摘要
由于碳酸锂熔点低于分解温度,碳酸锂直接煅烧难以获得较好的分解效果。本论文对以碳酸锂和氧化铝混合物料为原料煅烧制备含锂氧化物的工艺进行了研究。通过对煅烧产物的X射线衍射物相分析,探讨了混合物料中碳酸锂的分解机理。研究结果表明,碳酸锂中加入氧化铝煅烧由于生成Li 2O•Al 2O 3,使碳酸锂的分解温度大幅度地降低,在Al 2O 3与Li 2CO 3摩尔比为1.04∶1,煅烧温度高于800℃的条件下,碳酸锂分解率可达98%以上。
It is difficult to obtain good decomposition effect by direct calcination of lithium carbonate,because the melting point of lithium carbonate is lower than the decomposition temperature.The process of preparing lithium oxide by calcining the mixture of lithium carbonate and alumina was studied in the paper.The decomposition mechanism of lithium carbonate in the mixture was studied by X-ray diffraction analysis of calcined products.The results show that the decomposition temperature of lithium carbonate is greatly reduced due to the formation of Li 2O•Al 2O 3.The decomposition rate of lithium carbonate is over 98%when the mole ratio of Al 2O 3 to Li 2CO 3 is 1.04∶1 and the calcination temperature is higher than 800℃.
作者
尤晶
王耀武
贺晓军
You Jing;Wang Yaowu;He Xiaojun(Liaoning Institute of Science and Technology,Benxi 117004,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)
出处
《轻金属》
北大核心
2020年第11期4-6,15,共4页
Light Metals
基金
国家自然基金项目(51704150)。
关键词
碳酸锂
铝酸锂
煅烧
氧化锂
lithium carbonate
lithium aluminate
calcination
lithium oxide
