摘要
温度在四氧化三钴生产中是一个重要的控制因素,不稳定会导致粉末指标大的波动。采用两种温度工艺合成球形碳酸钴,利用XRD和TEM分析其生长机理,不同温度下呈现不同的优势生长面,高温下为多晶结构,低温单晶,通过SEM看高温碳酸钴表面颗粒呈棒状,低温为细颗粒堆叠。以低温合成的球形碳酸钴为原料,采用高温煅烧方法,制备球形四氧化三钴。系统研究了不同温度和不同升温速率下热性能、粒径、物相的变化。通过这些条件实验揭示了改变温度条件及不同升温速率下碳酸钴的生长规律及其内在分解原理。
Temperature is an important control factor in the production of cobalt tetroxide,and instability can lead to large fluctuations in the powder index.Spherical cobalt carbonate was synthesized by two temperature processes,and its growth mechanism was analyzed by XRD and TEM.Different dominant growth surfaces were presented at different temperatures,polycrystalline structure at high temperature,and single crystal at low temperature.The surface particles of cobalt carbonate at high temperature were rod-like,and f ine particles were stacked at low temperature.Spherical cobaltous tetroxide was prepared from spherical cobalt carbonate synthesized at low temperature by calcination at high temperature.The changes of thermal properties,particle size and phase at different temperatures and heating rates were systematically studied.The growth rule and decomposition principle of cobalt carbonate under different temperature conditions and heating rate were revealed through these experiments.
作者
辛勇诚
XIN Yongcheng(Guangdong Brunp Recycling Cycle Technology Co.,Ltd.,Foshan 528244,China)
出处
《化工管理》
2024年第20期139-141,149,共4页
Chemical Management
关键词
烧结
碳酸钴合成
四氧化三钴
固相反应
烧结机理
sintering
cobalt carbonate synthesis
cobalt tetroxide
solid phase reaction
sintering mechanism
