稀土粉体性能的评价体系(Ⅰ)：晶粒与表面特性的评价

稀土粉体(氢氧化稀土、稀土碳酸盐、稀土草酸盐、稀土氧化物和氟化物等)的颗粒性能方面的指标对稀土新材料的开发具有重要意义。晶粒特性、表面特性、颗粒特性、颗粒群特性和应用特性等五方面构成了稀土粉体性能的评价体系。本文对晶粒特性和表面的评价进行了讨论。晶粒大小和晶体结构是描述晶粒特性的两个指标，比表面积、表面电位、比表面能和表面亲和性是描述表面特性的四个指标。

Characterization System ofRare Earth Compound Powders (

The characterization of rare earth compound powders,such as rare earth hydroxides,rare earth carbonates,rare earth oxalates and rare earth oxides,are important to the synthesis of rare earth new materials.The rare earth compound powder characterization system comprises properties of crystal,surface,particle,powder and usage.Properties of crystalline and surface,such as crystal size distribution,crystal structure,specific surface area,surface potential and specific surface energy are discussed in the paper.