Synthesis of Lead Nickel Niobate–Lead Zirconate Titanate Solid Solutions by a B-site Precursor Method |
| |
Authors: | Gilles Robert Marlyse Demartin Maeder Dragan Damjanovic Nava Setter |
| |
Affiliation: | Ceramics Laboratory, Materials Department, Swiss Federal Institute of Technology—EPFL, 1015 Lausanne, Switzerland |
| |
Abstract: | A modified processing method for lead nickel niobate–lead zirconate titanate (Pb(Ni1/3Nb2/3)O3–Pb(Zr,Ti)O3, PNN–PZT) solid solutions is presented. This method is based on the high-temperature synthesis of a precursor that contains all the B-site cations (Ti, Zr, Ni, and Nb). This synthesis yields a diphasic mixture that contains a ZrTiO4-like phase and a rutile-like phase. Both phases exhibit a cationic valence of 4; thus, it is concluded that the mixing of Ni and Nb cations is adequate for the preparation of PNN–PZT solid solutions. Indeed, a pure perovskite phase has been obtained after calcination with lead oxide for compositions that contain 40 and 50 mol% PNN. Moreover, their electromechanical properties have been shown to be superior to values reported for standard columbite routes. This conclusion has been interpreted in terms of enhanced chemical homogeneity. |
| |
Keywords: | lead zirconate titanate nickel/nickel compounds niobium/niobium compounds |
|
|