China Sericite Mica Powder Suppliers - High-Quality Mineral Fillers from a Trusted Factory

Sericite mica powder is a premium, fine-grained mica mineral renowned for its naturally soft texture, smooth surface feel, high whiteness, and outstanding chemical stability. As a leading functional mineral filler, sericite holds significant value in various industries due to its fine particle size, layered crystal structure, low hardness, excellent dispersion capabilities, and broad compatibility with industrial formulations. Compared to ordinary coarse mica powder, sericite powder provides a superior smooth finish, enhanced coating appearance, and uniform dispersion, making it an ideal choice for paints, plastics, cosmetics, rubber, ceramics, and more.

The unique mineral structure of sericite endows it with impressive lamellar properties. These thin layered particles significantly enhance barrier performance, suspension stability, dimensional stability, and surface smoothness across different formulations. In the coatings industry, sericite mica powder boosts smoothness, weather resistance, anti-cracking properties, and decorative appeal. For plastics and rubber applications, it serves as a functional filler that improves dimensional stability, minimizes shrinkage, and elevates mechanical performance. In cosmetics, carefully selected sericite powder is cherished for its silky texture and pleasant skin feel.

WANCHENG MINERAL, a leading supplier and factory of sericite mica powder in China, caters to global industrial customers, distributors, and formulation manufacturers. We prioritize stable raw material selection, precise grinding and particle size classification, stringent quality inspections, and export-grade packaging. Our mission is to deliver consistent sericite powder solutions tailored for those seeking reliable mineral fillers for coatings, paints, plastics, cosmetics, rubber, ceramics, and other applications.

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Product Details

Primary Oxide

45% - 55%

SiO₂ (Main Silicate Component)

Alumina Content

25% - 35%

Al₂O₃ (Main Alumina Component)

Alkali Content

6% - 10%

K₂O (Typical Mica Alkali)

Chemical Composition Breakdown

Chemical Component	Typical Content	Description
SiO₂	45% - 55%	Main silicate component
Al₂O₃	25% - 35%	Main alumina component
K₂O	6% - 10%	Typical mica alkali component
Fe₂O₃	0.5% - 3.0%	Affects whiteness and color
MgO	0.5% - 3.0%	Minor component
CaO	≤ 2.0%	Minor component
Na₂O	≤ 1.5%	Minor alkali component
Loss on Ignition	3% - 6%	Depends on ore and processing

Frequently Asked Questions

What is the dominant chemical compound in this material?

Silicon dioxide (SiO₂) is the dominant compound, accounting for 45% to 55% of the total chemical profile, followed by aluminum oxide (Al₂O₃) at 25% to 35%.

How does the Fe₂O₃ content influence the end product?

Iron oxide (Fe₂O₃) directly affects the whiteness and overall coloration of the material. Keeping its concentration between 0.5% and 3.0% ensures stable aesthetic properties.

Why is potassium oxide (K₂O) significant in mica composition?

Potassium oxide (K₂O) typically ranges between 6% and 10% and serves as the primary interlayer cation, characteristic of the mineral's stable layered silicate matrix.

What does the Loss on Ignition (LOI) value represent?

The Loss on Ignition value (3% to 6%) indicates the loss of volatile substances, primarily structural water and organic traces, when subjected to elevated temperatures during testing.

What are the limits for minor oxides like CaO and Na₂O?

Calcium oxide (CaO) is maintained at ≤ 2.0% and sodium oxide (Na₂O) at ≤ 1.5%, representing minor trace elements that do not alter the bulk mineral characteristics.

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