纳米级ZrO_2粉料的表征

CHARACTERIZATION OF NANO-SIZED ZrO_2 POWDER

用共沉淀的方法制备得到了纳米级ZrO_2粉料,并表征了其化学、结构和物理性质。X射线荧光光谱法和原子光谱法测定化学主成份和杂质含量。粉料的物理性质表征包括一次颗粒(及晶粒)尺寸及其分布,团聚体尺寸及其分布,气孔率及气孔分布的测定,以及它们与煅烧温度的关系。一次颗粒及晶粒尺寸的观察和测定方法包括透射电镜(TEM)、X射线线宽(XRD-LB)、比表面积(BET)和X射线小角散射(SAXS)法,其中SAXS法用于纳米级ZrO_2粉料颗粒尺寸分布的测定。用压汞法表征了粉料的气孔率、气孔尺寸分布。

Nano-sized ZrO_2 powder was prepared by coprecipitation method and its chemical, structural and physical properties were characterized. X-ray fluorescence spectroscopy and atomic spectroscopy were adopted for the determination of the main components and impurity content. The physical property characterization includes the determination of primary particle (and grain) size and its distribution, agglomerate size and its distribution, and the porosity and pore size distribution. TEM, XRD-LB (X-ray diffraction-line broadening), specific surface area (BET method) and SAXS (small angle X-ray scattering) techniques were employed for the observation and measurement of primary particle and grain size, and SAXS was used for the determination of the primary particle size distribution of the nano-sized powder. The porosity, pore size distribution were measured by Hgporosimetry.