Temperature stable 0.35Ag2MoO4-0.65Ag0.5Bi0.5MoO4 microwave dielectric ceramics with ultra-low sintering temperatures

Abstract In this study, the novel temperature-stable (1- x )Ag 2 MoO 4 - x Ag 0.5 Bi 0.5 MoO 4 microwave dielectric ceramics were prepared by a modified solid-state reaction method. The phase composition, microstructures and microwave dielectric properties of the (1- x )Ag 2 MoO 4 - x Ag 0.5 Bi 0.5 MoO 4 ceramics were investigated. All the compounds can be sintered well at ultra-low temperatures ( 2 MoO 4 and the Ag 0.5 Bi 0.5 MoO 4 can coexist with each other. When x  = 0.65, the ceramics exhibit the best microwave dielectric properties with a relative permittivity of 23.9, a Q × f value of 16,200 GHz (at 7.3 GHz) and a near-zero TCF value of -2.4 ppm/°C at 520 °C. The results indicate that temperature-stable (1- x )Ag 2 MoO 4 - x Ag 0.5 Bi 0.5 MoO 4 ceramics are promising candidates for low temperature co-fired ceramics (LTCC) applications.