小粒度氧化镥粉体的制备

Preparation of Small Particle Size Lutetium Oxide Powder

将高纯氧化镥粉体按要求重量溶于盐酸配成氯化镥溶液,草酸铵溶液作为沉淀剂,采用反沉方式,得到草酸镥前驱体,经灼烧得到氧化镥粉体。考察了沉淀剂浓度、溶液pH值、过程反应温度、滴加速度等对沉淀物粒度大小的影响。在最优条件下,该方法可用于制备粉体D50处于1.0~2.0μm之间的氧化镥。所得氧化镥粉体粒度分布均匀,可用做高性能激光晶体的原料。

The high-purity lutetium oxide powder was dissolved in hydrochloric acid to prepare a lutetium chloride solution.Lutetium oxide powder was obtained by calcining the precursor of lutetium oxalate prepared by counter precipitation with the ammonium oxalate solution as a precipitating agent.The effects of the concen-tration of the precipitant,the pH value of the solution,the reaction temperature and the drop rate on the size of the precursor of lutetium oxalate were investigated.Under the optimal condition,lutetium oxide with particle size between 1.0 and 2.0μm could be obtained by this method.As-prepared lutetium oxide powder has a uni-form particle size distribution and can be used as a raw material for high-performance laser crystals.