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Intrinsic and Extrinsic Size Effects in Fine‐Grained Morphotropic‐Phase‐Boundary Lead Zirconate Titanate Ceramics
Author(s) -
Randall Clive A.,
Kim Namchul,
Kucera JohnPaul,
Cao Wenwu,
Shrout Thomas R.
Publication year - 1998
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.1151-2916.1998.tb02389.x
Subject(s) - lead zirconate titanate , materials science , grain size , poling , lead titanate , ceramic , ferroelectric ceramics , phase boundary , crystallite , microstructure , transmission electron microscopy , ferroelectricity , composite material , grain boundary , domain wall (magnetism) , condensed matter physics , phase (matter) , mineralogy , dielectric , nanotechnology , metallurgy , optoelectronics , chemistry , physics , magnetic field , organic chemistry , magnetization , quantum mechanics
The processing, electromechanical properties, and microstructure of lead zirconate titanate (PZT) ceramics over the grain‐size range of 0.1‐10 μm were studied. Using measurements over a large temperature range (15‐600 K), the relative role of extrinsic contribution (i.e., domain‐wall motion) was deduced to be influenced strongly by the grain size, particularly for donor‐doped PZT. Analytical transmission electron microscopy studies were conducted to investigate the trend in domain configurations with the reduction of grain size. The correlations between domain density, domain variants, domain configurations (before and after poling), spontaneous deformation, and the elastodielectric properties were qualitatively discussed, leading to new insights into the intrinsic and extrinsic effects and relevant size effects in ferroelectric polycrystalline materials.