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Dielectric performance of composites of BaTiO 3 and polymers for capacitor applications under microwave frequency
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Basturk, S. Bahar, Dancer, Claire E. J. and McNally, Tony (2021) Dielectric performance of composites of BaTiO 3 and polymers for capacitor applications under microwave frequency. Journal of Applied Polymer Science, 138 (22). 50521. doi:10.1002/app.50521
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WRAP-Dielectric-performance-composites-BaTiO 3-polymers-microwave-frequency-2021.pdf - Accepted Version - Requires a PDF viewer. Download (1786Kb) | Preview |
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Official URL: http://dx.doi.org/10.1002/app.50521
Abstract
Composites of nano‐sized barium titanate (BaTiO3) with volume fractions up to 0.5 and poly(butylene terephthalate) (PBT) or linear low‐density polyethylene (LLDPE) were made via extrusion. Scanning electron microscopy demonstrated that BaTiO3 is well dispersed in the polymer matrices. The crystalline content (DSC) and thermal stability (TGA) of both polymers decreased with increasing BaTiO3 loading. Dielectric properties of the composites were measured using a vector network analyzer. Both dielectric permittivity and tangent loss increased with increasing BaTiO3 content. At 2.45 GHz, the dielectric permittivity for 48 vol% BaTiO3‐filled LLDPE and 43 vol% BaTiO3‐filled PBT was 25 and 21.2, respectively. There was a good fit between the Lichtenecker model and experimental data obtained up to a certain value, with the permittivity variations being dependent on volume fraction. The improved dielectric performance achieved on inclusion of BaTiO3 confirms both composite systems as potential candidates for microwave frequency capacitor applications.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Library of Congress Subject Headings (LCSH): | Dielectrics, Composite materials, Polymers, Capacitors, Microwaves | ||||||||
| Journal or Publication Title: | Journal of Applied Polymer Science | ||||||||
| Publisher: | John Wiley & Sons, Inc. | ||||||||
| ISSN: | 0021-8995 | ||||||||
| Official Date: | 10 June 2021 | ||||||||
| Dates: |
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| Volume: | 138 | ||||||||
| Number: | 22 | ||||||||
| Article Number: | 50521 | ||||||||
| DOI: | 10.1002/app.50521 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Reuse Statement (publisher, data, author rights): | "This is the peer reviewed version of the following article: Basturk, SB, Dancer, CEJ, McNally, T. Dielectric performance of composites of BaTiO3 and polymers for capacitor applications under microwave frequency. J Appl Polym Sci. 2021;e50521., which has been published in final form at https://doi.org/10.1002/app.50521. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions." | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| RIOXX Funder/Project Grant: |
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