稳恒磁场处理对聚乙烯基复合材料正温度系数特性的影响

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Abstract A static magnetic field is applied during hot press molding of high-density polyethylene (HDPE)/carbon black(CB)/ferrous powder composites and HDPE/CB/carbon nanotube(CNT) composites. The effect of magnetic field treatment on the temperature-sensing behavior of polyethylene matrix positive temperature coefficient(PTC) composites is investigated. Experimental results indicate that the magnetic field treatment can lead to an alignment of ferrous powders and CNT in HDPE along the direction of applied external magnetic field and further enhance electrical conductivity of the composites in the direction parallel to the magnetic field. This guarantees the composites to have low room-temperature resistivity and high PTC intensity as the concentration of CB is cut down, and also can significantly improve mechanical property and processability of the composites. When the mass concentrations of ferrous powders and CNT are equal, HDPE/CB/ferrous powder composites present better PTC behavior than HDPE/CB/CNT composites after magnetic field treatment.

Key words： Magnetic field High-density polyethylene PTC composites ferrous powders carbon nanotube

Received: 07 June 2011 Published: 28 November 2013

PACS:

TM243

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	Han Baozhong
	Li Changming
	Ma Fenglian

Cite this article:

Han Baozhong,Li Changming,Ma Fenglian. Effect of Static Magnetic Field Treatment on Positive Temperature Coefficient Behavior of Polyethylene Matrix Composites[J]. Transactions of China Electrotechnical Society, 2013, 28(2): 55-59.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I2/55

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