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Electrical properties of ZnO/alumina nano composites for high voltage transmission line insulator

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Abstract

The main aim of the present study is to evaluate the impact of the nano-ZnO on the dielectric properties of alumina bodies used in high voltage insulators. In this work, Zinc oxide/alumina nanocomposites were prepared by sol–gel method. The ratios of ZnO were 5, 6 and 7 mass %. The effect of ZnO on the densification, microstructure, mechanical and electrical properties of the prepared bodies were evaluated after sintering at a temperature ranging from 1550 to 1750 °C. Results revealed that incorporation of 7 mass % ZnO enhanced the breakdown voltage, electric resistivity and the dielectric loss, which are the most important factors to evaluate high-voltage insulators. In addition, incorporation of 7 mass % ZnO enhanced the densification and mechanical properties of the alumina nano composites .

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Authors and Affiliations

  1. Ceramics Department, National Research Centre, El-Bohous Str., Cairo, 12622, Egypt

    N. El-Mehalawy, M. Awaad & S. M. Naga

  2. Faculty of Engineering, Shoubra, Benha University, Banha, Egypt

    T. Eliyan & M. A. Abd-Allah

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  1. N. El-Mehalawy
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  2. M. Awaad
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  3. T. Eliyan
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  5. S. M. Naga
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Correspondence to S. M. Naga.

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El-Mehalawy, N., Awaad, M., Eliyan, T. et al. Electrical properties of ZnO/alumina nano composites for high voltage transmission line insulator. J Mater Sci: Mater Electron 29, 13526–13533 (2018). https://doi.org/10.1007/s10854-018-9480-7

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