CAJ | 학술논문

以异丙醇铝为原料采用溶胶凝胶技术制备水合氧化铝前驱体,经热处理制得纳米氧化铝粉体.采用正交实验设计研究了热处理工艺条件对纳米氧化铝粉体的尺寸和形貌的影响规律.结果表明,热处理工艺参数对Al2O3粒子颗粒特性的影响由强到弱的次序为:煅烧温度、水合氧化铝在300℃分解温度点的保温时间、在煅烧温度点的保温时间;通过控制其热处理工艺参数,可获得一定尺寸范围的大小均匀,分散性好的球形γ-Al2O3粉体;制备尺寸为8 nm的球形γ-Al2O3粉体的最佳的热处理工艺参数为:煅烧温度900℃,在煅烧温度点保温4 h,在300℃温度点不保温.
이이병순려위원료채용용효응효기술제비수합양화려전구체,경열처리제득납미양화려분체.채용정교실험설계연구료열처리공예조건대납미양화려분체적척촌화형모적영향규률.결과표명,열처리공예삼수대Al2O3입자과립특성적영향유강도약적차서위:단소온도、수합양화려재300℃분해온도점적보온시간、재단소온도점적보온시간;통과공제기열처리공예삼수,가획득일정척촌범위적대소균균,분산성호적구형γ-Al2O3분체;제비척촌위8 nm적구형γ-Al2O3분체적최가적열처리공예삼수위:단소온도900℃,재단소온도점보온4 h,재300℃온도점불보온.
Nano Al2O3 powders were obtained after the heat treatment of the hydrous alumina fabricated using aluminum alkoxides as raw materials by sol-gel technology.The influence of heat treatment conditions on the size and morphology of nano Al2O3 powders was investigated with the experiments of orthogonal design.The results showed that the effect of heat treatment conditions on the average size and crystal pattern decreased in the sequence of the calcination temperature,the holding time at 300℃and the holding time at the calcination temperature.By controlling heat treatment conditions,spherical γ-Al2O3 powders with desired size,morphology and good dispersion were obtained.To obtain 8 nm spherical γ-Al2O3 powders,the optimal heat treatment conditions are that calcination temperature is 900℃,the holding time at the calcination temperature is 4 h,the holding time at 300℃does not need.