粒度,粉体,粒度分布的区别？

颗粒的大小叫做颗粒的粒度。度量颗粒大小的单位一般用微米或纳米，个别领域也用毫米。在粒度测试中通常用颗粒的直径（粒径）来描述颗粒的粒度。

The size of a particle is called the particle size. A unit of measurement of particle size, usually in microns or nanometers, and millimeters in individual areas. In particle size tests, the particle size (particle size) is usually used to describe the particle size.

由固体颗粒堆积而成的集合体叫粉体。固体颗粒是组成粉体的基本单元。

A collection of solid particles that is called powder. Solid particles constitute the basic unit of powder.

用特定方法测定的不同粒径区间内的颗粒占总量的百分数称为粒度分布。粒度分布有多种基准，如数量分布、长度分布、面积分布、体积分布、重量分布等。激光法的基准是体积分布，沉降法的基准是重量分布，电阻法的基准是数量分布。

The percentage of particles in different size ranges determined by a specific method is called particle size distribution. There are many benchmarks for particle size distribution, such as quantity distribution, length distribution, area distribution, volume distribution, weight distribution and so on. The basis of the laser method is volume distribution. The basis of the sedimentation method is the weight distribution, and the basis of the resistance method is the quantity distribution.

不同基准的粒度分布数值不同，理论上不同基准的粒度分布可以通过数学方法转换，但由于粉体形状千差万别，有时这种转换的误差较大。

The size distribution values of different benchmarks are different. In theory, the particle size distribution of the reference can be converted by mathematical method, but the error of the conversion is greater because of the different shapes of powders.