A flux is any material that lowers the melting temperature of a ceramic mixture, enabling glass phase formation at temperatures achievable in industrial kilns (1050-1250 degrees C).
Technical Details
Without flux, the primary ceramic raw materials (clay and quartz) would require temperatures above 1600 degrees C to vitrify — impractical for commercial production. The flux provides alkali or alkaline earth oxides that disrupt the strong Si-O-Si bonds in the silicate network, creating a liquid glass phase that fills porosity, bonds particles together, and creates the dense strong body that characterizes fired ceramics. Common flux materials include: nepheline syenite (Na2O+K2O flux — our products), potassium feldspar (K2O flux — our SY101), sodium feldspar (Na2O flux), talc (MgO flux), wollastonite (CaO flux), and various frits (pre-melted glass). Among these, nepheline syenite provides the highest concentration of flux per ton (14-16% total alkali) — meaning it does more work per kilogram in your formulation than any other single natural flux material. This efficiency translates to lower material consumption, lower firing temperature, and lower total production cost. See our detailed flux selection guide for application-specific recommendations..
Practical Application
