超重力法碳分制备纳米三水合氧化铝的研究  

Preparation of nano aluminium trihydroxide by high gravity carbonation

作　　者：王东光[1] 郭奋[1] 陈建峰[1] 张泽廷[1] 

机构地区：[1]北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室

出　　处：《北京化工大学学报（自然科学版）》2006年第3期1-5,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家'863'计划(2002AA302605)

摘　　要：通过在旋转床反应装置中碳分铝酸钠溶液成功制备出一种超薄六角片状的纳米三水合氧化铝(三水铝石)。叙述了实验过程,并讨论了超重力碳分过程中各主要操作参数对产品粒度、形貌和产率等方面的影响,以及水热老化、超重力水洗及干燥过程对产品的影响。采用TEM、XRD、BET和连续等离子光谱分析仪(SPS)对产品的形貌、粒度、晶型、比表面积、钠离子含量进行了分析表征。结果表明,产品三水铝石的颗粒形貌为超薄六角片状,晶型为gibbsite类型。根据其比表面积为26.2 m2/g,测算出当量粒度为94.24 nm,三水铝石中氧化钠质量分数为0.279%。Ultra thin hexagonal platelets of nano aluminium trihydroxide （ATH） have been synthesized by high gravity reactive precipitation using CO2 as acidifier. This paper describes the experimental procedures in detail, discusses the effects of various parameters on the carbonation process, as well as the effects of thermal hydrolysis, high gravity washing and drying on the products. The crystal phase, particle morphology, surface area and content of sodium oxide in the nano ATH product were characterized by XRD, TEM, BET and elemental analysis using a sequential plasma emission spectrometer. The results indicate that the product has an ultra thin hexagonal morphology, and the gibbsite structure. Its specific surface area is 26.2 ma/g, and the particle size is calculated to be 94.24 nm. The content of sodium oxide is 0. 279 %.

关 键 词：超重力 碳分 三水合氧化铝 

分 类 号：TQ03[化学工程] TQ133.1