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 μ 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 (εRT = 2347, εTc = 23449) while Tc constantly decreased. The remanent (Pr = 34.72 μ C/cm2) and spontaneous polarization (Ps = 41.84 μ 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.
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