2008 Volume 116 Issue 1352 Pages 536-539
(K0.52Na0.48)1-xLix (Nb1-xSbx)O3 lead-free ceramics were prepared by solid state reaction and the electrical properties of the ceramics were characterized. The crystalline phases and microstructure of the ceramics exhibit much dependence on the content of x, and the orthorhombic and tetragonal phases of the samples coexisted in the composition range of 0.04 ≤ x ≤ 0.05 at room temperature. The ceramics with x = 0.05 show the better die-, piezo- and ferroelectric properties: piezoelectric constant d33 = 303 pC/N, planar electromechanical coupling coefficient kp = 0.50, the relative dielectric constant K = 1228, syntonic impedance Rr = 66.1Ω, remnant polarization Pr = 31.2 μC/cm2, and coercive field Ec = 0.770 kV/mm.
Journal of the Ceramic Association, Japan
Journal of the Ceramic Association, Japan
