High temperature phases in the 0.98PbZrO(3)-0.02Pb(Ni1/3Nb2/3)O-3 ceramic

作者：Qu W^*; Tan X; Vittayakorn N; Wirunchit S; Besser M F

来源：Journal of Applied Physics, 2009, 105(1): 014106.

DOI：10.1063/1.3065087

The phase evolution with temperature in the 0.98PbZrO(3)-0.02Pb(Ni1/3Nb2/3)O-3 ceramic was investigated with dielectric permittivity and polarization measurements, hot stage transmission electron microscopy, and high temperature x-ray diffraction. Below 190 degrees C, the ceramic is in the antiferroelectric phase with characteristic 1/4{110}(c) superlattice diffractions. In this stage, typical antiferroelectric 180 degrees domains were observed. Between 190 and 220 degrees C, an intermediate phase, which is characterized by 1/2{110}(c)-type superlattice diffractions, was detected. Evidences are found to suggest that this intermediate phase is ferroelectric. The 1/2{110}(c)-type superlattice diffraction persists even into the paraelectric phase above 220 degrees C. In addition, there exists an incommensurate phase between the low temperature antiferroelectric phase and the intermediate ferroelectric phase.

• 出版日期2009-1-1