University of Oulu

L.K. Namitha, M.T. Sebastian, High permittivity ceramics loaded silicone elastomer composites for flexible electronics applications, Ceramics International, Volume 43, Issue 3, 2017, Pages 2994-3003, ISSN 0272-8842,

High permittivity ceramics loaded silicone elastomer composites for flexible electronics applications

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Author: Namitha, L.K.1; Sebastian, M.T.1,2
Organizations: 1Materials Science and Technology Division, CSIR NIIST, Trivandrum 695019, India
2Microelectronics Research Unit, University of Oulu, Oulu 90014, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.3 MB)
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Language: English
Published: Elsevier, 2017
Publish Date: 2019-02-15


The dielectric properties of silicone elastomer composites are important in designing flexible electronic devices. The recent explosive growth in wireless communication, automotive and biomedical applications increases the demand for flexible dielectric materials. However, it is very difficult to identify a homogeneous material which possesses these desired properties. Flexible silicone rubber- ceramic composites based BaTiO₃ (BT), SrTiO₃ (ST) and Ca(₁₋ₓ)Nd(₂ₓ/₃)TiO₃ (CNT) ceramic fillers have been prepared. The relative permittivity, thermal conductivity and water absorption increase whereas the coefficient of linear thermal expansion decrease as the volume fraction of filler increases. In the case of dielectric loss; a decreasing trend is shown by SR-ST and SR-CNT composites with filler volume fraction whereas SR-BT composites show a reverse trend since BT is a lossy material. The composites have εr in the range 3–14 in the microwave frequency range. The composites with high filler loading are suitable candidates for core of flexible dielectric waveguide and embedded capacitor applications and the composites with ST and CNT are suitable for cladding of flexible dielectric waveguide and also for microwave substrate applications.

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Series: Ceramics international
ISSN: 0272-8842
ISSN-E: 1873-3956
ISSN-L: 0272-8842
Volume: 43
Issue: 3
Pages: 2994 - 3003
DOI: 10.1016/j.ceramint.2016.11.080
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
213 Electronic, automation and communications engineering, electronics
Copyright information: © 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license