甘露醇-硝酸铝溶液燃烧法制备γ-Al_2O_3纳米粉体  

Synthesis of γ-Al_2O_3 Nano-sized Powders by Solution-combustion Using Mannitol and Aluminum Nitrate

作　　者：符荣[1,2] 凌凤香[2] 季洪海[2] 肖锦春[1,2] 

机构地区：[1]辽宁石油化工大学,辽宁抚顺113001 [2]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《当代化工》2014年第11期2231-2233,2237,共4页Contemporary Chemical Industry

摘　　要：以九水硝酸铝，甘露醇和氨水的混合溶液作为前驱体溶液，采用溶液-燃烧法直接焙烧一步合成纳米γ-Al2O3。利用XRD、TEM和N2吸附-脱附等方法对最终形成的氧化铝进行了表征。结果表明，九水硝酸铝与甘露醇物质的量之比为26：15，前驱体溶液的pH值为4，焙烧温度为800℃，焙烧时间为4 h，在此条件下，可制备出蓬松且晶粒尺寸在4~6 nm之间的γ-Al2O3纳米粉体。Nano-sized γ-Al2O3 power was prepared by solution-combustion method using aluminum nitrate nonahydrate and mannitol as raw materials. XRD,TEM and N2 adsorption were used to characterize the prepared γ-Al2O3 power. The experimental results indicate that nano-sized γ-Al2O3 powers （particle size of 4~6 nm） can be obtained by solution-combustion when the reaction conditions are as follows： the molar ratio of aluminum nitrate nonahydrate to mannitol is 26：15, pH value of the precursor is 4,the calcining temperature is 800℃,the calcining time is 4 h.

关 键 词：溶液-燃烧法 纳米γ-Al2O3 甘露醇 

分 类 号：TQ133[化学工程—无机化工]