中国物理B ›› 1997, Vol. 6 ›› Issue (12): 913-920.doi: 10.1088/1004-423X/6/12/005

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

DIELECTRIC RELAXATION BEHAVIOR OF CERAMICS IN THE Pb(Zn1/3Nb2/3)O3-BaTiO3-PbTiO3 SYSTEM

岳振星, 王晓莉, 张良莹, 姚熹   

  1. Electronic Materials Research Laboratory, Xi′an Jiaotong University, Xi′an 710049, China
  • 收稿日期:1997-05-04 修回日期:1997-01-28 出版日期:1997-12-20 发布日期:1997-12-20

DIELECTRIC RELAXATION BEHAVIOR OF CERAMICS IN THE Pb(Zn1/3Nb2/3)O3-BaTiO3-PbTiO3 SYSTEM

YUE ZHEN-XING (岳振星), WANG XIAO-LI (王晓莉), ZHANG LIANG-YING (张良莹), YAO XI (姚熹)   

  1. Electronic Materials Research Laboratory, Xi′an Jiaotong University, Xi′an 710049, China
  • Received:1997-05-04 Revised:1997-01-28 Online:1997-12-20 Published:1997-12-20

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摘要： The dielectric properties of ceramics in Pb(Zn1/3Nb2/3)O3-BaTiO3-PbTiO3 system were characterized using dielectric-temperature spectra. A spontaneous (zero field) relaxor-normal ferroelectric tran sition was observed for tetragonal rich compositions. A significant hysteresis effect accompanied by this transition, similar to first-order phase transition of normal ferroelectrics. This behavior was different from that of other relaxors, in which such transitions occurred only under a biased dc field. This observation was explained in terms of a thermally driven transformation from an ensemble of polar microregions to normal long-range ferroelectric state (micro-macro domain transition), which was attributed to the internal field resulting from the tetragonal strain.

Abstract: The dielectric properties of ceramics in Pb(Zn1/3Nb2/3)O3-BaTiO3-PbTiO3 system were characterized using dielectric-temperature spectra. A spontaneous (zero field) relaxor-normal ferroelectric tran sition was observed for tetragonal rich compositions. A significant hysteresis effect accompanied by this transition, similar to first-order phase transition of normal ferroelectrics. This behavior was different from that of other relaxors, in which such transitions occurred only under a biased dc field. This observation was explained in terms of a thermally driven transformation from an ensemble of polar microregions to normal long-range ferroelectric state (micro-macro domain transition), which was attributed to the internal field resulting from the tetragonal strain.

中图分类号:  (Dielectric loss and relaxation)

  • 77.22.Gm
77.80.Dj (Domain structure; hysteresis) 77.22.Ch (Permittivity (dielectric function))