制备高纯度α-Al_2O_3粉体的工艺研究  

Study on technology of preparing high-purity α-Al_2O_3 powder

作　　者：吴沙沙[1] 王俊勃[1] 江燕[1] 王彦龙[1] 赵文杰[1] 杨尔慧 

机构地区：[1]西安工程大学机电工程学院,陕西西安710048

出　　处：《应用化工》2015年第10期1816-1819,共4页Applied Chemical Industry

基　　金：陕西省教育厅专项科研计划项目(14JK1312)

摘　　要：以硝酸铝和碳酸铵为原料,采用化学沉淀法,在不同硝酸铝浓度下制备Al2O3的前驱体Al(OH)3,再经不同温度煅烧得到Al2O3粉体。利用TG-DTG、XRD、BET及SEM等分析手段对粉体的性能进行了表征。结果表明,煅烧温度对Al2O3的晶型有着重要的影响,硝酸铝浓度为0.1 mol/L时制备出的粉体分散性较好,经1 200℃煅烧能制备出纯度较高的形貌类似球形的α-Al2O3粉体。The precursor Al（ OH）3of Al2O3 were prepared by chemical precipitation with aluminium nitrate and sal volatile under different concentration of aluminium nitrate,and Al2O3 powders were getted through calcining precursor at different temperature. The powders were analyzed by the TG-DTG,XRD,BET and SEM. The results showed that the calcination temperature was an important factor to the crystal form of the Al2O3 powder. The powders with good dispersing were obtained when the concentration of aluminium nitrate was 0. 1 mol / L. The sphere-like α-alumina powders with high purity were obtained when the calcination temperature was 1 200 ℃.

关 键 词：化学沉淀法 Α-AL2O3 前驱体 煅烧温度 浓度 

分 类 号：TQ016.1[化学工程] TQ110.6