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Multi-material additive manufacture and microwave-assisted sintering of a metal/ceramic metamaterial antenna structure

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journal contribution
posted on 2023-08-02, 08:11 authored by Athanasios GoulasAthanasios Goulas, Tom WhittakerTom Whittaker, George Chi-Tangyie, Ian Reaney, Daniel Engstrom, William WhittowWilliam Whittow, Bala Vaidhyanathan

Multi-material metal/ceramic 3D structures comprising of metallic silver and ultra-low sintering temperature silver molybdenum oxide ceramics, have been additively manufactured and hybrid densified using microwave-assisted sintering for the first time. Optimum densification conditions at 440°C / 1 hour, resulted in relative permittivity, εr = 10.99 ± 0.04, dielectric losses, tanδ = 0.005 ± 0.001 and microwave quality factor, Q × f = 2597 ± 540 GHz. Applying 2 kW microwave energy at 2.45 GHz for 60 minutes, was proven sufficient, to densify the metallic Ag infilling electrodes, without causing any macroscopic defects. A fully functional multi-layered antenna structure with a metamaterial artificial magnetic conductor was designed, dual-printed and densified, to showcase the potential of combining multi-material additive manufacturing with microwave-assisted sintering.

Funding

SYnthesizing 3D METAmaterials for RF, microwave and THz applications (SYMETA)

Engineering and Physical Sciences Research Council

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History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering
  • Mechanical, Electrical and Manufacturing Engineering

Department

  • Materials

Published in

Applied Materials Today

Volume

33

Publisher

Elsevier

Version

  • VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

2023-07-01

Publication date

2023-07-05

Copyright date

2023

ISSN

2352-9407

eISSN

2352-9415

Language

  • en

Depositor

Dr Thanos Goulas. Deposit date: 4 July 2023

Article number

101878

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