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

LI, Ming, FETEIRA, Antonio, MIRSANEH, Mehdi, LEE, Soonil, LANAGAN, Michael T., RANDALL, Clive A. and SINCLAIR, Derek C. (2010). Influence of nonstoichiometry on extrinsic electrical conduction and microwave dielectric loss of BaCo1/3Nb2/3O3 ceramics. Journal of the American Ceramic Society, 93 (12), 4087-4095.

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Official URL: http://dx.doi.org/10.1111/j.1551-2916.2010.03999.x
Link to published version:: 10.1111/j.1551-2916.2010.03999.x

Abstract

The microwave (MW) dielectric loss (or quality factor, Q) of BaCo1/3Nb2/3O3 (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.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1111/j.1551-2916.2010.03999.x
Depositing User: Hilary Ridgway
Date Deposited: 06 Jun 2012 10:46
Last Modified: 06 Jun 2012 10:46
URI: http://shura.shu.ac.uk/id/eprint/5315

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