测定粉末粒度的方法甚多。本文介绍了光透法测定粒度分布,首先阐述了组成该测试分法的二个十分重要的原理。沉降原理和消光原理。 沉降原理系根据Storeo定理,即粉末颗粒于粘性介质中在重力作用下球状颗粒的沉降速度与球径二次平方成正比。 There are many ways to determine the particle size of a powder. This article describes the particle size distribution measured by light penetration. First, we describe two very important principles that make up the test. Sedimentation principle and extinction principle. Settling principle is based on the Storeo’s theorem, that is, the settling velocity of the spherical particles in the viscous medium under the action of gravity is proportional to the square root of the sphere diameter.