Zeb, A and Milne, SJ (2017) High Temperature Dielectrics in the Ceramic System K₀.₅Bi₀.₅TiO₃-Ba(Zr₀.₂Ti₀.₈)O₃-Bi(Zn₂⁄₃Nb₁⁄₃)O₃. Ceramics International, 43 (10). pp. 7724-7727. ISSN 0272-8842
Abstract
Ceramics in the system (1-x)[0.5 K₀.₅Bi₀.₅TiO₃-0.5Ba(Zr₀.₂Ti₀.₈)O₃]-xBi(Zn₂⁄₃Nb₁⁄₃)O₃ have been fabricated by a solid-state processing route for compositions x ≤ 0.3. The materials are relaxor dielectrics. The temperature of maximum relative permittivity, Tm, decreased from 150 °C for composition x = 0, to 70 °C for x = 0.2. The x = 0.2 sample displayed a wide temperature range of stable relative permittivity, εr, such that εr = 805 ± 15% from −20 °C to 600 °C (1 kHz). Dielectric loss tangent was ≤ 0.02 from 50 °C to 450 °C (1 kHz), but due to the tanδ dispersion peak, the value increased to 0.09 as temperatures fell from 50 °C to −20 °C. Values of dc resistivity were of the order of ~ 109 Ω m at 300 °C. These properties are promising in the context of developing new high temperature capacitor materials.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 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; ceramics capacitors; resistivity |
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: | 16 Mar 2017 10:16 |
Last Modified: | 15 Mar 2018 01:40 |
Published Version: | https://doi.org/10.1016/j.ceramint.2017.03.076 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ceramint.2017.03.076 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:113694 |