Potash Feldspar

Potash Feldspar

Geology of potassium feldspar> K-par range of Potash Feldspars from our various geological mineral deposits is natural alumina silicates. They are enriched with a variety of physical and chemical properties. Their fusibility /purity make them especially suitable constituents for different ceramic and industrial applications.


  • Particle size, packaging & deliveries: Potash feldspar powders are available in 100,150,200,250,325 etc meshes & in .20 and 10 um particles. Potassium Feldspar is packed in new/used HDPE/PP laminated / unlaminated 50 kg bags.
  • (For exports, packaging in 50kg, 1000kg, 1250kg, 1400kg laminated bags duly palletized, shrink wrapped is offered in general for feldspar. FIBC packaging is also available.)

  • Customized packaging according to customer is also available.
Chemical compositions and physical properties Grade wise mass%
Constituents K-Par Glaze 325 K-Par GlazeLS 300 K-Par Vitro K-Par Sanitary K-Par Floor K-Par 66 K-Par wall
SiO2 66.81 66.63 66-70 72.99 70-72 69.13 74.73
Al2O3 17.88 18.17 15-17 14.67 15-16 16.87 14.51
TiO2 00.02 0.04 -- 00.04 00.09 00.05 00.04
CaO 00.15 00.16 00.13 00.51 -- 00.16 00.46
MgO 00.90 00.14 00.17 00.40 -- 00.18 00.30
K2O 11.26 12.53 08.00 07.86 06-8.5 06.43 04.05
Na2O 03.28 1.87 02-4.2 03.14 2-4 06.18 04.76
Fe2O3 00.04 00.09 00.20 00.20 00.20 00.12 00.29
L.O.I. 00.28 00.30 00.50 00.43 00.50 00.69 00.55
Unfired properties Brightness 91.2 86.60 -- -- -- -- --
Whiteness 93 89.80 -- -- -- -- --
Oil absorption ML/100gm 24 24.5 -- -- -- -- --
Specific gravity 2.45 2.36 -- -- -- -- --
Bulk density-gm/cc 1.25 1.19 -- -- -- -- --
Fired properties @1210’C (30 inures) Clear Melt L value:96.8 Clear melt White Melt Creamy White Creamy white melt Creamy melt Dirty melt
Applications Insulators, Glazes, frits, paints, plastics, sanitary wares Vitrified tiles, glazes, frits, table wares, insulators, porcelain Sanitary ware, table wares, insulators, porcelain, welding rod refractory Floor & fall tile Wall, floor tiles, glass Wall, floor tile Wall, floor tile

Applications, usage and industries served:

Principally alkali and alumina contents of feldspar makes it interesting mineral Feldspar is available in Feldspathic sand, Pegmatite and pure Feldspar forms. Further distinction can be made between sodium, potassium and mixed feldspars, depending on the type of alkali they contain. Feldspars play an important role as fluxing agents in ceramics and glass applications, and also are used as functional fillers in the paint, plastic, rubber and adhesive industries.

Potash, Sodium Feldspar for Ceramics: Feldspar does not have a strict melting point, since it melts gradually over a range of temperatures. This greatly facilitates the melting of quartz and clays and, through appropriate mixing, allows modulations of this important step of ceramic making. Feldspars are used as fluxing agents to form a glassy phase at low temperatures and as a source of alkalis and alumina in glazes. They improve the strength, toughness, and durability of the ceramic body, and cement the crystalline phase of other ingredients, softening, melting and wetting other batch constituents. Potash Feldspar is treated an important ingredient of high-tension insulators.

Potash and Sodium feldspar fillers are also are used as fillers and extenders in applications such as paints, plastics and rubber. Beneficial properties of feldspars include good dispensability, high chemical inertness, stable pH, high resistance to abrasion, low viscosity at high filler loading, interesting refractive index and resistance to frosting. The products used in such applications are generally fine-milled grades.

Sodium Feldspar, Potash Feldspar for ceramic flooring sector, feldspar is the main constituent in the body composition. It is used as a flux, lowering the vitrifying temperature of a ceramic body during firing and forming a glassy phase. Surface tension pulls the remaining solid particles together, giving a densification of the ceramic body. With rising temperatures, the alkalis become more active and first dissolve the clay particles and then the free silica.

Potash feldspar, Sodium Feldspar for Tableware: Potash feldspar gives a good fusibility for a product without defects.

Potash Feldspar for sanitary ware: The use of potassium feldspar within vitreous ceramic bodies facilitates the optimization process.

Important notice regarding this information Feldspar is a naturally occurring raw material & its composition mentioned above is expected to vary the statements and technical information contained in this document is based on our research and research of others. However, this document is not contractual, and nothing in it, constitutes a warranty (expressed or implied) that the goods described are accurate and fit for a particular purpose of the customer. Purchasers are advised to make their own tests to determine the suitability of offered materials before placing order and also well before consuming. This specification supersedes any former publication and is subject to change without notice.