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

doi:10.1111/j.1551-2916.2010.03999.x

Influence of nonstoichiometry on extrinsic electrical conduction and microwave dielectric loss of BaCo_1/3Nb_2/3O₃ ceramics

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

Research output: Contribution to journal › Article › peer-review

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Abstract

The microwave (MW) dielectric loss (or quality factor, Q) of BaCo _1/3Nb_2/3O₃ (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 language	English (US)
Pages (from-to)	4087-4095
Number of pages	9
Journal	Journal of the American Ceramic Society
Volume	93
Issue number	12
DOIs	https://doi.org/10.1111/j.1551-2916.2010.03999.x
State	Published - Dec 2010

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/j.1551-2916.2010.03999.x

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

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.",

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AU - Li, Ming

AU - Feteira, Antonio

AU - Mirsaneh, Mehdi

AU - Lee, Soonil

AU - Lanagan, Michael T.

AU - Randall, Clive A.

AU - Sinclair, Derek C.

PY - 2010/12

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AB - 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.

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Influence of nonstoichiometry on extrinsic electrical conduction and microwave dielectric loss of BaCo_1/3Nb_2/3O₃ ceramics

Abstract

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