Microstructure and microwave dielectric properties of 3D printed low loss Bi2Mo2O9 ceramics for LTCC applications

Abstract

Low sintering temperature, ultra-low loss microwave ceramics are envisaged as future dielectrics for fabricating low temperature co-fired ceramic (LTCC) components for 5G applications. Low sintering temperature bismuth molybdate β-Bi2Mo2O9 ceramic powders have been synthesised using a solid-state reaction method. Their additive manufacture and resulting microwave properties are reported for the first time. Optimum densification occurred for 3D printed samples sintered 4 hours at 670°C which resulted in a maximum relative density (ρr) of 92%, relative permittivity (εr) of 34, dielectric loss (tanδ) of 0.0007, giving a microwave quality factor (Qxf) of 10,050 GHz, properties attractive for LTCC applications.

Metadata

Authors/Creators:

Goulas, A.
Chi-Tangyie, G.
Wang, D.
Zhang, S.
Ketharam, A.
Vaidhyanathan, B.
Reaney, I.M. https://orcid.org/0000-0003-3893-6544
Cadman, D.A.
Whittow, W.G.
Vardaxoglou, J.Y.C.
Engstrøm, D.S.

© 2020 Elsevier Ltd. This is an author-produced version of a paper subsequently published in Applied Materials Today. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Keywords:

Additive manufacturing; 3D printing; Microwave ceramics; Dielectrics; LTCC; Bi2Mo2O9

Dates: