Silica sand is a natural material composed mainly of silicon dioxide (SiO₂), which appears in the form of quartz grains. In ceramics, it is widely used as a defatting agent in clay mixtures, where its inclusion reduces plasticity, reducing the risk of deformation during drying and firing. In addition, silica sand is an essential source of silica in clays and glazes, favoring vitrification by forming a vitreous structure that increases the strength and durability of ceramic pieces.
In glazes, its particle size can vary to influence the surface finish. Finer particles produce smooth and shiny glazes, while coarser particles generate matte or rough textures, ideal for decorative effects. Silica sand is also used in the manufacture of refractory materials and kiln supports due to its high thermal resistance.
Interesting Fact
In traditional ceramics, silica sand was extracted locally from rivers and quarries, being an essential material in cultures such as Egyptian and Mesopotamian for the production of glass, glazes and glazed ceramics. Its use was fundamental in the creation of the first ceramic pieces decorated with glazes.
Helpful Tip
Always use sieved silica sand to avoid impurities and ensure uniform mixing. Work in a ventilated area and wear a dust mask to protect yourself from dust, as it can be harmful to health if inhaled repeatedly.
