Calcined Kaolin
Calcined
Kaolin
An anhydrous aluminosilicate produced by refining and calcining natural kaolin at high temperatures (450°C–1050°C), removing structural water and organic impurities for superior whiteness, opacity, and chemical stability.
Explore Applications
High Whiteness
Excellent opacity
Low Oil Absorption
High loading capacity
Chemical Inertness
Electrical insulation
High-Purity Calcined Kaolin for Superior Opacity
Calcined Kaolin is an anhydrous aluminosilicate product produced by refining and calcining natural kaolin at high temperatures (typically between 450°C and 1050°C), which removes its structural water and organic impurities. This process destroys the crystal structure of kaolin, transforming it into an amorphous or mullite-phase product with higher chemical stability and reactivity.
- Exceptional whiteness & hiding power
- Low oil absorption for high filler loading
- Chemically inert with excellent electrical insulation
- Effective TiO₂ extender in coatings & paints
Key Product Advantages
High-temperature calcination delivers a unique combination of optical, chemical, and functional properties.
High Whiteness & Opacity
Calcination removes impurities, significantly increasing product whiteness. The resulting porous structure scatters light effectively, providing excellent opacity.
Low Oil Absorption
Compared to water-washed kaolin, kaolin calcined at appropriate temperatures has lower oil absorption, facilitating high loading in coatings and plastics.
Chemical Inertness & Insulation
After calcination, it becomes highly chemically stable, resistant to acids and alkalis, and exhibits excellent electrical insulation properties.
Abrasion Resistance & Porosity
Its hardness and thus abrasion resistance increase. The microporous structure formed can be functional in certain applications.
Enhanced Opacifying Agent
In coatings and paints, it serves as an effective extender/spacer for titanium dioxide (TiO₂), enhancing hiding power through light scattering.
Where Calcined Kaolin Is Used
A versatile functional filler across coatings, plastics, paper, and advanced industrial applications.
Paints & Coatings
Primarily used in latex paints to deliver excellent dry hide, scrub resistance, and suspension properties.
Plastics & Rubber
Used in wire and cable insulation materials (PE, PVC) as a functional filler enhancing insulation and mechanical properties.
Paper Industry
Serves as a pigment for high-grade coated paper and art paper, improving whiteness, smoothness, opacity, and printability.
Functional Filler
Employed in fields such as adhesives, sealants, ceramics, and catalyst carriers.
Others
Used in fiberglass, refractory materials, and other high-temperature industrial applications.
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