Biotite Mica Powder from China - Quality Suppliers & Factory for Industrial Applications and Custom Formulations

Biotite mica powder is a premium natural mineral product sourced from high-quality biotite ore in China. This dark-colored mica powder is created through a meticulous process of crushing, grinding, classification, and quality inspection, ensuring top-notch performance for various industrial applications. Biotite, part of the mica mineral family, is renowned for its unique layered silicate structure, exceptional heat resistance, chemical stability, electrical insulation, and its distinct black to dark brown hue. These characteristics make biotite mica powder an ideal choice as an industrial mineral filler and functional additive in coatings, plastics, rubber, ceramics, construction materials, welding materials, and friction products.

In contrast to white muscovite mica powder, biotite mica powder boasts a darker natural color and a higher iron and magnesium content, making it especially suitable for applications that require dark mineral fillers or heat-resistant additives. Its plate-like particle shape enhances barrier properties, dimensional stability, surface texture, and mechanical reinforcement across various industrial systems.

WANCHENG MINERAL, a leading supplier and factory of biotite mica powder in China, offers this versatile product in various mesh sizes and specifications tailored to customer needs. Our biotite mica powder solutions meet the demands of both general industrial applications and personalized formulations, with stringent controls on particle size, color, purity, moisture, and packaging. With a reliable supply of raw materials and extensive experience in mineral processing, WANCHENG MINERAL is your trusted partner for high-quality biotite mica powder.

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Product Details

Chemical Component	Typical Content	Description
SiO₂	35% - 45%	Main silicate component
Al₂O₃	10% - 18%	Aluminosilicate component
Fe₂O₃ + FeO	12% - 28%	Contributes dark color
MgO	8% - 18%	Typical biotite component
K₂O	6% - 10%	Interlayer potassium component
CaO	0.5% - 3%	Minor component
TiO₂	0.5% - 3%	Trace or minor component
Loss on Ignition	1% - 5%	Depends on ore source

Frequently Asked Questions

What is the primary constituent of this mineral?

Silicon Dioxide (SiO₂) is the dominant compound, accounting for 35% to 45% of the total composition as the main silicate backbone.

What gives the mineral its distinctive dark color?

The high concentration of iron oxides (Fe₂O₃ + FeO), ranging from 12% to 28%, is primarily responsible for its dark coloration.

Why is potassium oxide (K₂O) important?

Potassium Oxide (K₂O), typically present at 6% - 10%, serves as an essential interlayer cation that stabilizes the phyllosilicate sheet structure.

What does Loss on Ignition (LOI) indicate?

Loss on Ignition (1% - 5%) reflects the presence of volatile substances, crystal water, or carbonates that escape upon high-temperature heating, dependent on the ore deposit origin.

Are trace elements like TiO₂ and CaO constant?

No, minor and trace oxides such as CaO (0.5% - 3%) and TiO₂ (0.5% - 3%) vary slightly depending on the geological formation and extraction source.

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