Hydrothermally prepared nanocrystalline Mn–Zn ferrites: Synthesis and characterization

 
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Hydrothermally prepared nanocrystalline Mn–Zn ferrites: Synthesis and characterization

Nalbandian, L.
Delimitis, Α.
Deligianni-Giannakoudaki, Eleni
Zaspalis, Vasileios
Bakogiannakis, Dimitrios
Peleka, Effrosyni

Nanocrystalline particles of MnxZn1xFe2O4 were prepared by chemical precipitation of hydroxides, followed by hydrothermal processing and freeze–drying. The synthesis involves the hydrolysis of aqueous metal precursors by using ammonia as precipitating agent. The chlorine ion concentration in the solution and the pH of the precipitation, are shown to play a crucial role in retaining the initial stoichiometry of the solution to the nanoparticles. The obtained products exhibited some interesting and unique features: they consisted of nanoparticles with sizes ranging from 5 to 25 nm, they had surface areas between 60 and 110 m2 g1 and pore sizes in the mesopore region (i.e. 8–20 nm). The produced materials were examined by powder X-ray diffraction for crystalline phase identification, scanning electron microscopy for grain morphology, high resolution transmission electron microscopy for particle size distribution and nitrogen sorption for surface area, pore volume and pore size distribution determination. The sintering of the ferrite powders was also studied by thermogravimetric analysis and dilatometry of the powders mixed with an organic binder to improve their compaction properties.

Article / Άρθρο
info:eu-repo/semantics/article

Ferrites
Μαγνητικά υλικά
Magnetic materials Nanocrystalline
Φερρίτες
Νανοκρυσταλλικά υλικά

Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (EL)
Aristotle University of Thessaloniki (EN)

Αγγλική γλώσσα

2008
2009-06-29T16:58:48Z


Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης, Σχολή Θετικών Επιστημών, Τμήμα Χημείας

urn:ISSN:13871811
Microporous and Mesoporous Materials, vol.114 [2008] p.465-473 [Published Version]

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info:eu-repo/semantics/openAccess



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