顆粒的大小叫做顆粒的粒度。度量顆粒大小的單位一般用微米或納米，個(gè)別領(lǐng)域也用毫米。在粒度測(cè)試中通常用顆粒的直徑（粒徑）來(lái)描述顆粒的粒度。
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.
由固體顆粒堆積而成的集合體叫粉體。固體顆粒是組成粉體的基本單元。
A collection of solid particles that is called powder. Solid particles constitute the basic unit of powder.
用特定方法測(cè)定的不同粒徑區(qū)間內(nèi)的顆粒占總量的百分?jǐn)?shù)稱為粒度分布。粒度分布有多種基準(zhǔn)，如數(shù)量分布、長(zhǎng)度分布、面積分布、體積分布、重量分布等。激光法的基準(zhǔn)是體積分布，沉降法的基準(zhǔn)是重量分布，電阻法的基準(zhǔn)是數(shù)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.
不同基準(zhǔn)的粒度分布數(shù)值不同，理論上不同基準(zhǔn)的粒度分布可以通過(guò)數(shù)學(xué)方法轉(zhuǎn)換，但由于粉體形狀千差萬(wàn)別，有時(shí)這種轉(zhuǎn)換的誤差較大。
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.
