Silicate dielectric ceramics for millimetre wave applications. Issue 7 (July 2021)

• Record Type: Journal Article
• Authors: Kamutzki, Franz; Schneider, Sven; Barowski, Jan; Gurlo, Aleksander; Hanaor, Dorian A.H.
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 7(2021)
• Page Start: 3879
• Page End: 3894
• Publication Date: 2021-07
• Subjects: Silicate ceramics -- Millimetre wave -- Dielectrics -- Quality factor -- Permittivity; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2021.02.048
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Silicate ceramics are of considerable promise as high frequency dielectrics in emerging millimetre wave applications including high bandwidth wireless communication and sensing. In this review, we show how high quality factors and low, thermally stable permittivities arise in ordered silicate structures. On the basis of a large number of existing studies, the dielectric performance of silicate ceramics is comprehensively summarized and presented, showing how microstructure and SiO4 tetrahedral connectivity affect polarizability and dielectric losses. We critically examine the appropriateness of silicate materials in future applications as effective millimetre wave dielectrics with low losses and tuneable permittivities. The development of new soft chemistry based processing routes for silicate dielectric ceramics is identified as being instrumental towards the reduction of processing temperatures, thus enabling silicate ceramics to be co-fired in the production of components functioning in the mm wave regime.