Muhammad, R., Iqbal, Y. and Reaney, I.M. (2016) BaTiO3–Bi(Mg2/3Nb1/3)O3 Ceramics for High-Temperature Capacitor Applications. Journal of the American Ceramic Society, 99 (6). pp. 2089-2095. ISSN 1551-2916
Abstract
Solid solutions of (1−x)BaTiO3–xBi(Mg2/3Nb1/3)O3 (0 ≤ x ≤ 0.6) were prepared via a standard mixed-oxide solid-state sintering route and investigated for potential use in high-temperature capacitor applications. Samples with 0.4 ≤ x ≤ 0.6 showed a temperature independent plateau in permittivity (εr). Optimum properties were obtained for x = 0.5 which exhibited a broad and stable relative εr ~940 ± 15% from ~25°C to 550°C with a loss tangent <0.025 from 74°C to 455°C. The resistivity of samples increased with increasing Bi(Mg2/3Nb1/3)O3 concentration. The activation energies of the bulk were observed to increase from 1.18 to 2.25 eV with an increase in x from 0 to 0.6. These ceramics exhibited excellent temperature stable dielectric properties and are promising candidates for high-temperature multilayer ceramic capacitors for automotive applications.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The American Ceramic Society. This is an author produced version of a paper subsequently published in Journal of the American Ceramic Society. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | dielectric materials/properties; electroceramics ;lead-free ceramics; impedance spectroscopy |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 23 Mar 2016 17:58 |
Last Modified: | 02 Jul 2017 06:19 |
Published Version: | http://dx.doi.org/10.1111/jace.14212 |
Status: | Published |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1111/jace.14212 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:97065 |