AMO-UoS Goulas R1.pdf (1.45 MB)
Additively manufactured ultra-low sintering temperature, low loss Ag2Mo2O7 ceramic substrates
journal contribution
posted on 2020-09-02, 15:25 authored by Athanasios GoulasAthanasios Goulas, George Chi-Tangyie, Dawei Wang, Shiyu Zhang, Annapoorani Ketharam, Vaidhy VaidhyanathanVaidhy Vaidhyanathan, Ian M Reaney, Darren Cadman, William WhittowWilliam Whittow, J. C. Vardaxoglou, Daniel EngstromDaniel EngstromUltra-low sintering temperature silver molybdenum oxide (Ag2Mo2O7) ceramics have been printed using direct ink writing (a material extrusion additive manufacturing process) for the first time. An optimum densification conditions of 460 °C / 2 h was determined, resulting in relative permittivity, εr = 13.45, dielectric loss, tanδ = 0.0005, microwave quality factor, Q × f = 17,056 GHz and the temperature coefficient of resonant frequency τf = −121 ppm/°C. The results were comparable to the dielectric properties of conventionally fabricated ceramics. A series of metal/ceramic antenna designs were produced via dual-printing and co-firing, to demonstrate the potential of Ag2Mo2O7, to be used as a co-firable dielectric material for functional integrated circuits and/or microwave RF devices through multi-material direct ink writing.
Funding
EPSRC research grant SYMETA (EP/N010493/1).
History
School
- Mechanical, Electrical and Manufacturing Engineering
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Published in
Journal of the European Ceramic SocietyVolume
41Issue
1Pages
394 - 401Publisher
Elsevier LtdVersion
- AM (Accepted Manuscript)
Rights holder
© Crown CopyrightPublisher statement
This paper was accepted for publication in the journal Journal of the European Ceramic Society and the definitive published version is available at https://doi.org/10.1016/j.jeurceramsoc.2020.08.031.Acceptance date
2020-08-15Publication date
2020-08-20Copyright date
2020ISSN
0955-2219eISSN
1873-619XPublisher version
Language
- en