Mechanochemical synthesis of spinel cobalt ferrite nanopowders: Mathematical modeling and experiment

• Published in: Ceramics international Vol. 49; no. 18; pp. 29838 - 29848
• Main Authors: Lapshin, Oleg, Nevmyvaka, Anna, Itin, Volya, Ivanova, Oksana
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.09.2023
• Subjects: Mechanochemical synthesis; Nanoparticles; Spinel cobalt ferrite; Theory and modeling; Nanoparticles; Spinel cobalt ferrite; Theory and modeling; Mechanochemical synthesis
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2023.06.241

The mechanochemical synthesis of a three-component powder mixture in a high-energy mill has been experimentally and theoretically studied using a macroscopic mathematical model. The modes of mechanochemical synthesis of nanoproducts with the required characteristics were determined. The discrete operating mode of the mill automatically ensures the development of the chemical process under “soft”, almost isothermal conditions, rather than in an explosive mode. The addition of inert sodium chloride optimizes the mechanochemical synthesis of nanoparticles. An analytical formula linking the degree of mechanochemical conversion with the time of mechanical treatment and the concentration of the inert component in the starting mixture was derived. Theoretical calculations were analytically compared with experimental data on the mechanochemical synthesis of spinel cobalt ferrite nanopowders.