Fluxes are the glue of the ceramic body. They form a glass with the other components during the firing process and together they form a strong coherent mass.
- Lowers the firing temperature
- Forms a vitreous mass with free silica
- Increases cast rate.
Feldspars have both alkali and alumina content which makes them particularly valuable in industrial processes. Feldspars play an important role as fluxing agents in ceramics and glass production.