Influence of nonstoichiometry on extrinsic electrical conduction and microwave dielectric loss of BaCo1/3Nb2/3O3 ceramics

Ming Li, Antonio Feteira, Mehdi Mirsaneh, Soonil Lee, Michael T. Lanagan, Clive A. Randall, Derek C. Sinclair

Research output: Contribution to journalArticle

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Abstract

The microwave (MW) dielectric loss (or quality factor, Q) of BaCo 1/3Nb2/3O3 (BCN) ceramics exhibits a strong dependence on sample-processing conditions and is not always consistent with the degree of 1:2 B-site cation ordering. Impedance spectroscopy results reveal that these BCN ceramics exhibit remarkably different electrical properties due to low levels of nonstoichiometry induced during ceramic processing. These compositional changes are difficult to detect by common chemical techniques but can have a significant influence on the electrical properties, and in particular on the extrinsic electrical conduction and Q. The influence of extrinsic conduction induced by ceramic processing should therefore be considered when optimizing Q in MW dielectric ceramics.

Original languageEnglish (US)
Pages (from-to)4087-4095
Number of pages9
JournalJournal of the American Ceramic Society
Volume93
Issue number12
DOIs
StatePublished - Dec 1 2010

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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