Structure and enhanced piezoelectric response by chemical doping in PbTiO3–PbZrO3–Bi(Ni1/2Ti1/2)O3

The piezoelectric ceramics (1 − x − y)PbTiO3 − xPbZrO3 − yBi(Ni1/2Ti1/2)O3 exhibit greatly enhanced piezoelectric properties at morphotropic phase boundaries (MPB). X-Ray diffraction (XRD) analysis was used to investigate the MPB structure of (1 − x − y)PbTiO3 − xPbZrO3 − yBi(Ni1/2Ti1/2)O3 ceramics. The dielectric, ferroelectric, and piezoelectric properties were systematically investigated. The morphotropic phase boundaries are at x = 0.10, 0.20, 25; y = 0.46, 0.39, 0.34, respectively. An optimum high temperature piezoelectric ceramic is obtained at the composition of x = 0.20 and y = 0.39 (d33 = 510 pC/N, d⁎33(bi) = 462 pm/V, Tc = 318 °C, Ec = 20.0 kV/cm and Pr = 25.5 μC/cm2).