Influence of Size Effects on the Properties of Processed Iron Ore and Schungite Rock

Authors	Yu. Mirgorod¹, S. Еmelianov¹, V. Fedosjuk², S. Bolshanina³
Affiliations	¹ Southwest State University, 94, 50 Let Ockyabrya St., 305044 Kursk, Russia ² Institute of Solid State and Semiconductor Physics, National Academy of Sciences of Belarus, SSPA Scientific and Practical Center for Materials Science, 220072 Minsk, Belarus ³ Sumy State University, 2, Rimsky Korsakov St., 40007 Sumy, Ukraine
Е-mail	svet.bolshanina@gmail.com
Issue	Volume 8, Year 2016, Number 2
Dates	Received 28 March 2016; published online 21 June 2016
Citation	Yu. Mirgorod, S. Еmelianov, V. Fedosjuk, S. Bolshanina, J. Nano- Electron. Phys. 8 No 2, 02053 (2016)
DOI	10.21272/jnep.8(2).02053
PACS Number(s)	75.75.Cd.
Keywords	Size effect (6) , Physical and chemical methods, Powder (19) , Nanoparticles (70) , Iron ore, Schungite rock, Structure (105) , Specific magnetization.
Annotation	Scanning electron microscopy, energy dispersion spectroscopy, X-ray diffractometry and magnetometry methods were used to investigate the structure and magnetic properties of iron ore and schungite rock. The results show the existence of external size effect in iron ore concentrate. It is related with the penetration of iron nanoparticles from equipment surfaces onto the powder surface, which increases specific magnetic saturation of the powder by 1.6 times compared with pure magnetite. As a result of internal size effect in schungite powder its reactivity decreases by 800 °С and after heat treatment of the powder its specific magnetic saturation increases by seven times. Considering the application of size effects the investigated powders and waste natural mineral powders are recommended to be used in the production of composite materials.
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