Phase Development and Dielectric, Ferroelectric and Piezoelectric Properties of Pb(Mg<inf>1/3</inf>Nb<inf>2/3</inf>)<inf>0.9</inf>Ti<inf>0.1</inf>O<inf>3</inf>-Bi<inf>0.5</inf>(Na<inf>0.74</inf>K<inf>0.26</inf>)<inf>0.5</inf>TiO<inf>3</inf>Ceramics

Abstract

© 2015 Taylor & Francis Group, LLC. In this work, the relationships between phase development and the properties of a new relaxor based ferroelectric (1-x)Pb(Mg1/3Nb2/3)0.9Ti0.1O3-xBi0.5(Na0.74K0.26)0.5TiO3ceramics (when x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0 mole fraction) was studied. The pseudo-cubic structure was observed in the ceramics with x ≤ 0.7 mole fraction. The rhombohedral and tetragonal phases were found to coexist when x increased to 0.9, which transformed into the single tetragonal phase when x increased to 1.0. The dielectric constant measured at room temperature decreased with increasing x. The remnant polarization and piezoelectric constant of the ceramics significantly increased when x increased to 0.9 and 1.0.