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Journal of Nanomaterials
Volume 2015, Article ID 146260, 6 pages
Research Article

Influence of Nanocomposites of LDPE Doped with Nano-MgO by Different Preparing Methods on Its Dielectric Properties

1Key Laboratory of Engineering Dielectric and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, China
2College of Material Science & Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang 150040, China
3College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Heilongjiang 150080, China
4Zhongtian Technology Group Ltd., Nantong, Jiangsu 226000, China

Received 20 August 2014; Revised 2 November 2014; Accepted 18 November 2014

Academic Editor: Jian Sun

Copyright © 2015 Wenlong Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


LDPE doped with nano-MgO can effectively suppress the space charge accumulation in the nanocomposite under DC applied field, and this suppression was affected greatly by the prepared nano-MgO particles. In this paper, the influence of nanocomposite of LDPE doped with nano-MgO by using different preparation methods on their space charge, and volume resistivity as well as DC breakdown strength was researched. The results showed that size of nano-MgO prepared by the traditional heating method was about 22.74 nm, while being only about 12.76 nm by the microwave-assisted method. When the nano-MgO content in the composite was 2 wt% by weight, the space charge accumulation in this composite was obviously reduced; meanwhile both the volume resistivity and DC breakdown strength were enhanced. When nano-MgO was prepared by the microwave-assisted method, the electric properties of its LDPE nanocomposite were obviously better than those of nano-MgO prepared by traditional heating method.