Biotite, often referred to as black mica, is another common type of mica. Unlike Muscovite, Biotite contains iron and magnesium, which give it a darker color and a different set of properties. Biotite is less commonly used in applications requiring high purity due to its higher iron content. However, it is still utilized in various industrial applications such as asphalt and rubber products. Its thermal stability makes it suitable for high-temperature applications. Biotite also plays an essential role in geology as an indicator of temperature and pressure conditions in metamorphic rocks.

Mica powder is incredibly versatile, finding a home in numerous industries

Automotive Industry: The material is used in automotive components such as ignition systems and battery terminals, where durability and electrical insulation are critical.

Natural mica powder and synthetic mica powder also have great differences in electrical insulation, mechanical properties, chemical stability, application range and cost. Natural mica powder has good electrical insulation, but the volume resistivity is lower than that of synthetic mica. Synthetic mica powder has better electrical insulation properties, high volume resistivity and stable dielectric constant, and is suitable for high performance electrical insulation materials. The hardness of natural mica powder is relatively low (2-3), and it has good elasticity and peeling property. The hardness of synthetic mica powder is higher (between 3 and 4), and the tensile strength and compressive strength are better than that of natural mica powder. Natural mica powder is stable in acid-base solution, but it is easy to decompose at high temperature. Synthetic mica powder is stable to acid and base at room temperature, but will be slowly corroded by sulfuric acid above 300℃. Better thermal stability, not easy to release gas. Natural mica powder is widely used in electrical appliances, welding rods, rubber, plastics, paper making, paint and other fields. Synthetic mica powder is mainly used in high-end electrical insulation materials, aviation, aerospace, national defense industry and other high-tech fields. Because synthetic mica powder needs to be produced through complex chemical processes, its production cost is usually higher than that of natural mica powder. Therefore, in the market, the price of synthetic mica powder is often higher than that of natural mica powder. However, with the continuous progress of production technology and the gradual emergence of scale effects, the price of synthetic mica powder is expected to gradually decrease.