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| Effect of Magnetic Field on Conductivity Properties of Polyethylene/Carbon Filler Composites |
| Li Changming, Zhang Yang, Wang Ding, Sheng Boyao |
| Key Laboratory of Engineering Dielectric and Its Application, Ministry of Education Harbin University of Science and Technology Harbin 150040 China |
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Abstract The static intense magnetic field is adopted during hot press molding of polyethylene (PE), low-density polyethylene (LDPE)/ carbon black (CB), LDPE/graphite and LDPE/ carbon nano-tubes (CNTs) composites. The effect of magnetic field treatment on the conductive properties of these materials is explored. Experimental results indicate that the magnetic field treatment increases the crystallization of PE and the volume resistivity of PE and LDPE/CB composites. LDPE/Graphite and LDPE/ CNTs composites have good nonlinear conductivity characteristic. Induced magnetic moment in graphite and CNTs caused by magnetic field leads to orientation perpendicular and parallel to the direction of magnetic field in LDPE respectively, which causes a decrease in conductivity of LDPE/graphite composites and an increase in conductivity of LDPE/CNTs composites in the direction parallel to the magnetic field.
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Received: 12 October 2010
Published: 20 March 2014
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2012, Vol. 27 
