Abstract
Developing polymorphic phase coexistence near room temperature in potassium sodium niobate-based piezoceramics is a widespread way to improve strain performance. Herein, 0.97(K0.48Na0.52)1-3xLaxNbO3-0.03SrTiO3 piezoceramics were studied by analyzing their grain images, crystal structures, dielectric properties, Raman spectra, ferroelectric properties, strain responses, and piezoelectric properties. A high strain of 0.43% was achieved at x = 0.0050 presenting a diffuse phase transition state, due to various intrinsic factors, including large electrostriction, small piezoelectric effects, and extrinsic microdomain wall reorientation. The large electrostriction was the chief contribution to the strain due to the considerable electrostrictive coefficient (Q33) of 0.039 m4/C2. Furthermore, the considerable Q33 was due to B-site shifting by distorting the slightly compressed NbO6 octahedron arising from La3+ doping. The compressed of the NbO6 octahedra was proven by XRD results and generated distortion according to the obtained Raman spectra.
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.
