Magnetization as an effective tool for kinetics evaluation in mechanochemical synthesis of chalcopyrite CuFeS.sub.2./sub.

0539429 - FZÚ 2021 RIV PL eng J - Journal Article
Baláž, P. - Baláž, M. - Dutková, E. - Hegedüs, M. - Rajňák, M. - Knížek, Karel - Hejtmánek, Jiří - Navrátil, J. - Achimovičová, M. - Briančin, J.
Magnetization as an effective tool for kinetics evaluation in mechanochemical synthesis of chalcopyrite CuFeS₂.
Acta Physica Polonica A. Roč. 137, č. 5 (2020), s. 647-649. ISSN 0587-4246. E-ISSN 1898-794X
R&D Projects: GA ČR GA18-12761S
Institutional support: RVO:68378271
Keywords : chalcopyrite * mechanochemical synthesis * magnetometry * magnetic semiconductor
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 0.577, year: 2020
Method of publishing: Open access
https://doi.org/10.12693/APhysPolA.137.647

Copper, iron, and sulphur in elemental form were applied for mechanochemical synthesis of chalcopyrite CuFeS2. Products of synthesis were characterized by XRD method and evaluated by Rietveld analysis. A mixture of cubic (JCPDS 75-6866) and tetragonal (JCPDS 37-0471) phases of chalcopyrite with almost identical diffractograms were identified. Both phases are nanocrystalline with sizes 13 nm and 7 nm for laboratory and industrial milling, respectively. For determination of iron consumption during the synthesis, method of magnetometry has been applied. Based on magnetization data reflecting time dependent incorporation of elemental iron into chalcopyrite nanostructure, the kinetics of the synthesis was evaluated. From kinetic data the rate constant of reaction k,as well as the conversion degree R were determined.
Permanent Link: http://hdl.handle.net/11104/0317180