Sidorov N., Palatnikov M., Teplyakova N., Obryadina E., Aleshina L., Feklistova E. Investigation of the Li0.03Na0.97TaуNb1-уO3 Solid Solution Structure and Properties by X-ray Analysis and Raman Spectroscopy // Journal on Selected Topics in Nano Electronics and Computing. 2013. Vol. 1. № 1. P. 51—56, DOI: 10.15393/j8.art.2013.3004


Issue № 1

Nanoelectronics and related issues of nanotechnology

Investigation of the Li0.03Na0.97TaуNb1-уO3 Solid Solution Structure and Properties by X-ray Analysis and Raman Spectroscopy

Sidorov
   N. V.		I. V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, sidorov@chemy.kolasc.net.ru
Palatnikov
   M. N.		I. V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, sidorov@chemy.kolasc.net.ru
Teplyakova
   N. A.		I. V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, sidorov@chemy.kolasc.net.ru
Obryadina
   E. Yu.		I. V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, sidorov@chemy.kolasc.net.ru
Aleshina
   L. A.		Petrozavodsk State University, aleshina@psu.karelia.ru
Feklistova
   E. P.		Petrozavodsk State University, aleshina@psu.karelia.ru
Key words:
ferroelectricity
solid solutions
perovskite structure
X-ray analysis
Raman spectroscopy
structure study		 Summary: The structure of ceramic Li0.03Na0.97TaуNb1-уO3 solid solutions and its disorder when changing composition and temperature were investigated by full-profile X-ray analysis and Raman spectroscopy. It was found that at room temperature the structure of the Li0.03Na0.97Ta0.05Nb0.95O3 solid solution is close to that of the NaNbO3 and it corresponds to the P21ma space group with four formula units per unit cell. It was shown that the oxygen octahedra in LiхNa1-хTa0.1Nb0.9O3 (х = 0, 0.15, 0.03, 0.04, 0.05) solid solutions are slightly distorted and their geometry is identical to that one of the oxygen octahedra in the NaNbO3 structure. By the dependence of the intensity on temperature of the lines in the Li0.03Na0.97Ta0.4Nb0.6O3 solid solution spectrum, corresponding to the Li+ and Na+ vibrations in the cuboctahedral cavities of the structure at T > 322 оС, strong disorder in the alkali metal sublattice was found. This may indicate a significant abrupt increase of the lithium cations mobility and, therefore, changes of the kinetic and energetic characteristics of the processes of charge ionic transport

© Petrozavodsk State University
Is passed for the press: 13 december 2013 year