Ferro-/pyroelectric response of 0.57BF-0.31PMN-0.12PT ternary ceramic far away from morphotropic phase boundaries. Issue 18 (15th December 2017)

• Record Type: Journal Article
• Authors: Joseph, Abhilash J.; Goel, Sahil; Hussain, Abid; Kumar, Binay
• Is Part Of: Ceramics international. Volume 43:Issue 18(2017)
• Page Start: 16676
• Page End: 16683
• Publication Date: 2017-12-15
• Subjects: A. Powders: solid state reaction -- B. Electron microscopy -- C. Dielectric properties -- C. Ferroelectric properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.09.058
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A ternary BiFeO3 -Pb(Mg1/3 Nb2/3 )O3 -PbTiO3 (BF-PMN-PT) solid solution with a composition far away from morphotropic phase boundaries (MPB) has been synthesized by solid-state reaction method. XRD analysis revealed a pure perovskite phase without any trace of pyrochlore phase. The system exhibited a broad phase transition with transition temperature Tc ~ 285 °C. The hysteresis loop of the ceramics displayed high remanent polarization (Pr ~ 41.23 μC/cm 2 ) and coercive field (Ec ~ 35.41 kV/cm). The true-remanent polarization after removing the non-remanent components was evaluated by remanent hysteresis and PUND tasks, which revealed the actual usable polarization component for memory devices. Time-dependent compensated plots confirmed the resistive-leakage free characteristic of the BF-PMN-PT ceramics which makes them useful for application in devices like actuators where the electric field is switched at different rates. Fatigue test showed the ferroelectric parameters (switching and non-switching polarization values) do not vary over 10 7 cycles which is important especially in electromechanical transducers and memory devices. A large piezoelectric charge coefficient (d33 ~ 115 pC/N) was observed for the investigated ceramics.