Mechanochemical synthesis of stoichiometric MgFe2O4 spinel

• Published in: Journal of materials science. Materials in electronics 2009-08, Vol.20 (8), p.782-787
• Main Authors: PAVLOVIC, M, JOVALEKIC, C, NIKOLIC, A. S, MANOJLOVIC, D, SOJIC, N
• Format: Article
• Language: English
• Subjects: Applied sciences; Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Magnetic properties and materials; Materials Science; Materials synthesis; materials processing; Metals. Metallurgy; Optical and Electronic Materials; Physics; Powder metallurgy. Composite materials; Production techniques; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Technology
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-008-9802-2

The influence of long-term milling of a mixture of (1) MgO and α-Fe 2 O 3 , (2) MgCO 3 , and α-Fe 2 O 3 , and (3) Mg(OH) 2 and α-Fe 2 O 3 powders in a planetary ball mill on the reaction synthesis of nanosized MgFe 2 O 4 ferrites was studied. Mechanochemical reaction leading to formation of the MgFe 2 O 4 spinel phase was followed by electron microscopy, (SEM and TEM), X-ray diffraction and magnetization measurements. The spinel phase was observed first in cases (1) and (2) after 5 h of milling, and its formation was observed in all cases after 10 h. The synthesized MgFe 2 O 4 ferrite has a nanocrystalline structure with a crystallite size of about 11, 10, and 12 nm, respectively for cases (1)–(3). Magnetic measurements after 10 h of milling show magnetization values of 19.8 J/(Tkg), 23.5 J/(Tkg) and 13.8 J/(Tkg), respectively for the cases (1)–(3).