DC conduction and electrical breakdown of MgO/LDPE nanocomposite
DC conduction and electrical breakdown of MgO/LDPE nanocomposite
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DOI：
10.1109/ceidp.2007.4451630
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发表时间：
2007-10
期刊：
影响因子：
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通讯作者：
S. Masuda;S. Okuzumi;R. Kurniant;Y. Murakami;M. Nagao;Y. Murata;Y. Sekiguchi
中科院分区：
文献类型：
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作者：
S. Masuda;S. Okuzumi;R. Kurniant;Y. Murakami;M. Nagao;Y. Murata;Y. Sekiguchi
为了了解纳米氧化镁(MgO)/低密度聚乙烯(LDPE)纳米复合材料在直流电压作用下的基本电学性能，对其体积电阻率、空间电荷分布、击穿强度和短路树进行了研究。加入纳米氧化镁后，LDPE的直流击穿强度和体积电阻率均有所提高。在约120kV/mm的平均直流电场下，未添加纳米氧化镁的LDPE中观察到正的包状空间电荷，而在电极前方的氧化镁/低密度聚乙烯纳米复合材料中观察到少量均匀的空间电荷。纳米氧化镁的加入降低了短路树的萌生概率。同时，添加纳米氧化镁的薄膜中短路树枝的长度也比不添加纳米氧化镁的薄膜短。结果表明，纳米氧化镁的加入改善了LDPE的直流绝缘性能。
To understand basic electric properties of nano-sized magnesium oxide (MgO)/low-density polyethylene (LDPE) nanocomposite under DC voltage application, the volume resistivity, the space charge distribution, the breakdown strength and the short circuit tree were investigated. By the addition of nano-sized MgO filler, both the DC breakdown strength and the volume resistivity of LDPE increased. At the average DC electric field of about 120 kV/mm, a positive packet-like space charge was observed in LDPE without MgO nano-filler, whereas a little homogeneous space charge was observed in MgO/LDPE nanocomposite material at the front of electrode. The initiation probability of short circuit tree is decreased by addition of MgO nano-filler. And also, the length of short-circuit tree in the film with MgO nano-filler is shorter than that without MgO nano-filler. From these results, it is confirmed that the addition of MgO nano-filler leads to the improvement of DC electrical insulating properties of LDPE.