Abstract
Fast Li+ ionic conductor Lithium Lanthanum Titanate (La0.55Li0.35TiO3) is synthesized by the tartaric acid assisted sol-gel synthesis and powder compacts are sintered. The electrical properties of the obtained ceramics are studied at frequencies up to 10 GHz and at temperatures up to 1280 K. The obtained results allow accurate determination of the specific conductivity of ceramic grains, which are found to reach 30 S/m in the region of high temperatures. A strong deviation from the Arrhenius law is observed with continuously decreasing activation energy of conductivity at temperatures T > 400 K, and a metal-like temperature dependent ionic conductivity (which may be also defined by positive temperature coefficient of resistivity - TCR) is observed at T > 1100 K. The phenomenon of this positive TCR may be related to the alteration of the occupancy of A positions by La3+ in La-enriched and La-depleted planes of crystal lattice of LLTO and to the alteration of the conditions for concerted migration of Li+ ions.
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.
