Synthesis of monoclinic CaSnSiO5 ceramics and their microwave dielectric properties

• Published in: Materials letters Vol. 91; no. 15; pp. 239 - 241
• Main Authors: Wu, S.P., Chen, D.F., Jiang, C., Mei, Y.X., Ma, Q.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-01-2013
• Subjects: CaSnSiO5; ceramics; dielectric properties; Dielectrics; Electroceramics; Microstructure; Microwave properties; temperature; Microwave properties; Dielectrics; Microstructure; CaSnSiO5; Electroceramics
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2012.09.065

The monoclinic CaSnSiO5 phase could be synthesized with a conventional solid state method. The molar ratio of Ca:Sn:Si=1:1.05:1 was employed to synthesize pure CaSnSiO5 ceramics through non-stoichiometric effect. The CaSnSiO5 ceramics sintered at 1525°C exhibited microwave dielectric properties: a dielectric constant (εr) of 9.08, a quality factor (Q×f) of 61,000GHz and a temperature coefficient of resonant frequency (τf) of 35ppm/°C. They are promising millimeter-wave ceramic materials.
► Monoclinic CaSnSiO5 ceramics were synthesized with a solid-state method. ► Pure CaSnSiO5 ceramics were synthesized by non-stoichiometric effect. ► High relative density and normal microstructure resulted in excellent properties.► Microwave properties of CaSnSiO5: εr=9.08, Q×f=61,000GHz and τf=35ppm/°C. ► CaSnSiO5 ceramics are promising millimeter-wave ceramic materials.