TITLE:
Structure and Electrical Properties of Fe2O3-Doped PZT-PZN-PMnN Ceramics
AUTHORS:
Le Dai Vuong, Phan Dinh Gio
KEYWORDS:
Crystal Structure, Dielectrics, Piezoelectrics, Electromechanical Coupling Factor, Fe2O3 Doping
JOURNAL NAME:
Journal of Modern Physics,
Vol.5 No.14,
August
22,
2014
ABSTRACT: The 0.8Pb(Zr0.48Ti0.52)O3 – 0.125Pb(Zn1/3Nb2/3)O3 – 0.075Pb(Mn1/3Nb2/3)O3 + x wt% Fe2O3 ceramics (PZT-PZN-PMnN), where x = 0 ÷0.35, has been prepared by
two-stage calcination method. The effect of Fe2O3 content
on the crystal structure and electrical properties of ceramics has been
investigated. The results of X-ray diffraction (XRD) show that all samples have
pure perovskite phase with tetragonal structure, the c/a ratio increases with increasing Fe2O3 content. At x = 0.25, electrical properties of ceramics are best: the
density (r) of 7.86 g/cm3, the
electromechanical coupling factor (kp)
of 0.64, the dielectric constant (εr)
of 1400, the dielectric loss (tand) of 0.003, the mechanical quality
factor (Qm) of 1450, the
piezoelectric constant (d31)
of 155 pC/N, and the remanent polarization (Pr)
of 37 μC/cm2, which makes it as a promising material for high power
piezoelectric devices.