The piezoelectric properties of low-temperature sintered PNN-PZT-based ceramics and their applications

0.25Pb(Ni1/3Nb2/3)O-3-0.75Pb(Zr0.52Ti0.48)O-3 (PNN-PZT) piezoceramics, doped and undoped with BiFeO3 and Ba(Cu0.5W0.5)O-3 oxides, were prepared by conventional mixed-oxide technique, using sintering temperature at 850 degrees C similar to 950 degrees C. Microstructural and compositional analyses of these low-temperature sintered PNN-PZT-Based ceramics have been carried out using XRD and SEM. The effects of dopants on the sintering temperature and dielectric properties of the PNN-PZT ceramics have been investigated. In this paper, we successfully showed that these additives were helpful in both the lowering of the sintering temperature and the improvement of the dielectric properties. The optimum sintering condition is also found.