TITLE

Acoustic emission and dielectric studies of phase transitions within the morphotropic phase boundary of xPb(Zr1/2Ti1/2)O3-(1-x)Pb(Ni1/3Nb2/3)O3 relaxor ferroelectrics

AUTHOR(S)
Dul'kin, E.; Mojaev, E.; Roth, M.; Khamman, O.; Tan, X.
PUB. DATE
December 2009
SOURCE
Applied Physics Letters;12/21/2009, Vol. 95 Issue 25, p252903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have carried out a combined acoustic emission (AE) and dielectric permittivity study of the xPb(Zr1/2Ti1/2)O3-(1-x)Pb(Ni1/3Nb2/3)O3 relaxor ferroelectric ceramics with compositions x=0.7–0.9 corresponding to its morphotropic phase boundary. Temperatures of all phase transitions occurring on heating are identified accurately by AE, and a direct transition between the low-temperature (rhombohedral) and high-temperature (pseudocubic) relaxor phases is found. The AE peak intensity is generally proportional to the temperature derivative of the dielectric permittivity, in agreement with a model proposed for a thermally cycled small elastic dipole.
ACCESSION #
47132854

 

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