectrics and electrical insulation; Differential equations; Electric potential; Electrons; Laboratories; Polyethylene; Polymers; Temperature; Tunneling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Properties and Applications of Dielectric Materials, 2000. Proceedings of the 6th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
0-7803-5459-1
Type :
conf
DOI :
10.1109/ICPADM.2000.876404
Filename :
876404
Link To Document :
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