Fatigue and Ferroelectric Properties of Bi3.25Gd0.75Ti2.97V0.03O12

摘要

Bi3.25Gd0.75Ti2.97V0.03O12 (BGTV) ceramics were prepared by solid state reaction.These samples had polycrystalline Bi-layered perovskite structure without preferred orientation,and consisted of well developed plate-like grains with random orientation.The remanent polarization and the coercive field of the BGTV were 24μC/cm2 and 65kV/cm at an electric field of 100kV/cm,respectively.These ferroelectric properties of BGTV are superior to V-doped Bi4Ti3O12 (～20μC/cm2 and 80kV/cm) and (Sr,Ta)-doped Bi4Ti3O12 (～12μC/cm2 and 71kV/cm) ceramics.In addition,the dense ceramics of BGTV could be obtained by sintering at temperatures 100-200°C lower than those of the SrBi2Ta2O9 system.