Cation inter-diffusion between LaMnO3 and LaCoO3 materials

Palcut, Marian, Knibbe, Ruth, Wiik, Kjell and Grande, Tor (2011) Cation inter-diffusion between LaMnO3 and LaCoO3 materials. Solid State Ionics, 202 1: 6-13. doi:10.1016/j.ssi.2011.09.003


Author Palcut, Marian
Knibbe, Ruth
Wiik, Kjell
Grande, Tor
Title Cation inter-diffusion between LaMnO3 and LaCoO3 materials
Formatted title
Cation inter-diffusion between LaMnO3 and LaCoO3 materials
Journal name Solid State Ionics   Check publisher's open access policy
ISSN 0167-2738
1872-7689
Publication date 2011-11-02
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.ssi.2011.09.003
Open Access Status Not yet assessed
Volume 202
Issue 1
Start page 6
End page 13
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV * North-Holland
Language eng
Formatted abstract
Cation inter-diffusion between polycrystalline LaMnO3 and LaCoO3 pellets has been studied at 1373-1673 K in air by electron microprobe analysis. Inter-diffusion coefficients were evaluated by the Boltzman-Matano method from Mn3+ to Co3+ concentration profiles. The cation inter-diffusion is thermally activated and follows Arrhenius behaviour. The activation energies have been calculated and the mechanism for the B-site cation diffusion in La(Mn,Co)O3 solid solution suggested. Cation diffusion coefficients in the end members LaMnO3 and LaCoO3 were estimated. Cation mobility in LaMnO3 is higher than in LaCoO3. It is suggested that higher cation diffusion in LaMnO3 is due to the specific defect chemistry of this material, caused by the relative stability of manganese in a higher oxidation state (Mn4+). The results are compared to previous reports on cation diffusion in perovskite oxides.
Keyword Cation diffusion
Lanthanum cobaltite
Lanthanum manganite
Perovskite
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
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