Yuan Lei's Little Knowledge | Four Types of Muscovite Minerals and Their Applications
Muscovite minerals have excellent chemical stability, difficult to dissolve in acid and alkali solution, and has excellent electrical insulation, resistance to various radiation, waterproof and moisture-proof and specific optical properties. Widely used in electrical appliances, electronics, aviation, aerospace and other cutting-edge science and technology fields, as well as high-grade coatings, paints and other aspects. At present, muscovite minerals mainly include muscovite, sericite, illite, microcrystalline muscovite, etc., which are important industrial minerals.
(1) flake muscovite
Generally refers to the effective area of more than 4cm2 muscovite, is also the most industrial value of a class of mica, mainly used in the electronics industry and electrical industry, especially as an insulating support element.
The flake muscovite is used in the production of mica capacitors, which is one of the main uses in the electronics and electrical industries. Mica capacitors have good electrical properties, heat resistance, stability and high capacity accuracy. The use of flake muscovite stripping performance is better than other characteristics of mica to make large scale mica paper, which is another major use of flake muscovite.
In addition, the sheet muscovite is used for dust-proof and moisture-proof closed motor and engine armature insulation, rectifier commutator insulation, motor and engine coil insulation, insulating washers and terminal plates. Can also be used for various equipment (such as radios, televisions, hearing aids, etc.) in some parts of the support sheet and spacer and household heating appliances.
(2) crushed muscovite
Broken muscovite refers to the leftoffs of sheet muscovite and muscovite produced in deep metamorphic rocks that do not meet the requirements of industrial raw materials.
· Mica powder
Mica powder is obtained by dry or wet crushing of crushed mica, and different particle sizes have different uses.
· Mica paper
Mica paper is made of crushed mica by pulping, molding, pressing and other processes.
· Powder mica tape
Mica tape is a soft mica material made by baking mica paper adhesive (epoxy resin, etc.) and reinforcing material (glass cloth, etc.).
· Other applications
Mica plate, mica ceramic, insulation anti static pressure plate, etc. are broken mica as the main or important raw material production.
Sericite is a very small flaky (generally <0.01mm) muscovite, with excellent physical and chemical properties, can be widely used in coatings, rubber, plastics, cosmetics, ceramics and other fields. For example, the layered structure of sericite can keep the paint film from fading for a long time after dye particles enter the lattice layer of sericite. Sericite's unique flake structure can effectively improve the damping property of rubber. In the paper industry, adding sericite powder can increase the color brightness of paper, improve the ultraviolet reflection ability and corrosion resistance of paper, and the paper stored for a long time is not easy to yellow. In the production of welding electrodes, sericite powder is used as the coating of electrode, which can prevent the cracking of the coating, play the role of anti-flux, and can also give the electrode coating good slipperiness and viscosity.
In recent years, the research of sericite is mainly used as a filler in plastic insulation materials. The development and utilization of sericite resources can make up for the shortage of flake muscovite resources and promote the development of insulating materials. It has the effect of strengthening and modification, and has good heat resistance and insulation, so it can improve the heat resistance and electrical insulation of the product, reduce shrinkage and warpage.
Illite is a layered structure mineral containing structural water and a large amount of adsorbed water. Because it is rich in potassium and aluminum, it can be used for industrial products such as potassium fertilizer and 4A zeolite. Its good heat insulation, insulation performance and chemical stability and dispersion, can be used in ceramics, rubber, plastics, cosmetics and other industries. Large specific surface area and high cation exchange capacity, the metal ions in the environment have a strong adsorption. And because of its plasticity, high strength, wear resistance, flame retardancy and other characteristics, can be used in building panels.
(5) Microcrystalline Muscovite
Microcrystalline muscovite is a rare high-quality muscovite resource. Microcrystalline muscovite is mostly flaky, plate-like, and scale-like, with a certain diameter-to-thickness ratio. The mica sheet has good toughness and elasticity, large sliding ability, high tensile and compressive strength, acid and alkali resistance, corrosion resistance, small thermal expansion coefficient, good heat resistance, and can shield ultraviolet and infrared radiation. When used as a filler in rubber and plastics, because of its special microstructure, good physical properties can improve the mechanical properties of polymer materials while reducing material costs. And because of its low dielectric loss, anti-arc, corona resistance, high insulation strength, can be used as a functional filler to improve the electrical properties of the material.
Species, mica, muscovite, flake, with, insulation, material, application, industry, performance
The difference between barium sulfate（BaSO4） and barium sulfite（BaSO3）
Kaolin is a non-metallic mineral, which is a kind of clay and clay rock mainly composed of kaolinite clay minerals. Because it is white and delicate, also known as white earth. It is named after Gaoling Village, Jingdezhen, Jiangxi Province.