火焰喷雾热解法合成稀土氧化物

Synthesis of Rare Earth Oxides by Flame Spray Pyrolysis

综述了火焰喷雾热解法合成稀土氧化物条件以及产品性能和其应用研究现状,阐述了不同前驱体、火焰温度、停留时间等条件对稀土氧化物粒度、比表面积、相结构、热稳定性等因素的影响,重点介绍了异辛酸稀土作为前驱体或醋酸稀土添加高燃烧焓的有机溶剂合成热稳定性高、比表面积大的纳米稀土氧化物,以及在高火焰温度下合成单斜相稀土氧化物,并对火焰喷雾热解法合成的稀土氧化物应用及未来发展前景进行了展望。

The research status of the conditions of the synthesis of rare earth oxides by flame spray pyrolysis and the per- formance of their products and their applications were reviewed. The effects of the different precursors, flame temperature and residence time on the particle size, specific surfaee area, phase structure and thermal stability of rare earth oxides were de- tailed. The nano rare earth oxides with high thermal stability and large specific surface area were synthesized by rare earth isooetanoate as precursors or the addition of organic solvent with high combustion enthalpy in rare earth acetate. And the mono- clinic rare earth oxides were synthesized at high flame temperatures. The application of rare earth oxide synthesized by flame spray pyrolysis and its future development prospect were prospected.