Pb(Mn1/3Nb2/3)0.07(Ni1/3Nb2/3)0.10(Zr0.5Ti0.5)0.83O3 composition ceramics with high piezoelectric properties were fabricated by the columbite precursor method for ultrasonic generators, and the effects of sintering temperature on microstructure and piezoelectric properties were systematically investigated. It was found that the tetragonality of the ceramics decreased with increase in sintering temperature. Moreover, excellent physical properties such as d33=447 pC/N, εr=1,843, kp=0.641, and Qm=1,207 were obtained for an ultrasonic generator when the second calcination temperature and sintering temperature were 720℃ and 920℃, respectively.
