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The mechanism of formation of zinc ferrite (ZnFe2O4) from ZnC2O4·1.8H2O–2FeIIC2O4·2H2O and ZnC2O4·1.8H2O–Fe2 III(C2O4)3·6H2O mixtures is investigated. By combination of TG and XRPD measurements it has been shown that microcrystalline ZnFe2O4 forms from physical mixtures after prolonged annealing at 1000 ◦C while nanocrystalline ZnFe2O4 powders are produced by mild annealing (1 h at 500 ◦C in air) of mechanically activated mixtures. The magnetic properties of ZnFe2O4 powders obtained from physical and from milled mixtures are compared.

Synthesis and magnetic properties of ZnFe2O4 obtained by mechanochemically assisted low-temperature annealing of mixtures of Zn and Fe oxalates

BERBENNI, VITTORIO;MILANESE, CHIARA;BRUNI, GIOVANNA;MARINI, AMEDEO;
2006-01-01

Abstract

The mechanism of formation of zinc ferrite (ZnFe2O4) from ZnC2O4·1.8H2O–2FeIIC2O4·2H2O and ZnC2O4·1.8H2O–Fe2 III(C2O4)3·6H2O mixtures is investigated. By combination of TG and XRPD measurements it has been shown that microcrystalline ZnFe2O4 forms from physical mixtures after prolonged annealing at 1000 ◦C while nanocrystalline ZnFe2O4 powders are produced by mild annealing (1 h at 500 ◦C in air) of mechanically activated mixtures. The magnetic properties of ZnFe2O4 powders obtained from physical and from milled mixtures are compared.
2006
Materials Science and Engineering is concerned with admixtures of matter or the basic matter from which products are made. The category covers ceramics, paper and wood products, polymers, textiles, composites, coatings & films, and biomaterials. Other areas covered in this category include Materials Chemistry, the application of chemistry to materials design and testing; Condensed Matter/Solid State Physics, the branch of physics concerned with the structure and properties of condensed matter (superconductors, semiconductors, ferroelectrics, and dielectrics); and Physical Chemistry/Chemical Physics, the application of the concepts and laws of physics to chemical phenomena.
The Physical Chemistry/Chemical Physics category includes resources on photochemistry, solid state chemistry, kinetics, catalysis, quantum chemistry, surface chemistry, electro-chemistry, chemical thermodynamics, thermo-physics, colloids, fullerenes and zeolites. Resources dealing with (liquid) crystals and crystallography are also included in this category. This category also includes resources on atomic, molecular and chemical physics, which concerns the structure of atoms and molecules, atomic and molecular interactions with radiation, magnetic resonance and relaxation, Mossbauer effect, and atomic and molecular collision processes and interactions.
THERMOCHIMICA ACTA
no
WOS:000239888700009
2-s2.0-33746291046
Esperti anonimi
Inglese
Internazionale
STAMPA
447
2
184
189
6
Zinc ferrite; Mechanical activation; Magnetic properties
5
info:eu-repo/semantics/article
262
Berbenni, Vittorio; Milanese, Chiara; Bruni, Giovanna; Marini, Amedeo; Pallecchi, I.
1 Contributo su Rivista::1.1 Articolo in rivista
none
1.1 Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/132391
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