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Domain Switching During Electromechanical Poling in Lead Zirconate Titanate Ceramics
Author(s) -
Jones Jacob L.,
Kounga Alain B.,
Aulbach Emil,
Granzow Torsten
Publication year - 2008
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.1551-2916.2008.02327.x
Subject(s) - poling , lead zirconate titanate , piezoelectricity , materials science , electric field , lead titanate , ferroelectric ceramics , ceramic , piezoelectric coefficient , polarization (electrochemistry) , ferroelectricity , tetragonal crystal system , composite material , optoelectronics , dielectric , physics , crystallography , crystal structure , chemistry , quantum mechanics
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 d 33 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.