钴铝水滑石煅烧尖晶石相氧化产物的制备及表征  

PROPERTIES AND SYNTHESIS OF SPINEL OXIDES BY CALCINED CO-AL-LDHS

作　　者：王安琪[1] 王滔[1] 杨俊[1] 陈龙[1] 吴秀玲[1] 刘晓[2] 

机构地区：[1]中国地质大学材料与化学学院,教育部纳米矿物材料及应用工程研究中心,武汉430074 [2]无机合成与制备化学国家重点实验室吉林大学化学学院,长春130012

出　　处：《中国陶瓷》2012年第6期9-11,16,共4页China Ceramics

摘　　要：采用共沉淀法合成Co-Al-LDHs类水滑石前躯体,通过煅烧得到尖晶石氧化粉体,并研究了不同保温时间和煅烧温度对尖晶石氧化粉体结构的影响,借助XRD和TG对前躯体及其氧化粉体的结构进行表征,采用SEM对氧化粉体形貌表征。结果表明,采用共沉淀法制备的前躯体具有典型的水滑石结构,前驱体的热分解温度分别为200℃和240℃。前驱体铝类水滑石在900℃煅烧和4h保温的条件下得到钴铝氧化粉体的尖晶石结晶性良好,粒径细小均匀。实验制备工艺条件简单且产物结晶性良好的尖晶石,为钴铝尖晶石的制备提供一个具有实际应用价值的制备方法。Co-Al-LDHs sample was synthesized by the method of co-precipitation. The spinel cobaltaluminate （CoAl2O4） could be derived from calcined Co-Al-LDHs, and the effects of calcining temperature and holding time were investigated. The structures of the precursor and oxide powder were characterized by means of XRD, TG and SEM. The results suggested that the precursor synthesized by the method of co-precipitation sample was the typical hydrotalcite structure and the temperature of thermal decomposition is 200℃ and 240℃. The best calcining condition is considered for 4 hours and under 900℃to synthesize and spinel oxide powder .The condition of preparation is simple and the product is well-crystallization spinel. The preparation is a practical application value method for synthesizing spinel cobalt-aluminate.

关 键 词：钴铝尖晶石 水滑石结构 共沉淀法 煅烧 

分 类 号：O614[理学—无机化学]