Abstract
Rare earth (RE) elements (Pr, Sm) doped K0.5Na0.5NbO3 (KNN) lead-free ceramics were fabricated using conventional solid-state reaction method and their properties were investigated. The X-ray methods indicate that Pr and Sm ions diffuse into the KNN lattice to form new homogenous solid solutions. After the doping of RE elements, the grain size decreases obviously and the phase structure translates from orthorhombic to pseudo cubic phase. The RE ions enter into the A-site of the KNN lattice to create new A-site vacancies, exhibiting “soft” characteristics. Existence of two semicircular arcs represents both grain and grain boundary property of the materials. The results of Ea indicate that oxygen vacancies dominate the conductivity properties of the ceramics from 425 to 525 °C The photoluminescence spectra of KNN + Pr exhibits orange emissions. Both the KNN + Sm and KNN + Pr/Sm ceramics exhibit yellowish green emission upon 406 nm light excitation. RE elements Pr and Sm-doped KNN ceramics may take an important role in many fields as multifunctional materials.
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.
