| A B-site oxide precursor processing for synthesizing lead nickel niobate-lead zirconate titanate (0.2Pb(Ni1/3Nb2/3)O3-0.8Pb(Zr,Ti)O)3, PNN-PZT) solid solutions is invited. The calcination temperature of the B-site oxide Precursor is optimized. The effect of the sintering temperature and the Zr/Ti ratio on the properties of piezoelectric, dielectric and electromechanical properties were investigated. TG, DTA and XRD analysis were used to study the calcination temperature of the B-site oxide precursor, and the result shows a single phase component when calcined at 1355℃. Then, pure perovskite ceramics were obtained by mixing with PbO and without the formation of pyrochlore phase. The effect of the sintering temperature and the Zr/Ti ratio on the piezoelectric, dielectric and electromechanical properties of the PNN-PZT ceramics were investigated through performances comparison. And the relationship between structure and perporties were discussed based on XRD and SEM analysis. when the B-site oxide precursor was calcined at 1355℃, the PNN-PZT ceramics sintered at 1220℃with Zr/Ti equals to 50/50 exhibited excellent properties.Furthermore, the phase structure and properties of 0.5Pb(Ni1/3Nb2/3)O3-0.5Pb(ZrxTi(1-x))O3 and the Zr/Ti close to the morphotropic phase boundary(MPB) were investigated. As a result, it supposed that the ceramic's rhombohedral phase transit into tetragonal gradually with the increase of Titania component; The piezoelectric constant and curie temperature increased remarkably with the decrease of Zr/Ti ratio. It is ascribed to the high content of PT(PbTiO3) in the low Zr/Ti ratio samples, which was tetragonal phase and has a higher curie temperature(490℃).
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