小颗粒氧化铈的制备与表征分析

Preparation and characterization of small particles of cerium oxide

颗粒小于1.0微米的氧化铈,具有广泛之应用价值,在诸多制程中以沉淀法成本最低且易于量产操作,极具商业开发之潜力。常规方法沉淀,质量低、过程复杂、成本高。本研究在实验室以农用碳酸氢铵和双氧水作为为沉淀剂制备碳酸铈,通过灼烧生产氧化铈,研究中改变双氧水加入之时间点、双氧水浓度、反应温度及铈前驱盐价数等制备变因,探讨其对所得氧化铈晶粒大小、形状、晶态、比表面积及催化活性等性质的影响。

Cerium oxide with a particle size of less than 1 microns has a wide range of applications. In many processes, precipitation has the lowest cost and is easy to operate in mass production. It has the potential of commercial development. The conventional method has the advantages of low quality, complicated process and high cost. The research in the laboratory with agricultural ammonium bicarbonate and hydrogen peroxide as the preparation of cerium carbonate as precipitator, burning through the production of cerium oxide, hydrogen peroxide, change the time point of research in the concentration of hydrogen peroxide, reaction temperature and cerium precursor salts valence preparation because of the cerium oxide grain size, shape, effect of surface area, crystalline properties and catalytic activity.