Introduction:
Mica is a general term for mica minerals. It is an aluminosilicate of metals such as potassium, aluminum, magnesium, iron and lithium, which is layered and monoclinic. The crystals are pseudo-hexagonal, flaky or plate-shaped, and occasionally columnar. Layered cleavage is very complete, glassy and elastic. The refractive index of mica increases with the increase of iron content, which can be from low positive protrusion to positive protrusion. Iron-free varieties are colorless in thin slices. The higher the iron content, the darker the color, and the more polychromatic and absorptive it is.
Mica minerals mainly include biotite, phlogopite, muscovite, lepidolite, sericite, green mica, zinc mica and so on. Sandstone is a mixture of mica and seasonable minerals. Muscovite and phlogopite are widely used in industry, and lepidolite is an important mineral raw material for extracting lithium.
Use:
I. Industrial use:
In industry, biotite is mainly used as insulation material for electrical equipment and electrical equipment because of its insulation and heat resistance, as well as acid resistance, alkali resistance, pressure resistance and peeling resistance. Secondly, it is used to manufacture furnace windows and mechanical parts of steam boilers and smelting furnaces. Mica crumbs and mica powder can be processed into mica paper, and can also be used to replace mica sheets to make various low-cost insulation materials with uniform thickness.
Muscovite is the most widely used in industry, followed by phlogopite. Widely used in building materials industry, fire fighting industry, fire extinguishing agent, welding electrode, plastic, electrical insulation, paper making, asphalt paper, rubber, pearlescent pigment and other chemical industries. Ultrafine mica powder can be used as functional filler for plastics, coatings, paints, rubber, etc. It can improve its mechanical strength, toughness, adhesion, aging resistance and corrosion resistance. In addition to high electrical insulation, acid and alkali corrosion resistance, elasticity, toughness and sliding, heat and sound insulation, small thermal expansion coefficient and other properties, it is the first to introduce the characteristics of smooth two sides, large diameter-thickness ratio, regular shape and strong adhesion.
Second, mica medicinal:
Mica, sweet in taste, flat in nature, is used to treat muscle numbness as death. A cold and fever caused by wind evil, just like sitting on a boat, is dizzy. It has the functions of building bricks to eliminate wind evil, enriching five internal organs, increasing fertility, making eyes bright, keeping the body light and dexterous for a long time and prolonging life. Also known as yunzhu, Yunhua, Yunying, Ye Yun, clouds of sand and Phosphate, it is produced in the middle and deep mountains.