Investigation of the ferritization process in the Co2+–Fe2+–SO42−–OH− system under the action of contact non-equilibrium low-temperature plasma.

The influence of the initial pH of the solution on ferritization in the Fe²⁺–Co²⁺–SO₄²⁻–OH⁻ system was investigated. Cobalt ferrite was obtained by a combined method of co-precipitation and treatment with contact low-temperature non-equilibrium plasma. The pH varied in the range of 7–12. The phase composition was determined by X-ray phase analysis. Magnetic properties by vibration magnetometry. The stability of the formed complexes was evaluated by the cyclic voltammograms method. Studies have shown that PNC treatment promotes ferritization. In this case, by varying the initial pH value, you can get products with different technological characteristics. As the initial pH value increases, the oxidation rate decreases. According to X-ray examination, with increasing initial pH of the suspension, the degree of crystallinity of the final product increases, and the magnetic parameters (saturation magnetization, forced force) also increase rapidly. The formation of cobalt ferrite occurs at an initial pH 11–12 [ABSTRACT FROM AUTHOR]