Deflocculation is a chemical process that consists of adding an electrolyte, such as sodium silicate, sodium carbonate or soda ash, to a slip or slurry in order to disperse the clay particles uniformly. This process reduces the attraction between the particles, increasing the fluidity of the mixture without the need to add more water. The result is a more fluid and workable slip, but with a lower water content, which is essential to minimize shrinkage and risks of deformation during drying and firing.
This method is crucial in processes such as casting, where a homogeneous, well-suspended slip that flows easily is required to fill the molds evenly. By reducing the water content, deflocculation also accelerates drying, reduces the risk of air bubble formation and prevents particle settling, ensuring superior quality in finished parts.
Interesting Fact
The deflocculation process can be influenced by factors such as temperature. A change in temperature can alter the effectiveness of the deflocculant, causing the mixture to become thicker or more fluid than expected.
Helpful Tip
If you notice that your slip is too thick, adjust the amount of deflocculant to improve its flowability without adding more water, which could cause cracks as it dries.
