Health & Environmental Research Online (HERO)


Print Feedback Export to File
6939721 
Journal Article 
Relaxor ferroelectric properties of PZT-PZN-PMnN Ceramics 
Le Dai Vuong; Phan Dinh Gio; Nguyen Truong Tho; Truong Van Chuong; , 
2013 
Yes 
Indian Journal of Engineering and Materials Sciences
ISSN: 0971-4588 
NATL INST SCIENCE COMMUNICATION-NISCAIR 
NEW DELHI 
555-560 
WOS:000332438000014 
xPb(Zr0.47Ti0.53)O-3-(0.925-x)Pb(Zn1/3Nb2/3)O-3-0.075Pb(Mn1/3Nb2/3)O-3+0.7%wt Li2CO3 (PZT-PZN-PMnN) ceramics with x=0.65-0.9 have been prepared by two-stage calcination method. The effect of the PZT content on the relaxor behavior and ferroelectric properties of ceramics has been investigated. The degree of diffuseness (gamma) from 1.72 to 1.85 indicates that all of compositions show a diffused phase transition with the strong frequency dispersion, which is characteristic of relaxor ferroelectric materials. The sharpness of the permittivity peak shows that the compositions are gradually approached normal ferroelectric behavior when the mol fraction of PZT increases. At x = 0.80, dielectric and ferroelectric properties of ceramics are optimal with the mass density (rho) of 7.81 g/cm3, the dielectric constant (epsilon r) of 1230, the dielectric loss (tan delta) of 0.005 and the remanent polarization (Pr) of 27 mu C/cm2.