Electrical Characteristics and Microstructures of Pr6O11-doped Bi4Ti3O12 Ceramics
The electrical properties of Pr6O11-doped bismuth titanates (BixPryTi3O12,BPT) ceramics prepared by a conventional ceramic technique have been investigated.At applied d.c.field below 200V/mm,the current-voltage curve of Pr-doped samples exhibit negative differential resistance behavior.The conducting filamentary model has been used to explain the negative differential resistance phenomenon in Pr-doped bismuth titanates.The impedance spectrum indicates that Pr-doped sample consists of semiconducting grain and moderately insulating grain boundary regions.XRD,SEM and EPMA analyses reveal crystalline phase characterized by a Bi-layered perovskite structure of Bi4Ti3O12 and the distribution of every element is uniform.Pr-doped samples exhibit randomly oriented and plate-like morphology.
Microstructure Impedance Electrical properties Bismuth titanate
M.Chen X.A.Mei R.F.Liu C.Q.Huang J.Liu
School of Physics and Electronics,Hunan Institute of Science and Technology,Yueyang,414000,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1313-1316
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）