激光粒度仪颗粒聚团是怎么回事？
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激光粒度仪颗粒聚团是怎么回事？
What is the particle agglomeration of laser particle size analyzer?
熟悉粒度测试的人会经常听到一个词“聚团"，那么什么是聚团呢~颗粒“聚团"是指多个颗粒粘附到一起成为“团粒"的现象。“聚团"的主要原因是颗粒所带的电荷、水份、范德华力等表面能相互作用的结果。颗粒越细，其表面能越大，“聚团"的机会就越多。
People familiar with particle size testing often hear a word "agglomerate", so what is "agglomerate"? Particle "agglomerate" means that many particles stick together to become "aggregate" phenomenon. The main reason for the aggregation is the interaction of surface energy, such as charge, moisture, and van Edward force. The finer the particle, the greater the surface energy, the more opportunities for "agglomerate".
"聚团"一直被视为粒度测试的大敌。因为在通常情况下，粒度分布测试要得到的是颗粒在单体状态下的分布状态，因此对于“聚团"现象要进行分散处理。
"Agglomeration" has long been regarded as an enemy of particle size testing. Because in normal circumstances, particle size distribution test is to obtain the distribution of particles in the monomer state, so the phenomenon of "agglomerate" should be dispersed.
但是并不是所有的粒度测试都需要分散的，那么哪些测试方法需要分散，哪些方法不需要分散?在这里济南微纳小编给大家讲解如下，肯定对你们有帮助的。
But not all size tests require dispersed, so what test methods need to disperse, what method does not need to disperse? Here in Ji'nan small micro series to explain to you the following, you certainly to help.
在激光粒度仪粒度测试时需要对样品进行分散的方法有激光法、沉降法、筛分法、电阻法、图像法等。在粒度测试中不需要对样品进行分散的方法有费氏法(测平均粒度)、超声波法、X射线小角散射法等。
In the particle size measurement of laser particle sizer, we need to disperse the samples, such as laser method, sedimentation method, sieving method, resistivity method, image method, etc.. The size test does not need to sample dispersion method with Fisher method (average particle size), ultrasonic method, small angle X ray scattering method.
为使颗粒处于单体状态，在进行粒度测试前要对样品进行分散处理。而不同的测试方法需要有不同的分散方法：湿法粒度测试的分散方法有润湿、搅拌、超声波、分散剂等，这些方法往往同时使用。
In order to keep the particles in a monomeric state, the sample should be dispersed before the particle size test is carried out. Different testing methods need different dispersion methods: wet method of particle size distribution, wetting, mixing, ultrasonic, dispersant, etc. these methods are often used simultaneously.
激光粒度仪干法粒度测试的分散方法是颗粒在高速运动中自身的旋转、颗粒之间的碰撞、颗粒与器壁之间的碰撞等。
The dispersion method of particle size test for Laser Particle Sizer is the self rotation of particles in high speed motion, the collision between particles, and the collision between particles and the wall.
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