Mica is the general name for mica minerals. It is an aluminum silicate of potassium, aluminum, magnesium, iron, lithium and other metals. They are all layered structures and monoclinic system. The crystals are pseudo-hexagonal flakes or plates, and occasionally columnar. The lamellar cleavage is very complete, with a glassy luster, and the flakes are elastic. The English word Mica comes from Latin, meaning “crumbs”.
Characteristics and uses of mica
Mica mines are widely found in Asia, Africa and the Americas, but rarely in Europe. Until the 19th century, the value of mica in Europe was still very high. As colonists opened tetrahydrofuran formic acid to mine mica in Africa and South America, the price dropped rapidly. .
Characteristics and uses of mica
Mica has very high insulation and thermal insulation properties, good chemical stability, and resistance to strong acids, strong alkali and pressure. Therefore, it is an important raw material for manufacturing electrical equipment, so it can also be used as an insulating material in hair dryers. Mica also has birefringence ability, so it is also an optical instrument material for manufacturing polarizers.
Characteristics and uses of mica
Mica minerals mainly include biotite, phlogopite, muscovite, lepidolite, lepidolite, etc. Aventurine is a mixed mineral of mica and quartz. Mica is widely used in the building materials industry, fire protection industry, fire extinguishing agents, welding rods, plastics, electrical insulation, papermaking, asphalt paper, rubber, pearlescent pigments and other chemical industries.
Muscovite and phlogopite are most commonly used in industry. Lepidolite is an important mineral raw material for refining lithium.
Mica mining used in the electrical industry must be mica blocks with an effective area greater than 4 square centimeters, without cracks or holes, and non-mica hydroxytetrahydrofuran minerals on the edges must not exceed 3 mm. After mica is mined, the quality is divided into four categories according to the effective area. The best special category has an area greater than 65 square centimeters.
