A novel low-temperature-fired multifunctional varistor-magnetic ferrite materials

Li Then Mei, Hsing-I Hsiang, Hui Wen Ye

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

A novel low temperature-fired (950°C) multifunctional varistor-magnetic fenite materials can be obtained by adding V20O5 into CuCr0.2Fe1.8O4 ferrites. The relationship between the grain-boundary composition and varistor properties were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersion spectroscopy (EDS), and X-ray photoelectric spectroscopy (XPS). The addition of V2O5 can effectively reduce the sintering temperature of CuCr0.2Fe1.8O 4ferrites to temperatures of lower than 950° C. Moreover, the V5+ ions occupied the octahedral site of spinel structure and acted as donor dopant, which resulted in the semiconductive grain. The copper-rich observation at the grain boundary based on the TEM and EDS results implied that copper oxide would possibly develop at the grain boundary as the acceptor state, forming double Schottky barriers with the n-type semiconductor grains.

Original languageEnglish
Pages641-649
Number of pages9
Publication statusPublished - 2012 Dec 1
Event8th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies, CICMT 2012 - Erfurt, Germany
Duration: 2012 Apr 162012 Apr 19

Other

Other8th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies, CICMT 2012
Country/TerritoryGermany
CityErfurt
Period12-04-1612-04-19

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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