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Characterization of BiFeO3 nanopowder obtained by mechanochemical synthesis

✍ Scribed by I. Szafraniak; M. Połomska; B. Hilczer; A. Pietraszko; L. Kępiński

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
549 KB
Volume
27
Category
Article
ISSN
0955-2219

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✦ Synopsis

Bismuth ferrite nanopowders have been obtained by mechanochemical synthesis. The materials were characterized by high resolution electron microscopy, X-ray diffraction and NIR Raman scattering. The XRD pattern of the powder consists of reflections, characteristic of BiFeO 3 perovskite structure, superimposed on broad maxima that can be ascribed to an amorphous/disordered phase. The analysis of the two broad bands at low 2θ angle yields mean distances of about 3 and 1.8 Å which may be related to Bi O and Fe O bonds, respectively. The powder consists of loosely packed grains with a broad distribution of sizes between a few nm and 45 nm. The grains of sizes larger than about 30 nm exhibit well-developed crystalline structure.

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