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

Abstract

We have carried out a combined acoustic emission(AE) and dielectricpermittivity study of the xPb(Zr1/ 2Ti1/2)O3-(1−x)Pb(Ni1/3Nb2/3)O3relaxor 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 dielectricpermittivity, in agreement with a model proposed for a thermally cycled small elastic dipole.

TEM Observations on 0.65Pb(Zr0.42Ti0.58)O3‐0.35Pb(Ni0.33Nb0.67)O3 Ceramics with CuO Additive

“…S OLID solutions between a ferroelectric Pb(Zr 1Àx Ti x )O 3 (PZT) and a relaxor ferroelectric Pb(Ni 1/3 Nb 2/3 )O 3 (PNN), namely PZT-PNN ceramics, have attracted special attention due to their richness in phase transitions within a narrow temperature range, from room temperature to 300°C. [1][2][3] PZT-PNN ceramics have been investigated for the possible application to piezoelectric multilayer actuators due to their high piezoelectric properties. 4,5 The piezoelectric constant, d 33 , increased as the amount of PNN increased, but the T c decreased under the same conditions.…”

Effect of MnO2 doping on piezoelectric, dielectric and ferroelectric properties of PNN–PZT ceramics

“…Leadbased relaxor ferroelectrics have a general formula of Pb(B 0 B″)O 3 (where B 0 represents Mg 2 þ , Ni 2 þ , Zn 2 þ , Fe 3 þ , Sc 3 þ , In 3 þ , Mn 4 þ , or Sn 4 þ ; and B″ represents Nb 5 þ , Ta 5 þ , Sb 5 þ , or W 6 þ ) [8,9]. Relaxor ferroelectrics Pb(Ni 1/3 Nb 2/3 )O 3 -Pb(Zr,Ti)O 3 (abbreviated as PNN-PZT) have attracted much attention due to their excellent piezoelectric properties since Luff et al reported 0.5Pb (Ni 1/3 Nb 2/3 )O 3 À 0.35PbZrO 3 À 0.15PbTiO 3 ternary system in 1974 [10][11][12][13][14]. Dul'kin et al [11] carried out a combined acoustic emission and dielectric permittivity study of the xPZTÀ (1À x) PNN relaxor ferroelectric ceramics with compositions x¼ 0.7-0.9 corresponding to its morphotropic phase boundary.…”

“…Relaxor ferroelectrics Pb(Ni 1/3 Nb 2/3 )O 3 -Pb(Zr,Ti)O 3 (abbreviated as PNN-PZT) have attracted much attention due to their excellent piezoelectric properties since Luff et al reported 0.5Pb (Ni 1/3 Nb 2/3 )O 3 À 0.35PbZrO 3 À 0.15PbTiO 3 ternary system in 1974 [10][11][12][13][14]. Dul'kin et al [11] carried out a combined acoustic emission and dielectric permittivity study of the xPZTÀ (1À x) PNN relaxor ferroelectric ceramics with compositions x¼ 0.7-0.9 corresponding to its morphotropic phase boundary. Du et al [12] reported Fe 2 O 3 doped PNNÀ PZT ceramics with d 33 ¼ 956 pC/N and k p ¼ 0.74.…”