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

作者：Dul'kin E^*; Mojaev E; Roth M; Khamman O; Tan X

来源：Applied Physics Letters, 2009, 95(25): 252903.

DOI：10.1063/1.3275730

We have carried out a combined acoustic emission (AE) and dielectric permittivity study of the xPb(Zr1/2Ti1/2)O-3-(1-x)Pb(Ni1/3Nb2/3)O-3 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.

• 出版日期2009-12-21