Dielectric relaxation and phase structure in PZN based ferroelectric ceramics  

作　　者：樊慧庆 张良莹 姚熹 

机构地区：[1]Electronic Materials Research Laboratory,Xi'an Jiaotong Univeristy,Xi'an 710049,China

出　　处：《Progress in Natural Science:Materials International》1998年第3期30-36,共7页自然科学进展·国际材料（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No.59232042).

摘　　要：Dielectric behavior of lead zinc niobate （PZN） based ferroelectric ceramics is carefully studied be-tween-100 and 200℃ in cooling and heating measurements. The zero-field spontaneous and field-induced relaxor-normal ferroelectric transitions are observed in this ferroelectric system. X-ray diffraction examinations under differenttemperatures demonstrate that the micro-macrodomain transition corresponds to rhombohedral-tetragonal first-orderphase switching. The region of the （0.9-x）Pb(Zn_1/3Nb_2/3 )O₃-0.1BaTiO₃-xPbTiO₃ （0.0≤x≤0.2） phase dia-gram is established through analysis of structure and dielectric behavior associated with changes in temperatureDielectric behavior of lead zinc niobate （PZN） based ferroelectric ceramics is carefully studied be-tween-100 and 200℃ in cooling and heating measurements. The zero-field spontaneous and field-induced relaxor-normal ferroelectric transitions are observed in this ferroelectric system. X-ray diffraction examinations under differenttemperatures demonstrate that the micro-macrodomain transition corresponds to rhombohedral-tetragonal first-orderphase switching. The region of the （0.9-x）Pb(Zn_1/3Nb_2/3 )O₃-0.1BaTiO₃-xPbTiO₃ （0.0≤x≤0.2） phase dia-gram is established through analysis of structure and dielectric behavior associated with changes in temperature andcomposition

关 键 词：relaxor FERROELECTRICS dielectric RELAXATION rhombohedral-tetragonal phase switching micromacrodomain 

分 类 号：N[自然科学总论]