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A high-resolution transmission electron microscope study of a zinc oxide varistor

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Abstract

Investigations were made of varistor microstructure, the morphology of Bi2O3 at multiple ZnO grain junctions, Bi2O3/ZnO grain boundaries and ZnO/ZnO grain boundaries (especially whether Bi2O3 is present or not at the ZnO/ZnO grain boundary) by means of high-resolution transmission electron microscopy and X-ray microanalysis in the scanning transmission electron microscope. Bi2O3 at multiple ZnO grain junctions consists of small particles of 0.1μm in diameter, and they are vitrified to some extent. It is suggested that bismuth ions dissolve into ZnO grains over a 30 nm range from a Bi2O3/ZnO grain boundary; however, there is no bismuth at ZnO/ZnO grain boundaries.

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Authors and Affiliations

  1. Toshiba Corporation Research and Development Centre, Kawasaki, 210, Kanagawa, Japan

    Hideyuki Kanai, Motomasa Imai & Takashi Takahashi

Authors
  1. Hideyuki Kanai
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  2. Motomasa Imai
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  3. Takashi Takahashi
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Kanai, H., Imai, M. & Takahashi, T. A high-resolution transmission electron microscope study of a zinc oxide varistor. J Mater Sci 20, 3957–3966 (1985). https://doi.org/10.1007/BF00552385

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  • DOI: https://doi.org/10.1007/BF00552385

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