Investigation of interactions in the mechanically activated α-Fe2O3/Li2CO3 reagents by thermal analysis

• Published in: Journal of thermal analysis and calorimetry 2023-02, Vol.148 (4), p.1581-1588
• Main Authors: Nikolaev, Evgeniy V., Lysenko, Elena N., Surzhikov, Anatoliy P., Elkin, Vladimir D.
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Chemical composition; Chemistry; Chemistry and Materials Science; Inorganic Chemistry; Lithium carbonate; Lithium ferrite; Measurement Science and Instrumentation; Physical Chemistry; Planetary mills; Planetary rotation; Polymer Sciences; Reactivity; Reagents; Thermal analysis; Thermogravimetric analysis; Thermogravimetry
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-022-11412-6

The paper addresses the study of the effect of different milling modes on the reactivity of the initial α-Fe 2 O 3 and Li 2 CO 3 powders by thermogravimetry and differential scanning calorimetry to obtain lithium ferrite of Li 0.5 Fe 2.5 O 4 chemical composition. The formation of the magnetic phase of ferrite was monitored by thermogravimetric analysis in a magnetic field. The powder mixture was mechanically activated in air at different processing time and vial rotation speed using a planetary mill. It was found that the reactivity of the initial reagents depends on milling energy intensity. A varied milling mode changes the pattern of the interaction between reagents, and therefore a temperature range, the number of stages and the rate of lithium ferrite formation. In these conditions, an increased vial rotation speed during milling makes a more significant contribution to the change in the powder reactivity as compared to longer milling time.