(1. 中南大学 冶金科学与工程系， 长沙 410083；
2. 中南大学 粉末冶金国家重点实验室， 长沙 410083)
摘 要: 以碱式乙酸铝和氨水为前驱物，以水为反应介质，在不同温度和不同恒温时间下水热合成一水软铝石粉体，随着温度升高和保温时间延长，合成粉体结晶度变好，晶粒变大。在温度为160 ℃，恒温时间为2 h，制备出了结晶度好、平均粒径约30 nm的一水软铝石粉体。并通过SEM观察、X射线衍射分析和粉体比表面积的测量对合成的粉体进行了表征，并用截线法确定了粉体的平均粒径。
关键字: 一水软铝石； 粉体； 水热合成
characterizations of boehmite powder
（1. Department of Metallurgical Science and Engineering,
Central South University, Changsha 410083, P.R.China；
2. State Key Laboratory for Powder Metallurgy，
Central South University, Changsha 410083, P.R.China）
Abstract:Nanometer-sized boehmite powders with the minimum mean particle size 30 nm were successfully prepared by hydrothermal method in the autoclave with autogeneous pressure. The optimum hydrothermal conditions, temperature 160 ℃， isothermal time 2 h, were obtained to get desirable boehmite powder with relatively well crystallized and little agglomerations. Characterizations were carried out with X-ray diffractometer， the scanning electronic micrograph and the specific area measurement.
Key words: hydrothermal synthesis; nano-meter size; boehmite powder
