Structure, dielectric, and piezoelectric properties of KNaNbO-based lead-free ceramics.

Lead-free ceramics based on the (1 - )KNaNbO-Bi(ZnTi)O (KNN-BZT) system obtained the conventional solid-state processing technique were characterized for their crystal structure, microstructure, and electrical properties. Rietveld analysis of X-ray diffraction data confirmed the formation of a stable perovskite phase for Bi(ZnTi)O substitutions up to 30 mol%. The crystal structure was found to transform from orthorhombic 2 to cubic 3̄ through mixed rhombohedral and tetragonal phases with the increase in Bi(ZnTi)O content.