Influence of the nature of iron, aluminium and yttrium organometallic nanocluster precursors on the formation mechanism of ceramic ZrO2 obtained by sol-gel method

To obtain new effective precursors for single phase ceramic zirconia materials by the alkoxide route, three heterometallic iron-yttrium acetylacetonate complexes were synthesized by electrochemical anodic dissolution in acetylacetone. The structure and properties of the synthesized complex oxides we...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 1997-02, Vol.8 (1-3), p.213-221
Main Authors: Ellert, O. G., Petrunenko, I. A., Tsodikov, M. V., Bukhtenko, O. V., Kochubey, D. I., Maksimov, Yu. V., Dominguez-Rodriguez, A., Cumbreras, F. L., Navio, J. A.
Format: Article
Language:English
Subjects:
Acetylacetone
Aluminum
Anodic dissolution
Ceramic bonding
Ceramics
Coordination compounds
Dissolution
Gels
Iron
Magnetic permeability
Nanoclusters
Precursors
Sol-gel processes
Synthesis
Yttrium
Zirconium dioxide
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Summary:To obtain new effective precursors for single phase ceramic zirconia materials by the alkoxide route, three heterometallic iron-yttrium acetylacetonate complexes were synthesized by electrochemical anodic dissolution in acetylacetone. The structure and properties of the synthesized complex oxides were studied by XRD, EXAFS, magnetic susceptibility and Mössbauer. It was shown that, for iron-containing gels and oxides, Fe3+ ions—interchangeably with Y3+—participate in the oxide formation mechanism. The sets of interatomic distances found by EXAFS in the iron-yttrium precursor and in the zirconia gel are practically equal. The presence of structure fragments formed by these interactions—and especially by direct Fe-Y bonds in the precursors—allows single-phase triple ceramic oxides to form.
ISSN:0928-0707
1573-4846
DOI:10.1007/BF02436843