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Lead-free piezoelectric ceramics : Alternatives for PZT?
Journal of electroceramics, 2007-09, Vol.19 (1), p.111-124
[Peer Reviewed Journal]
2007 INIST-CNRS ;ISSN: 1385-3449 ;EISSN: 1573-8663 ;DOI: 10.1007/s10832-007-9047-0 ;CODEN: JOELFJ
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Title:
Lead-free piezoelectric ceramics : Alternatives for PZT?
Author:
SHROUT, Thomas R
;
ZHANG, Shujun J
Subjects:
Applied sciences
;
Building materials. Ceramics. Glasses
;
Ceramic industries
;
Chemical industry and chemicals
;
Domain walls
;
Electrotechnical and electronic ceramics
;
Exact sciences and technology
;
Ferroelectric materials
;
Ferroelectricity
;
Lead free
;
Lead zirconate titanates
;
Phase boundaries
;
Phase transitions
;
Piezoelectric ceramics
;
Piezoelectricity
;
Technical ceramics
;
Thermal cycling
Is Part Of:
Journal of electroceramics, 2007-09, Vol.19 (1), p.111-124
Description:
Issue Title: Special Issue on Advances in Piezoelectrics: Fundamentals, Characterization, Materials and Applications, Guest Editor: Dragan Damjanovic Investigations in the development of lead-free piezoelectric ceramics have recently claimed comparable properties to the lead-based ferroelectric perovskites, represented by Pb(Zr,Ti)O^sub 3^, or PZT. In this work, the scientific and technical impact of these materials is contrasted with the various families of "soft" and "hard" PZTs. On the scientific front, the intrinsic nature of the dielectric and piezoelectric properties are presented in relation to their respective Curie temperatures (T ^sub C^) and the existence of a morphotropic phase boundary (MPB). Analogous to PZT, enhanced properties are noted for MPB compositions in the (Na,Bi)TiO^sub 3^-BaTiO^sub 3^ and ternary system with (K,Bi)TiO^sub 3^, but offer properties significantly lower. The consequences of a ferroelectric to antiferroelectric transition well below T ^sub C^ further limits their usefulness. Though comparable with respect to T ^sub C^, the high levels of piezoelectricity reported in the (K,Na)NbO^sub 3^ family are the result of enhanced polarizability associated with the orthorhombic-tetragonal polymorphic phase transition being compositionally shifted downward. As expected, the properties are strongly temperature dependent, while degradation occurs through the thermal cycling between the two distinct ferroelectric domain states. Extrinsic contributions arising from domains and domain wall mobility were determined using high field strain and polarization measurements. The concept of "soft" and "hard" lead-free piezoelectrics were discussed in relation to donor and acceptor modified PZTs, respectively. Technologically, the lead-free materials are discussed in relation to general applications, including sensors, actuators and ultrasound transducers.[PUBLICATION ABSTRACT]
Publisher:
Heidelberg: Springer
Language:
English
Identifier:
ISSN: 1385-3449
EISSN: 1573-8663
DOI: 10.1007/s10832-007-9047-0
CODEN: JOELFJ
Source:
Alma/SFX Local Collection
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