Thermally and chemically stable! It is an attractive material with a large aspect ratio.
Mica is a type of layered silicate mineral that has the characteristic of being very thin and easily peelable. It is thermally and chemically stable, and also has excellent electrical insulation properties. Additionally, it is elastic and does not break even when peeled thinly in the plane direction, resulting in a flaky powder with a high aspect ratio when crushed. Yamagucci Mica provides mica powder products as functional materials to enhance the product value for various industrial fields such as plastics, paints, and rubber. 【Features】 ○ Yamaguchi-style wet grinding grade → Achieves high smoothness and particle shape with high aspect ratio in flakes ○ Media mill wet grinding grade → Optimal for mass production using media mill grinding machines ○ Dry grinding grade → Relatively inexpensive with no manufacturing processes such as dehydration and drying ○ Hybrid grinding fine particle grade → Ideal for applications requiring good appearance and addition in thin films For more details, please contact us or download the catalog.
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basic information
**Physical Properties of Mica** ○ Specific Gravity: 2.7–3.0 ○ Hardness: 2.8–3.2 Mohs ○ Elastic Modulus: 1.6–2.1×10⁶ kg/cm² ○ Coefficient of Linear Expansion → Thickness Direction: 15–25×10⁻⁶ /℃ → Plane Direction: 8–9×10⁻⁶ /℃ ○ Specific Heat: 0.21 cal/g・℃ ○ Melting Point: 1,250 ℃ ○ Dehydration Temperature: 550 ℃ (Dehydration temperature of OH contained in the crystal) ○ Volume Resistivity: 10¹⁴–10¹⁵ Ω・cm ○ Relative Permittivity: 7 (at 50–10⁸ Hz) ○ Dielectric Loss: 2–10×10⁻⁴ tanδ (at 50–10⁸ Hz) ○ Dielectric Strength: 25 kV/mm ○ Color Tone: Slightly brown translucent (Appearance of fine powder is white) ○ Refractive Index → n1=1.5993 → n2=1.5944 → n3=1.5612 ● For more details, please contact us or download the catalog.
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Applications/Examples of results
【Applications】 ○Plastic →Improved rigidity, reduced warping, reduced molding shrinkage in both directions, enhanced heat resistance, and added vibration damping, etc. ○Coatings →Corrosion resistance, waterproofing, improved heat resistance, reduced film shrinkage, and added vibration damping, etc. ○Ceramics →Improved fire resistance of building material boards and reduced molding shrinkage, enhanced performance of ceramic release agents, etc. ○Rubber →Increased hardness, improved heat resistance, enhanced performance of release agents and anti-adhesion agents, and added vibration damping, etc. ○Cosmetics →Improved texture, added gloss, prevention of caking in foundation, etc. ○Others →Pearl mica base powder, granular colorants for artificial marble, granular colorants for ceramics and glass, etc. ●For more details, please contact us or download the catalog.
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Company information
Yamaguchi Maika Co., Ltd. was founded in 1951. Since then, we have been manufacturing and selling crushed products of layered minerals, including mica, as well as their processed applications. Our wet grinding products are produced using our original grinding machines developed in-house, which are suitable for grinding layered minerals. Through strict quality control, we have established our products as high-performance and high-quality, which are utilized in various market sectors such as cosmetics, resins, and paints, earning recognition for their value from many customers. Additionally, we not only possess technology to produce a wide range of products that match market needs, such as pelletized mica (micarets), colored mica, and various surface treatments, but we also continuously seek to explore new products and technologies.