(1. 中南大學(xué) 冶金科學(xué)與工程系， 長沙 410083；
2. 中南大學(xué) 粉末冶金國家重點實驗室， 長沙 410083)
摘 要: 以堿式乙酸鋁和氨水為前驅(qū)物，以水為反應(yīng)介質(zhì)，在不同溫度和不同恒溫時間下水熱合成一水軟鋁石粉體，隨著溫度升高和保溫時間延長，合成粉體結(jié)晶度變好，晶粒變大。在溫度為160 ℃，恒溫時間為2 h，制備出了結(jié)晶度好、平均粒徑約30 nm的一水軟鋁石粉體。并通過SEM觀察、X射線衍射分析和粉體比表面積的測量對合成的粉體進(jìn)行了表征，并用截線法確定了粉體的平均粒徑。
關(guān)鍵字: 一水軟鋁石； 粉體； 水熱合成
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
