Basic Information

Structural Information

• Structure Type: Natural hydrated aluminum silicate clay mineral
• Structural Features: Layered silicate crystal structure, composed of tetrahedral silica sheets and octahedral alumina sheets. It has stable chemical property, good plasticity and adsorptive capacity.

Physical & Chemical Properties

• Appearance: White or off-white fine powder
• Odor: Odorless
• Melting Point: 1785 °C
• Density: 2.60–2.63 g/cm3
• pH Value: 5.0–7.0 (aqueous suspension)
• Solubility: Insoluble in water, ethanol and dilute acids; slightly soluble in strong alkalis after high-temperature calcination
• Stability: Chemically inert under normal conditions. Resistant to acid and alkali at room temperature. Dehydrates gradually when heated above 450 °C.

Synthesis & Applications

Production Method

Main Applications

• Ceramic Industry: Main raw material for ceramics, porcelain and refractory materials.
• Paper Industry: Filler and coating pigment to improve paper smoothness and whiteness.
• Coating & Paint: Functional filler for interior and exterior paints, enhancing coverage and suspension performance.
• Cosmetics & Pharmaceuticals: Used as thickener, adsorbent and excipient in creams, powders and oral preparations.
• Rubber & Plastic: Reinforcing filler to improve product rigidity and wear resistance.

Safety & Storage Instructions

• Hazard Classification: Low toxicity; dust may irritate respiratory tract.
• Personal Protection: Wear dust mask and ordinary gloves during operation, avoid long-term inhalation of dust.
• Storage Condition: Keep containers tightly sealed. Store in cool, dry and ventilated area, prevent moisture and contamination.
• Transportation: Classified as general goods. Prevent package breakage and dust leakage during transit.

Quality & Spectral Data

• Al2O3 Content: 36.0–38.0%
• SiO2 Content: 45.0–48.0%
• Loss on Ignition: 12.0–14.0%
• Whiteness: ≥85%
• Residue on Sieve (325 mesh): ≤0.5%

Information Summary Table