【作者】 郭俊明； 刘贵阳； 王锐； 王宝森； 何英； 陈克新；

【Author】 GUO Jun-ming1, LIU Gui-yang2, WANG Rui1, WANG Bao-sen2,HE Ying2, CHEN Ke-xin3 (1. School of Chemistry and Biotechnology, Yunnan Nationalities University, Kunming 650031, China; 2. College of Science, Honghe University, Mengzi 661100, China; 3. Department of Material Science and Engineering, Tsinghua University, Beijing 100084, China)

【机构】 云南民族大学化学与生物技术学院； 红河学院材料研究室； 清华大学材料系；

【摘要】 以醋酸锂和醋酸锰为原料,研究了保温温度和时间对醋酸盐体系熔盐燃烧合成尖晶石型LiMn2O4的影响。实验结果表明,利用醋酸锂和醋酸锰晶体具有低熔点的特性,不外加任何燃料,通过熔盐燃烧合成法可制备得到高纯尖晶石型LiMn2O4物质,杂质为Mn3O4或Mn2O3。在200℃熔融混合预处理5min,再熔盐燃烧反应保温70min制备LiMn2O4物质,以600℃为最佳加热温度;加热温度为600℃时,以反应保温6h得到产物中LiMn2O4物质的含量最多,杂质Mn2O3含量最少;在加热温度600℃,要提高产物中LiMn2O4的含量,二次焙烧效果比一次性单纯延长保温时间的效果好。更多还原

【Abstract】 Effect of calcinations temperatures and times spinel LiMn₂O₄ prepared by molten-salt combustion synthesis in acetate system was studied, using acetate lithium and manganese as starting materials. Experimental results indicated that spinel LiMn₂O₄ with high purity were prepared successfully, using low-melting point acetate without any other fuels. The impurity phase was Mn3O4 or Mn2O3. The optimal calcination temperature of the product pretreated at 200℃ for 5min and calcined for 70min was 600℃. The content of LiMn₂O₄ in the product calcined at 600℃ for 6h was the highest, and the content of impurity Mn2O3 was the least. Second calcination was better than direct calcination to enhance the content of LiMn₂O₄ at 600℃.更多还原