Fabrication and electrical properties of Eu3+:BaTiO3 nanoceramics for SOFC

Dariusz Hreniak 1,  Wiesław Stręk 1,  Jacek Chmielowiec 3,  Grzegorz Paściak 3,  Robert Pązik 1,  Stanisław Gierlotka 2,  Witold Łojkowski 2

1. Polish Academy of Sciences, Institute of Low Temperature and Structure Research (INTiBS), Okólna 2, Wrocław 50-422, Poland
2. Polish Academy of Sciences, High Pressure Research Center (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland
3. Electrotechnical Institute, Division of Electrotechnology and Materials Science (IEL), M. Skłodowskiej-Curie 55/61, Wrocław, Poland

Abstract

It is well known that perovskite-type oxides can be used both as electrolytes as electrodes or oxygen separation membranes for SOFC (Solid Oxide Fuel Cell). Recently, the dependence of the size of crystallites on the electric properties of oxide materials was found. It has been reported that mechanism of electron conductivity is governed by the grain sizes of ceramic [1].
In this work the new method of fabrication of nanoceramics by the hot-pressing under high pressure of sol-gel derived Eu3+:BaTiO3 nanocrystalline powders is reported. The preliminary studies of conductivity of fabricated nanoceramics are presented. The energy of activation from alternating current measurements was determined. The influence of size of crystallites on the conductive properties of Eu3+:BaTiO3 was investigated. The possibility of application of perovskite-type nanoceramics doped with rare-earth ions in the fuel cells systems is discussed.

[1] N. Setter, R. Waser, Acta mater. 2000, 48, 151.

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Presentation: poster at E-MRS Fall Meeting 2004, Symposium A, by Dariusz Hreniak
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-05-19 15:58
Revised:   2004-05-25 09:39
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