针对高压、超高压直流输电电缆中存在空间电荷效应的现象,文中基于MgO/聚乙烯纳米复合材料,加入乙烯-醋酸乙烯共聚物(EVA)进行改性,讨论了EVA的种类及用量对复合材料空间电荷、体积电阻率及直流击穿场强的影响,并通过扫描电镜(SEM)对粒子在复合材料中的分散性进行表征.结果表明,添加VA质量分数为14%的EVA制备的纳米复合材料介电性能要好于添加VA质量分数为50%的EVA,并且此种EVA质量分数为9%时,MgO粒子尺寸为56nm ~76nm,达到了纳米级分散,有效地降低了复合材料中的空间电荷密度,对复合材料的体积电阻率和直流击穿场强均有提高.
参考文献
[1] | N. Hozumi;Y. Muramoto;M. Nagao;Yewen Zhang .Carrier mobility in ethylene-vinylacetate copolymer estimated by transient space charge[J].IEEE transactions on dielectrics and electrical insulation: A publication of the IEEE Dielectrics and Electrical Insulation Society,2001(5):849-853. |
[2] | Hosier, IL;Vaughan, AS;Swingler, SG .An investigation of the potential of ethylene vinyl acetate/polyethylene blends for use in recyclable high voltage cable insulation systems[J].Journal of Materials Science,2010(10):2747-2759. |
[3] | G. C. Montanari;P. H. F. Morshuis .Space charge Phenomenology in Polymeric Insulating Materials[J].IEEE transactions on dielectrics and electrical insulation: A publication of the IEEE Dielectrics and Electrical Insulation Society,2005(4):754-767. |
[4] | Suh K.S.;Kim J.Y. .Interfacial charge in polyethylene/ethylene vinylacetate laminates[J].IEEE transactions on dielectrics and electrical insulation: A publication of the IEEE Dielectrics and Electrical Insulation Society,1996(6):758-764. |
[5] | Tatsuo Takada;Yuji Hayase;Yasuhiro Tanaka;Tatsuki Okamoto .Space Charge Trapping in Electrical Potential Well Caused by Permanent and Induced Dipoles for LDPE/MgO Nanocomposite[J].IEEE transactions on dielectrics and electrical insulation: A publication of the IEEE Dielectrics and Electrical Insulation Society,2008(1):152-160. |
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