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  • Greijer, HelenaHitachi, Ltd. (author)

Tuneable conductivity at extreme electric fields in ZnO tetrapod-silicone composites for high-voltage power cable insulation

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-04-11
  • Springer Science and Business Media LLC,2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:bbbe53ea-62a6-4ee3-98b6-d9b63591b494
  • https://research.chalmers.se/publication/530052URI
  • https://doi.org/10.1038/s41598-022-09966-4DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Resistive Field Grading Materials (RFGM) are used in critical regions in the electrical insulation system of high-voltage direct-current cable systems. Here, we describe a novel type of RFGM, based on a percolated network of zinc oxide (ZnO) tetrapods in a rubber matrix. The electrical conductivity of the composite increases by a factor of 108 for electric fields > 1 kV mm-1, as a result of the highly anisotropic shape of the tetrapods and their significant bandgap (3.37 eV). We demonstrate that charge transport at fields < 1 kV mm-1 is dominated by thermally activated hopping of charge carriers across spatially, as well as energetically, localized states at the ZnO-polymer interface. At higher electric fields (> 1 kV mm-1) band transport in the semiconductive tetrapods triggers a large increase in conductivity. These geometrically enhanced ZnO semiconductors outperform standard additives such as SiC particles and ZnO micro varistors, providing a new class of additives to achieve variable conductivity in high-voltage cable system applications.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Mirotta, NicolaIstituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR),Institute for organic syntheses and photoreactivity (ISOF-CNR) (author)
  • Treossi, E.Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR),Institute for organic syntheses and photoreactivity (ISOF-CNR) (author)
  • Valorosi, FilippoIstituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR),Institute for organic syntheses and photoreactivity (ISOF-CNR) (author)
  • Schütt, FabianChristian-Albrechts-Universität zu Kiel,University of Kiel (author)
  • Siebert, LeonardChristian-Albrechts-Universität zu Kiel,University of Kiel (author)
  • Mishra, Yogendra KumarSyddansk Universitet,University of Southern Denmark (author)
  • Adelung, RainerChristian-Albrechts-Universität zu Kiel,University of Kiel (author)
  • Palermo, Vincenzo,1972Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR),Institute for organic syntheses and photoreactivity (ISOF-CNR),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)palermo (author)
  • Hillborg, HenrikHitachi, Ltd. (author)
  • Hitachi, Ltd.Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR) (creator_code:org_t)

Related titles

  • In:Scientific Reports: Springer Science and Business Media LLC12:1, s. 6035-2045-23222045-2322

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