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Cation distribution in spinel (Mn,Co,Cr)3O4at room temperature

Purwanto, A. and Fajar, A. and Mugirahardjo, H. and Fergus, J. W. and Wang, K. (2010) Cation distribution in spinel (Mn,Co,Cr)3O4at room temperature. Journal of Applied Crystallography, 43 (3). pp. 394-400. ISSN 0021-8898

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Abstract

As part of a study of the long-term operation of solid-oxide fuel cells, three (Mn,Co,Cr)3O4 samples have been synthesized and characterized. X-ray and neutron diffraction patterns from the powder samples at room temperature were measured and the data were co-refined. The neutron data were indispensible in locating Mn, Co and Cr within the crystallographic unit cell with their respective atomic occupancies. Two of these samples have been identified as cubic Mn0.76Co0.58Cr1.66O4 and Mn1.28Co1.72O4. The third is a two-phase sample containing cubic Mn1.66Co1.34O4 and tetragonal Mn2.05Co0.91O4 in a 59.1 (6):40.9 (6)% mass fraction ratio. Cr, which might be introduced from reaction with chromia during oxidation of interconnect materials, exhibits a preference for the octahedral site rather than the tetrahedral site. Without Cr, Mn dominates the octahedral site.

Item Type: Article
Subjects: Daur Bahan Bakar Nuklir dan Bahan Maju > Bahan Struktur dan Bahan Maju > Teknik Sintesis Bahan Maju
Divisions: Pusat Sains dan Teknologi Bahan Maju
Depositing User: EDITOR PSTBM BATAN
Date Deposited: 01 Dec 2018 11:54
Last Modified: 01 Dec 2018 11:54
URI: http://repo-nkm.batan.go.id/id/eprint/7246

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