High temperature phases in the 0.98PbZrO3–0.02Pb(Ni1/3Nb2/3)O3 ceramic

Date
2009-01-13
Authors
Qu, W.
Tan, Xiaoli
Vittayakorn, N.
Wirunchit, S.
Besser, Matthew
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Abstract

The phase evolution with temperature in the 0.98PbZrO3–0.02Pb(Ni1/3Nb2/3)O3ceramic was investigated with dielectricpermittivity and polarization measurements, hot stage transmission electron microscopy, and high temperature x-ray diffraction. Below 190 °C, the ceramic is in the antiferroelectric phase with characteristic 14{110}csuperlatticediffractions. In this stage, typical antiferroelectric 180° domains were observed. Between 190 and 220 °C, an intermediate phase, which is characterized by 12{110}c-type superlatticediffractions, was detected. Evidences are found to suggest that this intermediate phase is ferroelectric. The 12{110}c-type superlatticediffraction persists even into the paraelectric phase above 220 °C. In addition, there exists an incommensurate phase between the low temperature antiferroelectric phase and the intermediate ferroelectric phase.

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The following article appeared in Journal of Applied Physics 105 (2009): 014106 and may be found at http://dx.doi.org/10.1063/1.3065087.

Keywords
Ames Laboratory, Ceramics, Superlattices, X-ray diffraction, Dielectrics, Permittivity, Transmission electron microscopy, Ferroelectric phase transitions, Polarization, Electrical hysteresis, Phase transitions
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