Feldspar
With natural alkali content, high hardness, and superior fluxing behaviour, Feldspar promotes melting, vitrification, and surface smoothness across ceramic bodies, glazes, glass melts, and coatings.
Product Overview: High-Purity Industrial Feldspar
Feldspar is a naturally occurring alumino-silicate mineral characterized by its rich alkali content (K₂O / Na₂O), moderate hardness (Mohs 6–6.5), and exceptional fluxing behavior. It serves as an essential raw material in ceramic whiteware, vitreous tiles, sanitaryware, glass manufacturing, and functional coating formulations.
During kiln firing, Sakthima Feldspar acts as a powerful flux that lowers the melting temperature of silica and clay bodies, accelerating vitrification and liquid phase formation. This results in dense, mechanically robust, and non-porous ceramic bodies with refined surface aesthetics. In glass melts, it provides essential alumina (Al₂O₃) that boosts chemical durability, thermal shock resistance, and mechanical stability.
Key Benefits
Effective Fluxing Action
Supports lower melting and firing temperatures, reducing kiln energy requirements.
Good Hardness
Contributes to surface durability, scratch resistance, and glaze longevity.
Controlled Mineral Composition
Ensures consistent alkali (K₂O/Na₂O) ratios and stable firing performance.
Improved Vitrification
Promotes liquid-phase sintering and densification during ceramic firing.
Good Chemical Stability
Maintains reliable durability, acid resistance, and thermal stability in glass melts.
Surface Finish Support
Contributes to brilliant gloss, smoothness, and visual uniformity in glazes.
Applications
Ceramics & Sanitaryware
Vitrified Tiles & Tableware
Glass & Glassware
Paints, Coatings & Polymers
Available Grades
Standard Grade
Premium Grade
High Whiteness Grade
Custom Grade
Technical Specifications
| Parameter | Standard | Premium | High Whiteness |
|---|---|---|---|
| Silica (SiO₂) | 65 – 68 | 66 – 70 | 68 – 73 |
| Alumina (Al₂O₃) | 17 – 18 | 17 – 18.5 | 18 – 19 |
| Potash (K₂O) | 3 – 5 | 4 – 6 | 4 – 6 |
| Soda (Na₂O) | 2 – 4 | 2 – 3.5 | 2 – 3 |
| Iron (Fe₂O₃) | ≤ 0.3 | ≤ 0.3 | ≤ 0.2 |
| Whiteness (L*) | 60 – 72 | 72 – 76 | 75 – 80 |
| Mesh Size | 200 / 325 | 200 / 325 | 200 / 325 |
Why Choose Us?
Strict Low-Iron Sorting
Selectively mined and optically sorted to guarantee Fe₂O₃ < 0.1% for bright white firing color.
Potash & Soda Variants
Supplied in high-potash (Orthoclase) and soda (Albite) grades to match client thermal curves.
Controlled Micronization
Milled in high-efficiency ceramic-lined ball mills from 100 to 400 mesh with zero metal contamination.
Reliable Bulk Supply
Prompt dispatches in 50 kg HDPE bags and 1 MT jumbo bags with guaranteed delivery schedules.