Effect of doping ions on structure and electrical properties of lead-free KNN ceramics

Authors

Na Yin, Shandong University
A Jalalian, University of Wollongong
Zhigang Gai, Shandong University, University of Wollongong
Lanling Zhao, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow

RIS ID

96320

Publication Details

Yin, N., Jalalian, A., Gai, Z., Zhao, L. & Wang, X. (2014). Effect of doping ions on structure and electrical properties of lead-free KNN ceramics. Advanced Materials Research, 1058 190-195.

Abstract

Doping effect on the lattice parameters, vibration modes, dielectric and piezoelectric properties of LiSbO₃, LiTaO₃ and LiNbO₃ substituted lead-free K_0.5Na_0.5NbO₃ (KNN) ceramics are investigated. All compositions are crystallized in morphotropic phase boundary region. Enhanced piezoelectric and electromechanical response d₃₃ = approx.176-197 pC/N, k_p = approx. 45%-48%, and k_t = approx. 34%-47% obtained in the doped ceramics are due to the presence of the polymorphic phase transition between orthorhombic and tetragonal phase at room temperature.