Preparation of Lead Zirconate-Lead Nickel Niobate Ceramics by the Reaction Sintering Process

Abstract

The perovskite structure of lead zirconate -lead nickel niobate ceramics, (1-x) PbZrO 3 -xPb(Ni 1/3 Nb 2/3 )O 3 (PZ -PNN) at x between 0.00-0.50, has been prepared by the reaction-sintering process. The specimens were prepared directly from a mixture of their constituent oxide without any calcination step. The PZ -PNN ceramics could be obtained after 6 h sintering at 1,100-1,250 • C. Crystal structure and phase transition of PZ-PNN were investigated by x-ray diffraction (XRD). XRD indicated that the structure of PZ-PNN ceramics is orthorhombic for a composition where x = 0.00, rhombohedral for compositions where x = 0.10 ≤ x ≤ 0.40 and pseudo-cubic for a composition where x = 0.50. The dielectric properties of the ceramics were measured as functions of both temperature and frequency. The results indicated that the transition temperature decreases with increasing PNN concentration. Furthermore, morphology and grain size evolution have been determined via a scanning electron microscope (SEM)

Enhanced Electrical Properties of Novel Pb(Ni1/3Nb2/3)O3–BiScO3–PbTiO3Ternary System near Morphotropic Phase Boundary

“…Furthermore, an increasing number of studies of the ferroelectric and piezoelectric properties of PNN-PZ-PT have been carried out, and excellent piezoelectric properties of the PNN-PZ-PT ternary system have been observed. 24,25) However, up to now, there has been no report yet on the PNN-BS-PT of the BiScO 3 -PbTiO 3 -based piezoelectric ceramic system. For application purposes, it is expected that such complex systems can yield good piezoelectric coefficients while retaining a high Curie temperature.…”