氧化铝的水热化学研究Ⅳ.α-Al_2O_3的再水合现象  

The Hydrothermal Behavior of Alumina Ⅳ. Rehydration of α-Al_2O_3

作　　者：叶岗[1] 李光辉[1] 张明海[1] 

机构地区：[1]石油化工科学研究院,北京100083

出　　处：《物理化学学报》1996年第12期1098-1102,共5页Acta Physico-Chimica Sinica

摘　　要：The rehydration of several α-Al2O3 has been investigated by means of XRD,DTA, TG and nitrogen adsorption methods. It is found that all α-Al2O3 samples arecapable of rehydration at 250℃ and under saturated pressure. The rehydrated products depend on starting α-Al2O3. α-Al2O3 dehydrated at above 1000℃ rehydrates toboehmite, α-Al2O3 derived from diaspore at low temperatures rehydrates to diaspore.The quantitative analysis of the rehydration of α-Al2O3 has been studied.The rehydration of several α-Al2O3 has been investigated by means of XRD,DTA, TG and nitrogen adsorption methods. It is found that all α-Al2O3 samples arecapable of rehydration at 250℃ and under saturated pressure. The rehydrated products depend on starting α-Al2O3. α-Al2O3 dehydrated at above 1000℃ rehydrates toboehmite, α-Al2O3 derived from diaspore at low temperatures rehydrates to diaspore.The quantitative analysis of the rehydration of α-Al2O3 has been studied.

关 键 词：氧化铝 氧化铝水合物 再水合 水热反应 

分 类 号：O614.31[理学—无机化学]