Ball milling and annealing effect in structural and magnetic properties of copper ferrite by ceramic synthesis
Year: 2024
Type: article
Abstract: 1. AbstractIn equilibrium at room temperature, the CuFe2O4 is an inverse spinel that present a body-centered tetragonal structure associated with a remarkable Jahn–Teller effect. However, depending on the synthesis method, as well as on the thermal and processing history, a cation rearrangement of the type (Fe3+δCu2+(1-δ))[Cu2+δ/2Fe3+1(2-δ)/2]2O4 mays occur where δ is the inversion parameter. As δ decreases from the ideal value of 1, there is a transition from tetragonal to cubic phase. This study aims to better understand the magnetic properties of the material in its pure tetragonal and cubic phases as well as in the coexistence of both phases. For this goal, samples have been synthesized using the ceramic route from high purity CuO and Fe2O3 powders mixed in a stoichiometric proportion of 1:1 and calcined in air furnace at 1000 ºC for 6 h. As synthetized sample with the cubic structure was divided in two parts and one of them was annealed at 650 ºC for 3 h to obtain a pure tetragonal spinel sample. Through ball milling and subsequent annealing processes performed in both cases, samples with a mixture of phases in different proportions have been obtained. This work demonstrates how the structure, microstructure, defects like stacking faults and deformation twins, and degree of inversion of the different phases are related to changes in magnetic properties.
Source: Journal of Alloys and Compounds
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,550
OpenAlex ID: W4402014652