Wang, D. orcid.org/0000-0001-6957-2494, Chen, J., Wang, G. et al. (7 more authors) (2020) Cold sintered LiMgPO4 based composites for low temperature co‐fired ceramic (LTCC) applications. Journal of the American Ceramic Society, 103 (11). pp. 6237-6244. ISSN 0002-7820
Abstract
Cold sintered, Li2MoO4‐based ceramics have recently been touted as candidates for electronic packaging and low temperature co‐fired ceramic (LTCC) technology but MoO3 is an expensive and endangered raw material, not suited for large scale commercialisation. Here, we present cold sintered temperature‐stable composites based on LiMgPO4 (LMP) in which the Mo (and Li) concentration has been reduced, thereby significantly decreasing raw material costs. Optimum compositions, 0.5LMP‐0.1CaTiO3‐0.4K2MoO4 (LMP‐CTO‐KMO), achieved 97% density at <300 °C and 600 MPa for 60 mins. Raman spectroscopy, X‐ray diffraction, scanning electron microscopy and energy dispersive X‐ray mapping confirmed the coexistence of end‐members, LMP, CTO and KMO, with no interdiffusion and parasitic phases. Composites exhibited temperature coefficient of resonant frequency ~ –6 ppm/°C, relative permittivity ~ 9.1 and Q×f values ~ 8,500 GHz, properties suitable for LTCC technology and competitive with commercial incumbents.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Authors. Journal of the American Ceramic Society published by Wiley Periodicals, Inc. on behalf of American Ceramic Society (ACERS). This is an open access article under the terms of the Creative Commons Attribution License, (http://creativecommons.org/licenses/by/4.0/) which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | microwave dielectric ceramics; LTCC; phosphates; cold sintering |
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: | 06 Jul 2020 14:16 |
Last Modified: | 21 Oct 2021 16:20 |
Status: | Published |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1111/jace.17320 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:162917 |