Title :
The structure and ionic conductivity of Li0.5−yNayLa0.5 {Nb,Ta}2O6 system
Author :
Kobylianska, S.D. ; V´yunov, O.I. ; Gavrilenko, O.N. ; Belous, A.G.
Author_Institution :
Vernadskii Institute of General & Inorganic Chemistry, Kyiv, Ukraine
Abstract :
We have synthesized Li0.5−yNayLa0.5 Nb2O6 and Li0.5−yNayLa0.5 Ta2O6 defect perovskite solid solutions with 0 < y ≤ 0.5. Lithium ion diffusion in the investigated system exhibits no percolation effect. In the Li0.5−yNayLa0.5 Nb2O6 system, the ionic conductivity as a function of sodium content has a maximum due to two competing factors: the increase in perovskite cell volume and the decrease in lithium ion concentration. The ionic conductivity of Li0.5−yNayLa0.5 Ta2O6 samples decreases with sodium content.
Keywords :
Conductivity; Ions; Lithium; Nuclear magnetic resonance; Solids; Temperature measurement; X-ray scattering; NMR; ionic conductivity; niobates; solid-state reactions; tantalates;
Conference_Titel :
Oxide Materials for Electronic Engineering (OMEE), 2012 IEEE International Conference on
Conference_Location :
Lviv, Ukraine
Print_ISBN :
978-1-4673-4491-3
DOI :
10.1109/OMEE.2012.6464765
