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Domain Switching During Electromechanical Poling in Lead Zirconate Titanate Ceramics

Jones, Jacob L. and Kounga Njiwa, Alain Brice and Aulbach, Emil and Granzow, Torsten (2008):
Domain Switching During Electromechanical Poling in Lead Zirconate Titanate Ceramics.
In: Journal of the American Ceramic Society, pp. 1586-1590, 91, (5), ISSN 0002-7820, [Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2008.02327.x],
[Article]

Abstract

In many polycrystalline piezoelectric ceramics, domain switching during the poling process leads to the development of a macroscopic polarization and piezoelectric behavior. Traditionally, poling involves the application of electric fields across two parallel electrodes. In the present work, a radial mechanical compressive stress is applied transverse to the electric field, increasing the potential for domain alignment during poling by taking advantage of ferroelasticity. Experiments demonstrate that poling of lead zirconate titanate using a combination of an electric field and a transverse mechanical compressive stress increases the d33 coefficient from 435 to 489 pC/N. Using neutron diffraction and pole figure inversion methods, the degree of non-180° domain switching is described using pole density distributions of the tetragonal c-axis (002). The degree of 002 domain alignment parallel to the electric field after the electromechanical poling process increases from 1.30 multiples of a random distribution (mrd) to >1.40 mrd at stresses exceeding 40 MPa.

Item Type: Article
Erschienen: 2008
Creators: Jones, Jacob L. and Kounga Njiwa, Alain Brice and Aulbach, Emil and Granzow, Torsten
Title: Domain Switching During Electromechanical Poling in Lead Zirconate Titanate Ceramics
Language: English
Abstract:

In many polycrystalline piezoelectric ceramics, domain switching during the poling process leads to the development of a macroscopic polarization and piezoelectric behavior. Traditionally, poling involves the application of electric fields across two parallel electrodes. In the present work, a radial mechanical compressive stress is applied transverse to the electric field, increasing the potential for domain alignment during poling by taking advantage of ferroelasticity. Experiments demonstrate that poling of lead zirconate titanate using a combination of an electric field and a transverse mechanical compressive stress increases the d33 coefficient from 435 to 489 pC/N. Using neutron diffraction and pole figure inversion methods, the degree of non-180° domain switching is described using pole density distributions of the tetragonal c-axis (002). The degree of 002 domain alignment parallel to the electric field after the electromechanical poling process increases from 1.30 multiples of a random distribution (mrd) to >1.40 mrd at stresses exceeding 40 MPa.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 91
Number: 5
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 18 May 2011 15:20
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2008.02327.x
Identification Number: doi:10.1111/j.1551-2916.2008.02327.x
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