以金属铝水解制氢副产品为原料制备α-Al_2O_3粉体的研究  

Preparation of α-Al_2O_3 powder from byproduct of hydrogen generation by aluminum hydrolysis

作　　者：张莉[1] 赵惠忠[1] 张寒[1] 龚光波 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081 [2]武汉市东西湖区金波能源设备厂,湖北武汉430040

出　　处：《武汉科技大学学报》2012年第2期109-112,共4页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金资助项目(50774057)

摘　　要：以金属铝-水反应法制氢的副产品为主要原料,添加表面活性剂十二烷基苯磺酸钠、晶种α-Al2O3和相变促进剂ZnF2,在实验室制得α-Al2O3粉体,并利用ICP、XRD、TG-DSC、SEM、物理吸附仪等对试样进行表征。结果表明,该金属铝-水反应法制氢的副产品干燥后为单斜型三羟铝石(Al(OH)3),纯度高达99.58%,经过1 300℃×3h高温处理后完全转化为α-Al2O3;以十二烷基苯磺酸钠作为表面活性剂,添加1%的ZnF2作为相变促进剂和1%的纳米α-Al2O3作为晶种,该副产品在1 200℃下即可完全转化为α-Al2O3,粉体的比表面积为6.17m2/g,平均粒径为244nm。Using SDBS as the stabilizer and adding 1% crystal seed and 1% phase-transition additive ZnFz, a-Al2O3 powder was prepared from the byproduct of hydrogen generation by aluminum hydrol- ysis in the laboratory. The powder was analyzed by ICP, XRD, TG-DSC, SEM and physical adsorp- tion instrument. The results show that the byproduct after drying is monoclinic crystal bayerite whose purity reaches 99.58%, and after being fired for 3 h at 1 300 ℃, it is transformed completely to a- Al2O3. With SDBS as the dispersing agent, 1% ZnF2 as phase-transition additive and 1% crystal seed, it can be completely transformed to a-A1203 at 1 200 ℃, whose surface area is 6.17 m2/g and whose average particle size is 244 nm.

关 键 词：金属铝水解制氢副产品 α-Al2O3粉体 制备 性能 

分 类 号：TB32[一般工业技术—材料科学与工程]