摘要
The microstructure and dielectric properties of Ag（Nb0.8Ta0.2）1-x（Mn0.5W0.5）xO3（x=0,0.04,0.08,0.12,0.16） ceramic system were investigated.The Ag（Nb0.8Ta0.2）1-x（Mn0.5W0.5）xO3 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）xO3 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）xO3 ceramics decreased from 1 080 ℃ to 1 000 ℃ when x increased from 0 to 0.16.Ag（Nb0.8Ta0.2）1-x（Mn0.5W0.5）xO3 ceramic was found to have the best dielectric properties when x=0.08,larger permittivity（■=547） and smaller dielectric loss（tan■=0.00156）.
The microstructure and dielectric properties of Ag（Nb0.8Ta0.2）1-x（Mn0.5W0.5）xO3（x=0,0.04,0.08,0.12,0.16） ceramic system were investigated.The Ag（Nb0.8Ta0.2）1-x（Mn0.5W0.5）xO3 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）xO3 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）xO3 ceramics decreased from 1 080 ℃ to 1 000 ℃ when x increased from 0 to 0.16.Ag（Nb0.8Ta0.2）1-x（Mn0.5W0.5）xO3 ceramic was found to have the best dielectric properties when x=0.08,larger permittivity（■=547） and smaller dielectric loss（tan■=0.00156）.
