Agglomeration in tungsten oxide dispersion may be caused by the following factors:
- Van der Waals attraction: There is a van der Waals force on the surface of tungsten oxide particles, which is a kind of attraction. When the van der Waals force between particles is strong, they will attract each other and gather together to form clusters.
- Electrostatic attraction and repulsion: The surface of tungsten oxide particles is charged, and according to the nature of the charge between the particles, there may be electrostatic attraction or electrostatic repulsion between them. When the electrostatic attraction force is large or the electrostatic repulsion force is small, the particles are more likely to aggregate with each other.
- Solvent properties: The properties of the solvent have an important influence on the dispersion of the particles. Certain solvents may interact with tungsten oxide particles, causing particle aggregation. The polarity of the solvent, surface tension, and interaction with the particle surface all affect the stability of the dispersion.
- Effect of coating agent or additive: When preparing tungsten oxide dispersion, coating agent or additive may be used to improve dispersion and stability. However, the nature and concentration of these coating agents or additives may affect the interaction between particles, leading to agglomeration phenomenon.
The occurrence of agglomeration will reduce the stability and uniformity of the dispersion, which may affect the performance and application of the dispersion. In order to avoid or reduce agglomeration, appropriate measures can be taken, such as selecting a suitable dispersant, optimizing the choice of solvent, controlling the pH value of the solution, adjusting the use of coating agents or additives, etc. These measures help to improve the dispersibility and stability of the tungsten oxide dispersion and maintain the uniform dispersion state of the particles.
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