Zeb A and Milne, SJ (2018) Dielectric stability in the relaxor: Na₀.₅Bi₀.₅TiO₃-Ba₀.₈Ca₀.₂TiO₃-Bi(Mg₀.₅Ti₀.₅)O₃- NaNbO₃ ceramic system. Ceramics International, 44 (7). pp. 7663-7666. ISSN 0272-8842
Abstract
Ceramics with temperature-stable dielectric characteristics have been developed in the system: 0.6[0.85Na0.5Bi0.5TiO3-(0.15-x)Ba0.8Ca0.2TiO3-xBi(Mg0.5Ti0.5)O3]−0.4NaNbO3, x ≤ 0.15. Dielectric measurements exhibited relaxor ferroelectric characteristics with temperature-stable relative permittivity from εr~1330 ± 15% in the temperature range from −70 °C – 215 °C and tanδ ≤ 0.02 from −20 °C to 380 °C for x = 0 compositions. For the Bi(Mg0.5Ti0.5)O3 modified compositions the temperature range of stable relative permittivity extended from −70 °C to 400 °C, with εr ~ 950 ± 15% and tanδ ≤ 0.02 from −70 °C to 260 °C. Values of dc resistivity were ~ 108 Ω m at a temperature of 300 °C and the corresponding RC constant values were in the range from 0.40 − 0.78 s at 300 °C. All ceramic samples exhibited a linear polarisation-electric field response at maximum applied electric field of 5 kV/cm (1 kHz).
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Elsevier Ltd and Techna Group S.r.l. This is an author produced version of a paper published in Ceramics International. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Temperature stable dielectrics; ceramic capacitors; RC constant |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Feb 2018 16:00 |
Last Modified: | 02 Feb 2019 01:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ceramint.2018.01.191 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:127274 |