Abstract

Preparation and Piezoelectric Characterization of (K_0.5Na_0.5)NbO₃ Ceramic

Author(s): J. Venkatesh, M. Es-Souni

 In this article the preparation, microstructure, dielectric and piezoelectric properties of lead free piezoelectric ceramic (K0 .5Na0.5) Nbo3 are reported. We have followed the conventional processing route to achieve 93%-94% density with average grain size distribution of about 10 microns. A longitudinal piezoelectric coefficient (d33) of 94 pm/v 0.8 pm/v and radial coupling coefficient KP of 33% have been obtained on this compound. The measured free permittivity and loss tangents at 1 kHz are found to be 436 and 9%, respectively.