Synthesis, Characterization and Dielectric Properties of K<SUB>1-x</SUB>Na<SUB>x</SUB>NbO<SUB>3</SUB>

Abstract

The samples of K 1-x Na x NbO 3 (X=0.4, 0.2, 0) ceramics (PSN) have been prepared by the conventional solidstate reaction method and sintering process. The prepared samples have been characterized by XRD. All the prepared samples show orthorhombic structure at room temperature. Dielectric and Electrical properties of PSN system have been investigated in the temperature range 45 0 C-245 0 C, and at 1MHz frequency. It is observed that dielectric constant, loss tangent and electrical conductivity increases with increasing temperature. Near the transition temperature dielectric constant, loss tangent and electrical conductivity of these samples show anomalous behaviour with temperature.