Effect of Sm on dielectric, ferroelectric and piezoelectric properties of BPTNZ system

Study on structural, dielectric and ferroelectric properties of Sm substituted BPTNZ system with compositional formula Ba0.80−xSmxPb0.20Zr0.10Ti0.90O3+0.5% Nb2O5 by weight, (x=0 to 0.01 in the steps of 0.0025) was done. Conventional solid state method was adopted for the synthesis of the samples. The single phase was confirmed by X-ray diffraction (XRD) analysis. Scanning electron microscopy was done for microstructural analysis. The dielectric properties were measured as a function of temperature and frequency. Ferroelectric P-E loops were recorded for all the samples at room temperature. Piezoelectric parameters such as 'd33' and electromechanical coupling coefficient 'kp' were also measured at room temperature for all the samples. The relationship between properties and structure of the prepared ceramics was established and results are discussed here.