微波-超声波协同下合成氧化铈的制备与表征

Preparation and Characterization of the Synthesized Cerium Oxide by Microwave and Ultrasonic

以稀土氯化物溶液为原料,碳铵氢铵作为沉淀剂,在微波和超声波协同及常规加热下制备了氧化铈前驱体并焙烧成氧化铈粉体。研究了超声波功率和陈化时间对氧化铈粉体粒度的影响,样品表征结果:与常规加热相比,单一微波及协同模式制备的氧化铈形貌更规则、粒径更均匀,且微波及超声波制备的更细,分散性最好,控制较短的陈化时间可得到平均粒径在0.2μm左右超细氧化铈。

With rare earth chloride solution as raw material, ammonium bicarbonate as precipitating agent, prepared cerium oxide precursor and calcined into cerium oxide powder in the microwave and ultrasonic and conventional heating conditions. The effects of ultrasonic power and aging time on cerium oxide powder particle size were investigated. The sample characterization results show, compared with conventional heating, the morphology of ceria prepared by single microwave and collaborative model is more rule, particle size is more uniform, moreover the ceria powder prepared by microwave and ultrasonic is more tiny and best dispersion。 The ultrafine cerium oxide powder of average particle size about 0.2 μm can be obtained by controlling shorter aging time.