This feldspar has a higher overall flux content, coupled with a lower iron content.
Formula: 11.3% K2O, 3.2% Na2O,18.5% AI2O, 65.8% SiO2
The name of Feldspar refers to group of Aluminum Silicate of potassium, sodium and calcium. The chief use of Feldspar is in the Ceramic and Glass Industries. Smaller quantities are used in the manufacturing of tiles, whiteware, and sanitaryware.
Potassium feldspar melts at around 1200C (higher than soda feldspar) producing a more a viscous melt than does sodium feldspar. It can also produce a crystalline phase (leucite) that contributes to opacity. Thus, in industry, potash feldspars are often used more for matt glazes while soda feldspar is used for glossy glazes.
Potash feldspar or potassium feldspar find applications as low cost fluxing agent in production of ceramic items i.e. compounding of tiles, sanitary wares, tableware’s, insulators and glazes. Potassium feldspar / Potash feldspar in glass-production, where it supplies the aluminum which enhances the strength / transparency of hollow glass / flat glass and glass wool.
Potash feldspar or Potassium feldspar is used as filler in paints, plasters, insulation etc.
Enamel frits and glazes: Feldspar assists the enamel composition, assuring the absence of defects and the neatness of the end product: e.g. enamel frits, ceramic glazes, ceramic tile glazes, sanitary ware, tableware, electrical porcelain and giftware.
Potash feldspar find applications in paint, mild abrasives, urethane, welding electrodes (production of steel), latex foam, the welding rod coating, & road aggregate.