摘要
以醇铝溶胶-凝胶法制得的水合氧化铝粉为实验原料,通过正交设计,运用(L934)正交表安排热处理实验对水合氧化铝进行热处理,制备具有不同颗粒特性纳米氧化铝粉体,探讨热处理工艺参数对纳米氧化铝颗粒特性的影响规律,优化纳米氧化铝的热处理工艺参数。结果表明:热处理工艺是影响纳米氧化铝颗粒特性的一个重要因素。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、煅烧温度点的保温时间、水合氧化铝300℃分解温度点的保温时间;通过控制其热处理工艺参数,可获得一定尺寸范围内的大小均匀、分散性好的球形γ-Al2O3粉体;制备尺寸为8nm的球形γ-Al2O3粉体的最佳的热处理工艺参数为:煅烧温度900℃,煅烧温度点保温4h,300℃温度点不保温。
Based on sol-gel technology, nano Al2O3 powders with different particle charactedstics were prepared using the hydrous alumina as raw materials after heat treatment, which was synthesized by aluminium alkoxides. The heat treatment conditions were arranged by orthogonal design with a L9（3^4）array. The effect of the heat treatment technology on the particle characteristics of nano Al2O3 powders was ananlyzed. The heat treatmen technology was optimized. The experimental results show that the digressive order of the influence of heat treatment conditions on the average size and pattern is the calcination temperature, the holding time at the calcination temperature and the holding time at 300℃. By controlling heat treatment conditions, spherical γ-Al2O3 powder was fabricated with desired size, morphology and good dispersion. For obtaining 8 nm spherical γ-Al2O3 powder, the optimal calcination temperature is 900℃, soaking 4 hours at that temperature without soaking any time at 300℃.
出处
《陶瓷学报》
CAS
2006年第1期1-5,共5页
Journal of Ceramics
关键词
异丙醇铝
正交实验
煅烧温度
保温时间
aluminum alkoxides, orthogonal design, calcination temperature, holding time
