Electrical conductivity of B-site Fe3+doped Na0.5Bi0.49TiO3 ceramic
Na0.5Bi0.49Ti1-xFexO3-δ(NBT) powder materials with x=0,0.02,0.04,and 0.06 were prepared by solid-state synthesis method.Flaky ceramic samples were prepared by pressing and sintering at 1000-1150 ℃.The effect of Fe3+doping amount x on NBT ceramic properties was studied by XRD,SEM and EIS testing.The results show that a new phase NaBiTi6O14 appears in the NBT material after Fe3+doping,and the content increases with the increase of doping amount.After doping,the sintering temperature of the sample decreases by 100-150 ℃,while the grains become smaller.Within the testing temperature range of 300-700 ℃,the conductivity of samples with x=0.02,0.04,and 0.06 is on the same order of magnitude at the same temperature,which are about 1000 times higher than that of samples with x=0.The sample with x=0.04 has the highest conductivity,reaching 9.8 mS/cm and 17.0 mS/cm at the test temperatures of 600 ℃ and 700 ℃,respectively.
Na0.5Bi0.49TiO3Fe3+dopingelectrical conductivityoxygen ion conductor
万方数据
