The microstructure and properties of Ag(Nb0.8Ta0.2)1−x(Mn0.5W0.5)xO3 ceramic system

The microstructure and dielectric properties of Ag(Nb0.8Ta0.2)1−x (Mn0.5W0.5) x O3 (x=0, 0.04, 0.08, 0.12, 0.16) ceramic system were investigated. The Ag(Nb0.8Ta0.2)1−x (Mn0.5W0.5) x O3 ceramics were prepared by the traditional solid-state reaction method and were characterized by X-ray diffraction (XRD), scanning electron microscopy(SEM) and Raman spectrometer. The sintering ability and dielectric properties of Ag(Nb0.8Ta0.2)1−x (Mn0.5W0.5) x O3 were found to be improved with the doping of Mn4+ and W6+ ions. The densification temperature of Ag(Nb0.8Ta0.2)1−x (Mn0.5W0.5) x O3 ceramics decreased from 1 080 °C to 1 000 °C when x increased from 0 to 0.16. Ag(Nb0.8Ta0.2)1−x (Mn0.5W0.5) x O3 ceramic was found to have the best dielectric properties when x=0.08, larger permittivity (ɛ=547) and smaller dielectric loss (tanδ=0.00156).