Abstract
The ethylene–propylene–diene monomer (EPDM) has been widely used in HVDC cables accessories. The nonlinear conductivity of EPDM-based composites plays an important role on relieving the distortion of electric field. In this study, the zinc oxide (ZnO) particles are selected as fillers for improving the nonlinear conductivity of EPDM. The result shows that nonlinear conductivity characteristics of ZnO/EPDM becomes more and more pronounced with the increase of ZnO doping content, however, the breakdown strength of ZnO/EPDM composites has been seriously deteriorated with the increase of ZnO doping content. The excellent breakdown strength of composites is very important for ensuring the safe operation of cable accessories, so the hexagonal boron nitride (h-BN) with good electrical insulation has been employed for improving the breakdown strength of ZnO/EPDM. The results indicate that both of non-linear conductivity and good breakdown strength have been obtained in ZnO–h composite-BN/EPDM composites. This work provides a novel way for constructing the composites with excellent electrical performances which are used for cable accessories.
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Acknowledgement
This work is supported by the National Science Foundation of China (61640019); Engineering Dielectric and Its Applications Key Laboratory of Ministry of Education Frontier Project Pre-research Fund Project (2018EDAQY01, 2018EDAQY02); Engineering Dielectrics and Applications Key Project of Ministry of Education Open Fund Project (KF20171108).
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Chi, Q., Hao, Y., Zhang, T. et al. Study on nonlinear conductivity and breakdown characteristics of zinc oxide–hexagonal boron nitride/EPDM composites. J Mater Sci: Mater Electron 29, 19678–19688 (2018). https://doi.org/10.1007/s10854-018-0093-y
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DOI: https://doi.org/10.1007/s10854-018-0093-y