摘要：采用比表面积和孔径分析仪, 利用颗粒堆积产生的孔隙大小与颗粒粒径之间存在的几何关系, 通过测量纳米颗粒堆积产生的孔隙尺寸, 实现了纳米颗粒粒径的测量。结果表明, 对于粒径在30~70 nm的纳米颗粒, 颗粒堆积产生的介孔尺寸与颗粒粒径之间存在良好的线性关系, 通过工作曲线可快速获得粒径数值。尤其对于粒径小于100 nm的干燥颗粒, 该方法具有良好的适用性, 测量分辨率可达0.2 nm, 测量结果具有统计意义。

关键词：纳米颗粒；粒径测量；比表面积；孔径分析仪

Abstract：The size of nano-particle was measured using surface area and porosity analyzer by means of measuring the stack pore size around the nano-particles. The results showed that there are linear relationship between the stack pore size and the particle size with size from 30 to 70 nm, the results of particle size can be read out precisely form the working curve. Especially for the particles with size small than 100 nm, the measuring accuracy of this method reach to 0.2 nm, and the results have statistical significance.

Keywords: nano-particle；particle size measurement；surface area；porosity analyzer