Effects of the sodium ions addition on the varistor properties of ZnO–Co3O4–Pr6O11 ceramics

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Abstract

The effects of Na+ ions addition on the crystalline phases, microstructures, and varistor characteristics of ZnO–Co3O4–Pr6O11 ceramics were investigated using an X-ray diffractometer (XRD), scanning electron microscopy (SEM), and the electron probe microanalysis method (EPMA). The results indicate that the oxygen vacancies existing in Pr6O11 due to the substitution of Na+ for Pr ion could enhance the phase stability of Pr6O11, decrease the evaporation of Pr and promote the oxygen migration along the grain boundaries and oxygen ions chemisorbed at the grain boundaries. Therefore, the addition of sodium ions can effectively enhance the varistor properties of ZnO–Co3O4–Pr6O11 ceramics.

Original languageEnglish
Pages (from-to)28935-28941
Number of pages7
JournalJournal of Materials Science: Materials in Electronics
Volume32
Issue number24
DOIs
Publication statusPublished - 2021 Dec

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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