%0 Journal Article %T Effect Of Sr-substitution On Structural, Dielectric And Impedance Characteristics Of MPB-PZT %J Advanced Materials Letters %I International Association of Advanced Materials %Z 0976-3961 %A Tirupathi, Patri %A Tejomurthula, Anil %A Kumar, Nawnit %A Pastor, Mukul %A N. P. Choudhary, R. %D 2016 %\ 11/01/2016 %V 7 %N 11 %P 918-925 %! Effect Of Sr-substitution On Structural, Dielectric And Impedance Characteristics Of MPB-PZT %K Polycrystalline %K dielectric permittivity %K rietveld refinement technique %R 10.5185/amlett.2016.6233 %X The polycrystalline sample of Sr-modified Pb(Zr0.5Ti0.5)O3 (i.e. Pb1-xSrx(Zr0.5Ti0.5)O3 (x = 0.05-0.15)) ceramics were synthesized (close to morph-tropic phase boundary) by a cost effective (solid state reaction) method. Detailed investigation of structural phase transition was carried out using room temperature X-ray diffraction data adopting Rietveld refinement technique. The coexistence of two crystal phases (i.e., tetragonal (P4mm) and rhombohedral (R3c) for x = 0.05, and single tetragonal (P4mm) phase for x = 0.1, 0.15) were observed. Elemental analysis, grain shape and size distribution were studied using scanning electron microscope. The decrease in grain size on increasing Sr 2+ concentration was also observed. Detailed analysis of temperature and frequency dependence of dielectric exhibits the increase in dielectric permittivity as function of Sr 2+ concentration at room temperature. Beside this, the greatly reduced Curie (TC) temperature and broadening of dielectric maxima as function of increasing Sr 2+ concentration in PZT was observed. The multiple relaxation processes associated with grain, grain boundaries and interfacial polarization was noted for x=0.05 and x=0.10 to analyze the Nyquist plots. The dominant of grain boundary resistance with increasing in dopent concentration x=0.15 was observed. %U https://aml.iaamonline.org/article_14780_33c7e2c485d899c4ad3cacafd1d4be97.pdf