Sintering behaviour and microwave dielectric properties of BaAl2−2x(ZnSi)xSi2O8 ceramics. Issue 4 (April 2018)

• Record Type: Journal Article
• Authors: Song, Xiao-Qiang; Lu, Wen-Zhong; Wang, Xiao-Chuan; Wang, Xiao-Hong; Fan, Gui-Fen; Muhammad, Raz; Lei, Wen
• Is Part Of: Journal of the European Ceramic Society. Volume 38:Issue 4(2018)
• Page Start: 1529
• Page End: 1534
• Publication Date: 2018-04
• Subjects: BaAl2Si2O8 -- Sintering behaviour -- Microwave dielectric properties; 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.2017.10.053
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: BaAl2−2 x (ZnSi) x Si2 O8 ( x = 0.2–1.0) ceramics were prepared using the conventional solid-state reaction method. The sintering behaviour, phase composition and microwave dielectric properties of the prepared compositions were then investigated. All compositions showed a single phase except for x = 0.8. By substituting (Zn0.5 Si0.5 ) 3+ for Al 3+ ions, the optimal sintering temperatures of the compositions decreased from 1475 °C ( x = 0) to 1000 °C ( x = 0.8), which then slightly increased to 1100 °C ( x = 1.0). Moreover, the phase stability of BaAl2 Si2 O8 was improved. A novel BaZnSi3 O8 microwave dielectric ceramic was obtained at the sintering temperature of 1100 °C. This ceramic possesses good microwave dielectric properties with ε r = 6.60, Q × f = 52401 GHz (at 15.4 GHz) and τ f = −24.5 ppm/°C.