Dielectric and Ferroelectric Properties of Bi2.9Pr0.9Ti2.97V0.03O12
Bi2.9Pr0.9Ti2.97V0.03O12 (BPTV) 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.BPTV caused a large shift of the Curie temperature (Tc) of Bi4Ti3O12 (BIT) from 675℃ to 385℃.The remanent polarization and the coercive field of the BLTV were 31μC/cm2 and 60kV/cm at an electric field of 100kV/cm,respectively.Furthermore,the dielectric permittivity and dissipation factor were 300 and 3.3 × 10-3 at 1MHz,at 1V and at room temperature,respectively.These ferroelectric properties of BPTV are superior to V-doped Bi4Ti3O12 (~20μC/cm2 and 80kV/cm) and (Sr,Ta)-doped Bi4Ti3O12 (~12μaC/cm2 and 71kV/cm) ceramics.In addition,the dense ceramics of BPTV could be obtained by sintering at temperatures 100-200℃ lower than those of the SrBi2Ta2O9 system.
Ferroelectric Dielectric Doping Ceramic
J.G.Liu X.A.Mei C.Q.Huang J.Liu
School of Physics and Electronics,Hunan Institute of Science and Technology,Yueyang,414000,China
国际会议
桂林
英文
166-169
2012-07-16（万方平台首次上网日期，不代表论文的发表时间）