Mechanosynthesis of complex oxides with fluorite and perovskite-related structures and their sintering into nanocomposites with mixed ionic–electronic conductivity

In this paper we show that mechanochemical approach allows fast synthesis of individual phases with fluorite and perovskite structures and preparation of dual-phase nanocomposites with mixed ionic–electronic conductivity. Binary oxides obtained by mechanosynthesis are frequently metastable compounds...

Full description

Saved in:
Bibliographic Details
Published in:Solid state ionics 2005-11, Vol.176 (37), p.2813-2818
Main Authors: Zyryanov, V.V., Sadykov, V.A., Uvarov, N.F., Alikina, G.M., Lukashevich, A.I., Neophytides, S., Criado, J.M.
Format: Article
Language:English
Subjects:
Dual-phase nanocomposites
Mechanosynthesis
Mixed conductors
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper we show that mechanochemical approach allows fast synthesis of individual phases with fluorite and perovskite structures and preparation of dual-phase nanocomposites with mixed ionic–electronic conductivity. Binary oxides obtained by mechanosynthesis are frequently metastable compounds which decompose at moderate temperatures before sintering into the dense ceramics. Complex doping provides kinetic stabilization of perovskites and fluorites and allows their sintering into dense ceramics. Moreover, complex doping of structurally different phases makes possible a preparation of compatible compounds for nanocomposites. In all 10 nanocomposites considered here, the chemical interaction (interdiffusion) was found to occur in some degree. Rules are formulated for preparation of composites from compatible compounds. All perovskites and ceria-based composites are likely to be more promising as membrane materials.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2005.08.011