Potassium feldspar is one of the most important silicate minerals and serves as a primary source of potassium in various industries. Due to its relatively low melting point, it plays a key role in lowering firing temperatures and improving the quality of ceramic, tile, and porcelain products. In glassmaking, it is used as a flux and as a source of potassium and aluminium. Its chemical stability, light colour, and uniform composition make potassium feldspar an ideal choice for enhancing both the technical properties and the visual appearance of industrial products.
Potassium feldspar is an abundant mineral, mainly found in igneous rocks such as granite. It appears in a range of colours from white and cream to pink, giving it a distinctive look. Thanks to its stable crystal structure and chemical composition, it serves not only as a flux in the ceramics and glass industries but also as a valuable filler in the production of paints, plastics, and rubber. These applications enhance physical properties such as hardness, wear resistance, and durability, significantly improving the final quality of the products.
Feldspars are mainly classified into two groups: sodium (sodic) feldspar and potassium (potassic) feldspar, each with distinct properties and applications. Sodium feldspar, with a relatively low melting point around 1150 °C, low viscosity, and favourable processing characteristics, is primarily used in the production of various types of glass and certain industrial products. In contrast, potassic feldspar plays a crucial role as a flux and a main component in ceramic formulations, making it more widely used and economically valuable than sodic feldspar.
Overall, approximately 65% of alkali feldspars are consumed in the glass industry, 30% in ceramic production, and about 5% in fillers and other applications. In glassmaking, feldspar serves as an important source of aluminium and sodium, while in tiles, porcelain, and other ceramic products, it enhances strength, transparency, and overall quality of the final product.
Potassium feldspar, with its relatively low melting point and effective role as a flux, helps improve quality and reduce firing temperatures in industrial processes. This feature enhances the transparency, appearance, and strength of ceramic and porcelain products, increasing production efficiency. Its thermal stability and balanced chemical composition make potassium feldspar an excellent choice for the ceramics, tile, and glass industries.
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| P₂O₅ | MnO | LOI | S | K₂O | Na₂O | MgO | CaO | TiO₂ | Fe₂O₃ | Al₂O₃ | SiO₂ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.16 | <0.01 | 0.33 | <0.01 | 10.52 | 1.84 | 0.01 | 0.09 | <0.01 | 0.01 | 15.31 | 71.70 |
