Kaolin
A naturally occurring soft white clay mineral used as a filler, coating agent, and functional additive in automotive components.
Overview
Kaolin (hydrated aluminium silicate, Al₂Si₂O₅(OH)₄) is a fine, white mineral clay mined primarily in regions such as the UK, USA, Brazil, and China. In automotive manufacturing, kaolin is widely used as a functional filler in rubber compounds, plastics, and coatings, improving stiffness, dimensional stability, and thermal resistance. Its platelet particle structure enhances barrier properties in under-body coatings and wire insulation. Calcined kaolin is also used in catalytic systems and ceramic brake components.
Automotive Applications
Similar Materials
Zirconium
Refractory Metal
Zirconium is a lustrous, silver-grey transition metal known for its exceptional corrosion resistance and high melting point. In the automotive industry, it is utilized both as a pure metal for specialized coatings and in the form of zirconium dioxide for high-performance ceramic components.
Antimony
Metalloid
A lustrous, brittle grey metalloid primarily used as an alloying agent to harden lead and as a chemical synergist in flame retardants.
Functional Coatings (Anti-Corrosion, Anti-Scratch, Thermal Barrier)
Functional Surface Coating
A broad category of engineered surface treatments providing specific performance functions including corrosion protection, scratch resistance, and thermal barrier properties.
Barite (Barium Sulphate)
Mineral Filler
Barite is a naturally occurring mineral composed of barium sulfate (BaSO4) that is primarily used as a high-density filler and weighting agent.
Properties
Category
Type
Aluminium Silicate Clay
Available Colors
Available Forms
Key Properties
- High brightness and whiteness
- Chemically inert
- Low electrical conductivity
- Good thermal resistance
- Platelet particle structure
- Improves dimensional stability
Technical Specifications
Density
2.58–2.63 g/cm³
Temperature Resistance
Up to 1,800°C (calcined grade)
Sustainability
Sustainability Rating
Kaolin is an abundant natural mineral with relatively low energy extraction requirements. Spent kaolin from catalytic applications can be partially reclaimed.