The study of thermal, microstructural and magnetic properties of manganese–zinc ferrite prepared by co-precipitation method using different precipitants
Irena Szczygieł , Katarzyna Winiarska , Agnieszka Sobianowska-Turek
AbstractMn–Zn ferrite was prepared from the solution after acid leaching of spent batteries by co-precipitation method using ammonia oxalate, sodium carbonate and sodium hydroxide as precipitating agents. The co-precipitation process was performed at temperature of over 50 C by continuous magnetic stirring. The precipitates were pre-sintered at 850 C in air. Dilatometric study has revealed that lowest shrinkage (only 5.6%) showed a material obtained from an oxalate precipitant. After pressing and high-temperature sintering at 1325 C, it showed both insufficient density and the presence of pores, which contribute to the deterioration in the magnetic properties of the ferrites: the low magnetic permeability value and high magnetic losses. Ferrite prepared from hydroxide and carbonate precipitant showed a much higher shrinkage, sintered density and much higher magnetic permeability compared with the ferrite prepared from oxalate precursor.
|Journal series||Journal of Thermal Analysis and Calorimetry, ISSN 1388-6150, e-ISSN 1572-8943, (A 20 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Mn–Zn ferrite, Co-precipitation, Battery Scrap, Microstructure, Magnetic Properties, TGA–DTA/DIL/XRD/ SEM|
|Publication indicators||= 4; : 2017 = 1.073; : 2017 = 2.209 (2) - 2017=1.917 (5)|
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