摘要：Na₂O是非冶金级Al₂O的重要技术指标。本文应用D/MAX- -3BX射线衍射。IR- -440 红外光谱、化学物相分析等方法研究了赋存于氧化铝水合物中的Na2O在煅烧过程中的行为，β--Na₂O·Al₂O₃随温度升高

而分解,最终是a- -Al₂O;与Na₂O·11 Al₂O₃共存。氧化铝水合物的Na₂O含量增加,煅烧产品的a- -Al2Os含

量减少、比表面积降低。研究结果对生产及应用Al2O的行业均有益。

关键词:氢氧化铝；氧化钠；煅烧；工艺矿物

Abstract：Na₂O in an important qualification for non一metallurgical Al₂O₃. The behaviours of

Na₂O in Alumina hydrate during calcination have been studied by means of D/max- 3B X-

ray diffractometer and IR - 440 infrared spectrophotometer in this paper. β- -Na₂O·Al₂O is

decomposed while the teperature increases. The final mixtrue consists of a一Al₂O₃ and Na2O

·11Al₂O₃. As Na₂O in Alumina hydrate increases, a- - Al₂O₃of calcinated products and spe-

cific surface area decreases. The conclusion of the research will be benefit to the process and

Al₂O₃ applications.

KeyWords : Alumina hydroxide；Sodium oxide calcination ；process minerals