Dielectric properties and X-ray study of Zr-substituted Pb(Yb1/2Nb1/2)O-3 ceramics

Abstract

The dielectric behavior and the crystal structure of (1 - x)Pb(Yb1/2Nb1/2)O-3-xPbZrO(3) (PYN(1-x)PZ(x)) (0 less than or equal to x less than or equal to 0.6) solid solution have been investigated. In the PYN-rich composition range (0 less than or equal to x less than or equal to 0.3), the paraelectric (PE)-antiferroelectric (AFE) phase transition takes place sharply and is independent of the applied frequency. However, on increasing PZ concentration, the dielectric constant vs. temperature curve becomes gradually broader and the apparent transition temperature becomes frequency-dependent. For 0.33 less than or equal to x less than or equal to 0.60, the crystal structure becomes pseudocubic from the PYN's orthorhombic and a typical relaxer phase transition is clearly established.