Temperature dependence of the cation distribution in ZnFe{sub 2}O{sub 4} measured with high temperature neutron diffraction

Journal Article · Mon Sep 15 04:00:00 EDT 2008 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2008.05.028· OSTI ID:21128456

Hauback, B C ^[1]; Hansen, K K ^[2]

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1. Physics Department, Institute for Energy Technology, NO-2027 Kjeller (Norway)
2. Fuel Cells and Solid State Chemistry Department, National Laboratory for Sustainable Energy, Frederiksborgvej 399, 4000 Roskilde (Denmark)

ZnFe{sub 2}O{sub 4} has a spinel-type structure with Zn{sup 2+} ions located mainly on tetrahedral sites and Fe{sup 3+} ions located on octahedral sites. ZnFe{sub 2}O{sub 4} was synthesized in air by a solid state reaction and characterized with X-ray diffraction, high temperature neutron diffraction, resistivity measurements and dilatometry. The distribution of cations in ZnFe{sub 2}O{sub 4} was measured from 298 to 1243 K and results show that above 673 K the cations start to redistributed in the structure. ZnFe{sub 2}O{sub 4} has a semi-conducting behavior at room temperature, but at temperatures above 905 K the conductivity decreases as the result of an Fe-Fe interaction between octahedral sites. - High temperature in situ neutron powder diffraction, dilatometry and resistivity measurements was performed on the spinel-type oxide ZnFe{sub 2}O{sub 4}.

• OSTI ID: 21128456
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 9 Vol. 181; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CATIONS
DILATOMETRY
IRON IONS
IRON OXIDES
NEUTRON DIFFRACTION
SPINELS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
X-RAY DIFFRACTION
ZINC IONS
ZINC OXIDES