Structure, microstructure and ionic conductivity of the solid solution LiTi2−xSnx(PO4)3

Autor:	Farida Bouremmad, Jean-Claude Carru, Abderrahim Benabbas, Nedjemeddine Bounar, Patrick Ropa
Rok vydání:	2012
Předmět:	Lattice constant Materials science Rietveld refinement X-ray crystallography Fast ion conductor Analytical chemistry Ionic conductivity Crystal structure Electrical and Electronic Engineering Condensed Matter Physics Powder diffraction Electronic Optical and Magnetic Materials Solid solution
Zdroj:	Physica B: Condensed Matter. 407:403-407
ISSN:	0921-4526
DOI:	10.1016/j.physb.2011.11.006
Popis:	The Nasicon compounds with the composition LiTi 2− x Sn x (PO 4 ) 3 ( x =0–1.8) were synthesised by the solid state reaction. Their structures were determined from X-ray powder diffraction using Rietveld analysis. All the compositions present the space group R-3c. The refinements show that the Ti and Sn cations are statistically distributed over the same position while the Li ones are exclusively located on the M1 site. The lattice constants a and c exhibit linear variation over the whole composition range. The bond lengths are in accordance with those of other Nasicon structures. The SEM micrographs of the samples show relative porous microstructures. The ionic conductivity is about 10 −4 –10 −5 S cm −1 ; for the activation energy, a typical value of 0.32 eV is obtained for x =0.6 composition whereas significant deviation from linearity in the temperature dependence of the dc conductivity, is observed for the Sn-rich ones. This tendency is discussed along with the structural features.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::882395dfabfdf81503f1d51b0d4f7371 https://doi.org/10.1016/j.physb.2011.11.006 Zobrazit plný text záznamu Full Text from ScienceDirect