Explanation

In powder, a certain number of primary particles often form larger particles through surface tension or solid bond bridging, that is, agglomerates. This phenomenon of powder particle gathering into clusters is called agglomeration. The type of agglomeration can be divided into two forms according to the nature of the force: hard closed agglomeration and soft agglomeration. Hard agglomeration generally refers to the agglomeration formed by the connection between particles through strong forces such as chemical bonding force or hydrogen bond force. This kind of aggregate has large internal force, tight combination between particles, and is not easy to re disperse. The activity of the powder is poor, and the sintering performance is poor. This hard agglomeration should be avoided as far as possible during the preparation of nano powder materials. Soft agglomeration generally refers to the agglomeration produced by the connection between particles through the force between molecules and the capillary tube force between particles. The internal force of this aggregate is relatively small, the powder is relatively porosity, and it is easier to re disperse.

Classification