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Microstructures and Pyroelectric Properties of Multicomposition 0.9PbZrO 3 · x PbTiO 3 ·(0.1− x )Pb(Zn 1/3 Nb 2/3 )O 3 Ceramics
Author(s) -
Wu Yong Jun,
Uekawa Naofumi,
Sasaki Yoshinori,
Kakegawa Kazuyuki
Publication year - 2002
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2002.tb00392.x
Subject(s) - pyroelectricity , spark plasma sintering , materials science , microstructure , ceramic , analytical chemistry (journal) , atmospheric temperature range , sintering , mineralogy , dielectric , ferroelectricity , metallurgy , chemistry , physics , thermodynamics , optoelectronics , chromatography
The microstructures and pyroelectric properties of multicomposition 0.9PbZrO 3 · x PbTiO 3 ·(0.1− x )Pb(Zn 1/3 Nb 2/3 )O 3 (PZ–PT–PZN) ceramics were investigated. The PZ–PT–PZN ceramics with nearly theoretical density were prepared by spark plasma sintering at low temperature (800°C) for a very short time (10 min) from two original compositions with x = 0.025 and x = 0.050. The heat treatment was successfully used to control the diffusion between the different compositions in such ceramics. For ceramics heat‐treated at 900°C, two pyroelectric peaks corresponding to the original compositions were observed. When the heat‐treatment temperature was increased to 1200°C, these two pyroelectric peaks combined into one sharp pyroelectric peak, which corresponds to average composition. When the spark‐plasma‐sintered ceramics were heat‐treated at 950°C, a high and stable pyroelectric coefficient (>100 nC·cm −2 ·K −1 ) over a wide temperature range (23°–47°C) was obtained. It was found that the pyroelectric properties strongly depended on the microstructures.