Na_2O在Al（OH）_3颗粒中的赋存状态及煅烧过程的行为  

Na_2O in alumina hydrates and its behavior during calcining

作　　者：罗玉长[1] 毕亚娟[1] 罗鹤鹏[1] 

机构地区：[1]山东铝业公司研究院,山东工业大学

出　　处：《粉体技术》1995年第5期12-17,共6页

摘　　要：Ｎａ２Ｏ是非冶金级Ａｌ２Ｏ３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α—Ａｌ２Ｏ３与Ｎａ２Ｏ·１１Ａｌ２Ｏ３共存。氧化铝水合物的Ｎａ２Ｏ含量增加，煅烧产品的α—Ａｌ２Ｏ３含量减少、比表面积降低。研究结果对生产及应用Ａｌ２Ｏ３的行业均有益。Na2O in an important qualification for non-metallurgical Al2O3. The behaviours ofNa2O 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. Al2O3 isdecomposed while the teperature increases.The final mixtrue consists of α-Al2O3 and Na2O·11Al2O3. As Na2O in Alumina hydrate increases,α-Al2O3 of calcinated products and specific surface area decreases.The conclusion of the research will be benefit to the process andAl2O3 applications.

关 键 词：氢氧化铝 氧化钠 煅烧 赋存状态 

分 类 号：TQ133.1[化学工程—无机化工]