Abstract

Ba modified (Pb,La,Ag)(Zr,Ti)O3 ceramics synthesized by conventional mixed-oxide method with chemical formula [Pb0.983 - zLa0.012Ag0.005Baz] [(Zr0.52Ti0.48)0.99825]O3 were investigated for ferroelectric and piezoelectric properties. XRD studies indicate that increment of Ba concentration resulted in strong tetragonality in the ceramics. Grain growth (3.08 m) inhibited and apparent density (7.54 gm/cm3) enhanced up to 1.5 mole% Ba respectively. As Ba content increased dielectric properties showed maximum values (RT = 2347, Tc = 23449) while Tc constantly decreased. The remanent (Pr = 34.72 C/cm2) and spontaneous polarization (Ps = 41.84 C/cm2) were optimum in 1 mole% Ba respectively while Ec showed increasing trend throughout the series. Piezoelectric properties attained maximum values of d33 = 438 pC/N in 1.5 mole% Ba while kp = 0.533 and kt = 0.412 in 1 mole% Ba doped (Pb,La,Ag)(Zr,Ti)O3 ceramics respectively.