A STUDY ON ELECTRICAL PROPERTIES OF YTTERBIUM OXIDE DOPED Ba (Zr0.02Ti0.98)O3 CERAMICS

Ytterbium oxide (Yb 2 O 3 ) (0.02-0.06 wt.%) doped Ba (Zr 0.02 Ti 0.98 ) O 3 were synthesized by mixed oxide route.The powders were calcined at 1100 C for 4 h, de-agglomerated, granulated pressed into pellets, and sintered at 1450 C for 2 h.The samples were electrode with silver-palladium paste, cured at 1000 C for 1 h, poled and characterized.Maximum piezoelectric coefficient (d 33 ) achieved was 345 pC/N and relative dielectric constant (K=14051.2) obtained at Curie temperature (T c ) and 100 Hz frequency for 0.02 wt.% Yb 2 O 3 doping.This sample exhibits a higher positive strain of 0.46% at an electric field of 20.94 kV/cm could be a suitable lead-free piezo material for high strain and actuation application.