Hancock, C and Slater, Peter.R. (2011) Synthesis of silicon doped SrMO3 (M=Mn, Co): stabilization of the cubic perovskite and enhancement in conductivity. Dalton Transactions, 40. pp. 5599-5603.
URL of Published Version: http://pubs.rsc.org/en/content/articlelanding/2011/dt/c1dt10253b
Identification Number/DOI: 10.1039/C1DT10253B
In this paper we report the successful incorporation of silicon into SrMO3 (M=Co, Mn) leading to a structural change from a hexagonal to a cubic perovskite. For M=Co, the cubic phase was observed for low doping levels (3%), and these doped phases showed very high conductivities ( up to ≈350 Scm-1 at room temperature). However, annealing studies at intermediate temperatures (700-800○C), indicated that the cubic phase was metastable with a gradual transformation to a hexagonal cell on annealing. Further work showed that co-doping with Fe resulted in improved stability of the cubic phase; a composition SrCo0.85Fe0.1Si0.05O3-y displayed good stability at intermediate temperatures and a high conductivity (≈150 Scm-1 at room temperature).
|Type of Work:||Article|
|Date:||14 April 2011 (Publication)|
|School/Faculty:||Colleges (2008 onwards) > College of Engineering & Physical Sciences|
|Department:||School of Chemistry|
|Keywords:||solid oxide fuel cell, cathode, silicon|
|Institution:||University of Birmingham|
|Copyright Holders:||Royal Society of Chemistry|
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