Zhou, D., Li, J., Pang, L.X. et al. (2 more authors) (2017) Novel water insoluble (NaxAg2-x) MoO4 (0 <= x <= 2) microwave dielectric ceramics with spinel structure sintered at 410 degrees. Journal of Materials Chemistry C, 5 (24). pp. 6086-6091. ISSN 2050-7526
Abstract
In the present work, a novel series of water insoluble ultra-low temperature firing (Na,Ag)2MoO4 microwave dielectrics were prepared via the traditional solid state reaction method. A spinel structured solid solution was formed in the full composition range in the (NaxAg2−x)MoO4 (0 ≤ x ≤ 2). As x increased from 0 to 2.0, cell volume decreased linearly from 9.32 Å to 9.10 Å. Sintering behavior were described using a so-called ‘bowing’ effect and densification was achieved below 420 °C for 0.5 ≤ x ≤ 1.2 with grain size, 1 to 5 μm. Optimum microwave dielectric properties were obtained for (Na1.2Ag0.8)MoO4 ceramics sintered at 410 °C with a permittivity ∼8.1, a microwave quality factor ∼44 800 GHz and the temperature coefficient of the resonant frequency ∼−82 ppm °C−1 at 13.9 GHz. Silver within the solid solution inhibited hydrolyzation of ceramics and also reduced their sintering temperature. Compared with the sintering temperatures of traditional microwave dielectric ceramic (Al2O3, >1400 °C) and normal low temperature co-fired ceramics (<960 °C), this system will save lots of energy during processing and accelerate developments of sustainable electronic materials and devices.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Royal Society of Chemistry. This is an author produced version of a paper subsequently published in Journal of Materials Chemistry C . Uploaded in accordance with the publisher's self-archiving policy. |
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: | 02 Aug 2017 09:01 |
Last Modified: | 01 Jun 2018 00:39 |
Published Version: | https://doi.org/10.1039/c7tc01718a |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Refereed: | Yes |
Identification Number: | 10.1039/c7tc01718a |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:119680 |