Sodium hexametaphosphate is a chemical compound widely used in ceramics as a dispersant, especially in the preparation of slip and glazes. Its main function is to improve the fluidity of mixtures, facilitating the suspension of solid particles in liquids. By preventing agglomeration of the particles, sodium hexametaphosphate ensures that they remain evenly distributed in the mixture, allowing for a more uniform application of glazes on ceramic pieces and ensuring that slip flows consistently without risk of sedimentation. This is crucial for the aesthetic quality and consistency of ceramic finishes, as it prevents the formation of bubbles, lumps or uneven lines on the surface of the glazes.
One of the most prominent applications of sodium hexametaphosphate in ceramics is in the slip casting technique, where liquid slip needs to be poured into plaster molds. In this process, the fluidity of the mixture is essential to ensure that the liquid is evenly distributed within the mold without any separation or lumps forming. Sodium hexametaphosphate facilitates the smooth flow of the slip, ensuring that no streaks or defects occur on the walls of the parts.
Interesting Fact
Sodium hexametaphosphate is not only used in ceramics, but also in the food industry, where it is added to certain products to prevent agglomeration of powdered ingredients.
Helpful Tip
Add small amounts of sodium hexametaphosphate to your slips to prevent particles from settling to the bottom of the container. It is important not to overdo it, as too much can make the mixture too fluid and difficult to control.
