Potassium Feldspar Ceramic Flux
CAS Number: 68476-25-5
Potassium feldspar (K-feldspar, KAlSi3O8) is the primary fluxing agent in porcelain, bone china, and vitreous sanitary ware ceramic bodies. During firing, feldspar melts at 1150–1250 °C to form a viscous glass that cements the ceramic grains and provides translucency and mechanical strength. The K2O/Na2O ratio determines glass viscosity and firing range.
Technical Specifications
| appearance | White to light grey fine powder |
| purity (%) | ≥95 |
| K2O content (%) | 11–14 |
| SiO2 content (%) | 63–66 |
| Al2O3 content (%) | 18–20 |
Applications
- Primary flux in porcelain and fine china ceramic bodies
- Flux in sanitary ware and electrical insulator ceramics
- Glaze raw material for matte and glossy ceramic glazes
- Glass batch component in borosilicate glass production
- Filler and flux in vitreous enamel formulations
Key Features
- Key flux enabling vitrification at conventional porcelain firing temperatures
- Wide firing range reduces sensitivity to kiln temperature variations
- Contributes to translucency and whiteness in fine ceramics
- Consistent chemical composition from well-characterized deposits
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CAS Number
68476-25-5
Category
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