摘要
选用有机铝盐(异丙醇铝和醋酸铝)为原料,分别以氨水和尿素为沉淀剂,在200℃的乙醇溶剂热条件下,制备出白色前驱物粉末。通过SEM,XRD和BET等分析手段对产物进行了表征,考察原料与沉淀剂对产物的影响。结果表明:不同原料得到不同形貌的纳米γ-AlOOH,微观形貌分别为纳米级棒状和片状物;溶剂和沉淀剂种类会影响产物的比表面,采用尿素可使比表面积达到218.64m2/g。同时进一步从结晶机理方面分析了这一结果的成因。
The white powder precursors were prepared at 200℃ with organic aluminum salt as materials,with ethanol as solvent,and with ammonia and urea as precipitator respectively.The samples were studied by SEM,XRD and BET techniques.The results show that nano-rods and nano-flakes of γ-AlOOH are achieved by aluminum isopropoxide and aluminum acetate respectively.The specific surface area of product is affected by the type of solvent and precipitant,the highest being 218.64m2/g with urea as precipitator.The causes of formation were analyzed further from the crystallization mechanism.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2012年第1期89-92,共4页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(20776070
21076110)
关键词
有机铝盐
溶剂热法
γ-AlOOH
结晶机理
organic aluminum salt
solvent-thermal approach
γ-AlOOH
crystallization mechanism
