激光粒度儀顆粒聚團是怎么回事？
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激光粒度儀顆粒聚團是怎么回事？
What is the particle agglomeration of laser particle size analyzer?
熟悉粒度測試的人會經常聽到一個詞“聚團"，那么什么是聚團呢~顆粒“聚團"是指多個顆粒粘附到一起成為“團粒"的現象。“聚團"的主要原因是顆粒所帶的電荷、水份、范德華力等表面能相互作用的結果。顆粒越細，其表面能越大，“聚團"的機會就越多。
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".
"聚團"一直被視為粒度測試的大敵。因為在通常情況下，粒度分布測試要得到的是顆粒在單體狀態下的分布狀態，因此對于“聚團"現象要進行分散處理。
"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測試都需要分散的，那么哪些測試方法需要分散，哪些方法不需要分散?在這里濟南微納小編給大家講解如下，肯定對你們有幫助的。
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.
在激光粒度儀粒度測試時需要對樣品進行分散的方法有激光法、沉降法、篩分法、電阻法、圖像法等。在粒度測試中不需要對樣品進行分散的方法有費氏法(測平均粒度)、超聲波法、X射線小角散射法等。
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.
為使顆粒處于單體狀態，在進行粒度測試前要對樣品進行分散處理。而不同的測試方法需要有不同的分散方法：濕法粒度測試的分散方法有潤濕、攪拌、超聲波、分散劑等，這些方法往往同時使用。
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.
激光粒度儀干法粒度測試的分散方法是顆粒在高速運動中自身的旋轉、顆粒之間的碰撞、顆粒與器壁之間的碰撞等。
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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2021-09
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