醇盐水解直接干燥法制备镁铝尖晶石粉体的研究

Preparation of Magnesium Aluminum Spinel Powders by Alkoxide Hydrolysis Direct Drying Method

以镁粉、铝粉和异丙醇为原料,三氯化铝为催化剂,采用醇盐水解直接干燥法成功制备了镁铝尖晶石粉体,利用XRD、SEM、激光粒度分析仪对样品的结构、形貌进行了表征。结果表明:该方法合成工艺简单、快速,原料便宜易得,在水解比例分别为1∶100和1∶200,煅烧温度为1100℃,煅烧时间为1 h时,所得产物粒子形状基本为球形,粒径集中在60~70μm之间,只有少数粒径达到纳米级,颗粒分散性还不够好,需严格控制煅烧温度及干燥过程。

With magnesium, aluminum and isopropyl alcohol as raw materials, aluminum chloride as catalyst, spinel powders were successfully prepared by alkoxide hydrolysis direct drying method. By using XRD, SEM, laser particle size analyzer, samples structure and morphology were characterized. The results showed that: the synthesis method is simple, rapid, inexpensive and easy to get raw materials.When the hydrolysis ratio is 1 ∶ 100 and 1 ∶ 200, the calcination temperature is 1100 ℃, and the calcination time is 1h, the resulting product is a substantially spherical particle shape and particle size concentrate on 60 ~ 70 μm, with only a few nanometer particle size.Besides, particle dispersion is not good enough. The calcination temperature and the drying process should be controlled strictly.