Abstract
AbstractPhotostrictive effect that has been discovered for over half a century is getting renewed interest in recent years in view of the great potential for the wireless remote‐control technology. Compared with lead lanthanum zirconate titanate (PLZT) ferroelectrics that have been intensively studied, Bi0.5Na0.5TiO3 (BNT) ceramics have a more environment‐friendly prospect. In this study, we present a significant photostrictive response for Bi0.5Na0.5TiO3 ceramics under visible light illumination. The ultraviolet–visible diffuse reflectance spectrum indicates that the BNT ceramic is a direct bandgap semiconductor (Eg = 2.93 eV) with a long tail absorbance till wavelength ~560 nm. Transmission electron microscopy analysis reveals nanoscale domains and fluctuated local structure in BNT ceramics. A significant photostriction ΔL/L about 0.08% was observed for BNT when irradiated by 405‐nm laser at the power of 20 kW/m2. The nonuniform shifts of the X‐ray diffraction peaks under external laser illumination indicates that the photostriction is mainly attributed to the light‐induced distortion of crystalline lattice. Such a big deformation approaching that of piezoelectrics/ferroelectrics induced by electric field shows great promise for photo‐driven multifunctional applications.
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.
