Abstract
Lead-free K0.5Na0.5NbO3 (KNN)-based single crystals have been prepared by a seed-free, solid-state crystal growth method. The effects of the calcined temperature of ingredients on the growth, structure and electrical properties of the single crystals are systematically studied. Results show that increasing the calcined temperature is beneficial to the synthesis of pure orthorhombic-phase powder, but it hardly affects the phase structure of the single crystals. When the calcined temperature is in the range of 700–850 °C, it is more useful for obtaining larger KNN-based crystals. What is more, the width of the domains in the crystals first decreases and then increases with rising of the calcined temperature, which is in well agreement with the changing regularity of the structure and electrical properties. The single crystals with good electrical properties can be obtained in a wide calcined-temperature range of 700–850 °C: the piezoelectric constant d33 of 155–209 pC N−1, dielectric constant e of 291–389, dielectric loss tanδ of 2.0–3.4%, and remnant polarization Pr of 25.4–49.1 μC cm−2.
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 callMore From: Journal of Materials Science: Materials in Electronics
Disclaimer: 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.
