|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||9th International Symposium on High Temperature Metallurgical Processing
||Preparation of Manganese Ferrite by Low-temperature Solid-state Synthesis under CO-CO2 Atmosphere
||Bingbing Liu, Yuanbo Zhang, Juan Wang, Manman Lu, Zijian Su, Guanghui Li, Tao Jiang
|On-Site Speaker (Planned)
Traditional solid-state reaction methods for synthesis of manganese ferrites are carried out under air atmosphere and characterized as high temperature and long roasting time. This study proposed a low-temperature solid-state synthesis of manganese ferrite from MnO2 and Fe2O3 roasted under CO-CO2 atmosphere. Theoretical calculation indicated that the reactive capacity of manganese oxides with Fe2O3 was in this order, MnO>Mn3O4>Mn2O3>MnO2. Hence regulation of the MnO2 to MnO was important for the low-temperature synthesis. The reduction of MnO2 to MnO is much easier than the decomposition of MnO2 to MnO under oxidizing atmosphere. This provided a forceful support for the design of low-temperature synthesis. Experimental result demonstrated that the suitable temperature for the synthesis of manganese ferrites under CO-CO2 atmosphere was 200 oC lower than that under air. More importantly, properties of the synthetic manganese ferrite prepared under CO-CO2 atmosphere were well and similar to that prepared under air.