ASSESSMENT OF THE PARTICLE SIZE AND MORPHOLOGY IN FERROXIDE NANOSIZED POWDERS

作者：Balabanova Emilia^*; Slavov Lubomir; Merodiiska Toshka; Nedkov Ivan; Kusano Yoshi

来源：Comptes Rendus de l Academie Bulgare des Sciences, 2011, 64(11): 1541-1548.

• nanostructured materials
• oxide materials
• precipitation
• microstructure
• transmission electron microscopy
• TEM
• X-ray diffraction

The great interest in nanosized iron spinels is determined by the variety of applications that they have in electronics and biomedicine. The technology tends to miniaturise the devices and to maximise the efficiency so that the importance of accurate assessment of the particle size in the nanometric scale has become of great interest. This task is not always easy to achieve. The aim of this paper is to compare the results obtained by two techniques (XRD and HRTEM) for the characterisation of the particle size in the nanometric region. Nanosized iron spinels with chemical formulae Fe3-xMxO4 (M = Cu, Co), synthesized by the soft chemistry method - co-precipitation, are investigated. Two types of co-precipitated magnetite (Fe3O4), with different average particle sizes, are also included. The mean particle size is calculated by Sherrer's formula from XRD spectra and by statistic calculations based on HRTEM image analysis. It is shown that the two methods give close results for the mean sizes. The observed differences in the mean particle sizes between the two methods are of 1 to 5%. Particle size distribution (PSD) of all samples is also presented.

• 出版日期2011