Investigation of nanocrystalline phases in Li-La-Fe-O system formed by the decomposition of acetylacetonato complexes(Article)
- aFaculty of Technical Sciences, University of Novi Sad, Trg D. Obradovica 6, 21000 Novi Sad, Serbia
- bInstitute of Nuclear Sciences Vinca, Laboratory of Solid State Physics, P.O. Box 522, 11001 Belgrade
- cFaculty of Mining and Geology, Laboratory for Crystallography, University of Belgrade, Djusina 7, 11000 Belgrade, Serbia
- dFaculty of Chemistry, Department of Inorganic Chemistry, University of Belgrade, P.O. Box 158, 11001 Belgrade, Serbia
- eInstitute of Physics, University of Novi Sad, Trg D. Obradovica 4, 21000 Novi Sad, Serbia
Abstract
Applying a new synthesis route based on the thermal decomposition of a mixture acetylacetonato complexes, Li(AA), La(AA)3 and Fe(AA)3, Li, La ferrite (Li0.5La0.08Fe2.42O4) was formed. The element analysis performed by ICP technique and the Rietveld refinement data indicate that the sample is composed of three phases: Li0.5La0.08Fe2.42O4 (69%, SG P4332, a = 8.3445(3) Å), La0.14Fe3O4 (16%, SG F d over(3, ̄) m, a = 8.403(1) Å) and LiFeO2 (15%, SG F m over(3, ̄) m, a = 4.2291(8) Å). A partial substitution Fe3+ → La3+ in Li ferrite and La insertion at 16c site in Fe3O4 occur at low concentrations. A partial cation ordering at 4b and 12d octahedral sites in Li0.5La0.08Fe2.42O4 was noticed. TEM micrograph shows that the nanoparticles are spherically shaped and that the particle distribution is in the range between 7 and 33 nm. The sample exhibits superparamagnetic behavior, thus the composite has potential industrial applications. © 2006 Elsevier B.V. All rights reserved.
Indexed keywords
| Engineering controlled terms: | ComplexationCrystal structureLithium alloysPositive ionsPyrolysisSuperparamagnetismSynthesis (chemical)X ray diffraction |
|---|---|
| Engineering uncontrolled terms | Acetylacetonato complexesMagnetic measurementsParticle distributionRietveld refinement |
| Engineering main heading: | Nanostructured materials |
Funding details
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1
The Serbian Ministry of Science, Technology and Development supported this work financially. We thank Professor Natasa Bibic for use of TEM equipment.
- ISSN: 09258388
- CODEN: JALCE
- Source Type: Journal
- Original language: English
- DOI: 10.1016/j.jallcom.2006.03.042
- Document Type: Article
- Publisher: Elsevier BV
Kremenović, A.; Institute of Nuclear Sciences Vinca, Laboratory of Solid State Physics, P.O. Box 522, ;
© Copyright 2019 Elsevier B.V., All rights reserved.
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