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A link between p-type electrical conduction and microwave dielectric loss in highly ordered Ba(Co1/3Nb2/3)O3 ceramics

  • Ming Li, Antonio Feteira, Mehdi Mirsaneh (a1), Michael T. Lanagan (a2) and Derek C. Sinclair (a1)...
Abstract

BaCo1/3Nb2/3O3 ceramics, with a high density and a similar, high degree of 1:2 B-site cation ordering, exhibit very different quality factors, Q. The ceramics exhibit p-type behavior with higher conductivity and lower Q for samples processed in O2 as compared with those processed in air. It is proposed that unavoidable Co loss during high-temperature ceramic processing leads to p-type doping that must be compensated by oxygen vacancies to impede hole formation. The composition exhibiting only intrinsic conduction and optimized Q is not achieved with processing in atmospheric oxygen due to filling of oxygen vacancies and hole formation during cooling.

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a)Address all correspondence to this author. e‐mail: m.li@sheffield.ac.uk
b)Address all correspondence to this author. e‐mail: D.C.Sinclair@sheffield.ac.uk
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Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
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