Space charge properties of micro and nano SiO2/low density polyethylene composites

被引：0

作者：

Wang M. ^{[1
]}

Cheng R. ^{[2
]}

Gao J. ^{[1
]}

Zhang X. ^{[1
]}

机构：

[1] Key Laboratory of Engineering Dielectrics and Its Application, Harbin University of Science and Technology, Harbin

[2] State Grid Dongying Power Supply Company, Dongying

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2019年 / 36卷 / 11期

关键词：

Composites; Low density polyethylene; SiO[!sub]2[!/sub; Space charge; Trap;

D O I：

10.13801/j.cnki.fhclxb.20190401.002

中图分类号：

学科分类号：

摘要：

The development of high voltage direct current (HVDC) transmission is limited on account of the space charge accumulation in HVDC insulation. The effects of nano SiO2, micro SiO2, micro and nano SiO2 and the preparation process on the space charge behavior in SiO2/low density polyethylene (LDPE) composites were investigated. The microstructure and crystallization characteristics of different SiO2/LDPE composites were characterized by SEM, FTIR and DSC. The trap characteristics of SiO2/LDPE composites were studied using thermally stimulated current (TSC). The space charge behavior in the pure LDPE and SiO2/LDPE composites were investigated by electro-acoustic pulse (PEA) technique. The results show that the grain size of LDPE is reduced by the introduction of SiO2, and the crystallinity is increased. The area under TSC curves of SiO2/LDPE composites increases, the TSC peaks of micro SiO2/LDPE composites shift to lower temperature, and those of SiO2/LDPE composites with nano SiO2 move higher temperature. All SiO2/LDPE composites exhibit the effect inhibiting space charge to some extent. The preparation process of micro and nano SiO2/LDPE composite has certain influence on its performance. When the micro and nano SiO2/LDPE composite is prepared in the form of masterbatch, its performance is closer to the composite corresponding to the inorganic particles added later. © 2019, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.

引用

页码：2541 / 2551

页数：10

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