Structural and electrical properties of nanocrystalline PLZT ceramics synthesized via mechanochemical processing

Nanocrystalline powders of La-modified lead zirconate titanate (PLZT: 7/60/40) solid solution have been synthesized via mechanochemical processing. No excess PbO was used in the starting composition. Scanning and transmission electron microscopy revealed the formation of powders on the nano-scale. S...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2006-05, Vol.39 (10), p.2259-2263
Main Authors: James, A R, Subrahmanyam, J, Yadav, K L
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Domain structure
hysteresis
Exact sciences and technology
Ferroelectricity and antiferroelectricity
Physics
Piezoelectricity and electromechanical effects
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Summary:Nanocrystalline powders of La-modified lead zirconate titanate (PLZT: 7/60/40) solid solution have been synthesized via mechanochemical processing. No excess PbO was used in the starting composition. Scanning and transmission electron microscopy revealed the formation of powders on the nano-scale. Sintering the powders resulted in dense compacts, at reduced sintering temperatures. Well-saturated ferroelectric hysteresis loops with a Pr on the order of ~48 muC cm-2 and coercive fields of ~7 kV cm-1 were recorded on the samples. Strain levels up to > 0.25% with limited hysteresis ( < 0.05% in the low field region) indicate the tremendous potential of these ceramics for high-performance actuators, especially in cases where a high degree of positioning accuracy is required.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/39/10/039