Study of Dielectric and Mechanical Spectra on Point Defects and Phase Transition in Ferroelectric Ceramics  

作　　者：ZHU J S LI W CHEN K LU X M WANG Y N 

机构地区：[1]National Lab.of Solid State Microstructures,Nanjing University.Nanjing 210093,China

出　　处：《四川大学学报(自然科学版)》2005年第S1期18-18,共1页Journal of Sichuan University(Natural Science Edition)

摘　　要：Ferroelectric materials have enormous potential applications in advanced techniques. However, there are still many problems in its practical application. Dielectric and mechanical (internal friction) measurements are very sensitive to phase transitions, relaxation process of point defects, domain walls and their mobility, which have severe effect on ferroelectric properties. These make them become very good means to investigate substantial information on structural features and to explore the fundamental principles in ferroelectric materials and their applications. In this paper, the dielectric and internal friction measurement were used to investigate the behaviors for point defects and phase transition in ferroelectric ceramics such as Bi_ 4-x La_ x Ti_ 3 O_ 12 , Bi_ 4 Ti_ 3-y Nb_ y O_ 12 , SrBi_ 2 Ti_ 2 O_ 9 , PbZr_ x Ti_ 1-x O_ 3 ,_ PMN-PT. They were used to clarify the mechanism for some ferroelectric behaviors.Ferroelectric materials have enormous potential applications in advanced techniques. However, there are still many problems in its practical application. Dielectric and mechanical (internal friction) measurements are very sensitive to phase transitions, relaxation process of point defects, domain walls and their mobility, which have severe effect on ferroelectric properties. These make them become very good means to investigate substantial information on structural features and to explore the fundamental pr...

关 键 词：Dielectric and mechanic spectra Ferroelectric ceramics Point defects and phase transition. 

分 类 号：TM282[一般工业技术—材料科学与工程]