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Sonochemical Synthesis of Amorphous Yttrium Iron Oxides Embedded in Acetate Matrix and their Controlled Thermal Crystallization toward Garnet (Y3Fe5O12) and Perovskite (YFeO3) Nanostructures
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SYSNO ASEP 0350463 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Sonochemical Synthesis of Amorphous Yttrium Iron Oxides Embedded in Acetate Matrix and their Controlled Thermal Crystallization toward Garnet (Y3Fe5O12) and Perovskite (YFeO3) Nanostructures Author(s) Pinkas, J. (CZ)
Reichlová, V. (CZ)
Serafimidisová, A. (CZ)
Moravec, Z. (CZ)
Zbořil, R. (CZ)
Jančík, D. (CZ)
Bezdička, Petr (UACH-T) SAI, RID, ORCIDSource Title Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 114, č. 32 (2010), s. 13557-13564Number of pages 8 s. Language eng - English Country US - United States Keywords sol-gel method ; magnetic-properties ; iron(III) oxide Subject RIV CA - Inorganic Chemistry CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000280727500022 DOI 10.1021/jp104091n Annotation Sonolysis of stoichiometric mixtures of tris(2,4-pentanedionato)iron, Fe(acac)(3), and tris(2,4-pentanedionato)yttrium, Y(acac)(3)(H2O)(3), under Ar atmosphere in tetraglyme led to a colloidal solution from which amorphous Y-Fe-O nanopowders could be precipitated by hexane. These powders are composed of amorphous nanoparticles (3 nm) of yttrium iron(III) oxide embedded in an acetate matrix as proved by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), mass spectrometry, and Mossbauer and IR spectroscopy. The increasing amount (0, 2, 6%) of added water in the reaction mixture was found to lower the organics content in the sonochemical products. The thermally induced crystallization of the amorphous Y-Fe-O nanoparticles was studied by thermal analysis (TG/DSC), evolved gas analysis (EGA), high-temperature XRD, and Mossbauer spectroscopy. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2011
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