Abstract
Relaxor ferroelectric compositions of 0.2Pb(Mg1/3Nb2/3)O3–0.5Pb(Zr0.48Ti0.52)O3–0.3Pb(Fe1/3Nb2/3)O3 (0.2PMN–0.5PZT–0.3PFN) ceramics were doped with different concentrations of Li2CO3 and were prepared by a columbite precursor process. Their structural, dielectric and pyroelectric properties were studied. A phase analysis was performed using the X-ray diffraction patterns from 2θ = 44° to 46°, over which the tetragonal phase displays two peaks, (002)T and (200)T, while the rhombohedral phase displays one peak, (200)R. A well saturated P–E hysteresis loop was obtained for the 0.2PMN–0.5PZT–0.3PFN ceramic doped with 0.2 wt.% Li2CO3, and the values for the remnant polarization (Pr) and coercive field (Ec) were 30 μC/cm2 and 5.4 kV/cm, respectively. A maximum value of the pyroelectric coefficient, 518 μC/m2K, was obtained for the 0.2PMN–0.5PZT–0.3PFN ceramic doped with 0.3 wt.% Li2CO3 at the maximum temperature (Tmax) due to the decrease of the binding energy for the polarization charge which in formed at the surface.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
