Many skin care products will add mica, what exactly does mica do?

The role of mica is to dredge the meridians, deheat and detoxify, and play a calming role in cosmetics.

Mica is a natural mineral with a shiny and hard texture, which can be used in eyeshadow or as a highlighter. It has a brightening effect when applied to **. It will increase the touch and texture of **.

Mica can make cosmetics more shiny, and it can also moisturize, wrinkle, and remove UV rays.

Mica is a type of rock-forming mineral with hexagonal sheet-like crystals and is one of the main minerals of rock-forming minerals. The mica crystal has a layered structure inside, so it is a layered crystal, mainly a hexagonal layered crystal.

It is characterized by insulation, high temperature resistance, sericite is the most widely used in industry, widely used in coatings, paints, electrical insulation and other industries.

Mica minerals can be formed in a variety of geological conditions. Biotite is one of the main rock-forming minerals of igneous rocks and is distributed in most of the rock base and epigenetic rocks. Muscovite is also a widely distributed rock-forming mineral found in igneous, sedimentary, and metamorphic rocks.

Phlogopite is mainly found in ultramafic rocks and magnesia marble.

Many industrially valuable micas are mainly found in pegmatites and metamorphic rocks. The large area of phlogopite in metamorphic rocks is the result of metasomatism of volatile magmatic rocks on the surrounding rocks. Fine muscovite and sodium mica, also known as sericite, are often associated with hydrothermal alteration.

Lepidolite is produced almost entirely from granitic pegmatites and granite-related high-temperature epithermal deposits.

Mica is a kind of hydrated aluminosilicate with complex structure, which is commonly composed of granite with quartz and feldspar, or symbiotic in other mines, and is mainly pegmatite. It is widely found in nature, such as in soil, but has no development value because the content is too low. In addition to pegmatites, mica is also mineralized in detrital aggregates, with the former commonly used to strip large sheets of mica (a high-grade insulating material for electrical appliances) and the latter used to produce mica powder and detrital products.

In India, the main producer of mica, and the United States, the largest user of mica, mica powder is also produced from a large amount of leftovers formed in the processing of large pieces of mica, but most countries do not have this condition.

The molecular structure of mica can be expressed by M1M2(Al2Si6O20)(OH)4[1]. Different M1 and M2 form different mica varieties, for example, M1 K2 and M2 Al4 are muscovite, crystalline water is more sericite, and M1 Na2 is paragonite. In phlogopite, M2 is Mg6, and OH can be substituted by F, and all OH substituted by F is fluorophlogopite, which does not exist in nature and is purely artificial.

When M2 is mg and or divalent Fe (a total of 12 valent), it is called biotite, and there are many varieties containing metal ions such as lithium, vanadium, chromium, etc. Natural mica is generally dominated by a certain kind of mica, and at the same time contains a certain amount of other varieties.

Mica, like granite, has extremely high stability, does not react with strong acids and alkalis in general, and is not soluble in water and various solvents, and only begins to lose crystal water at about 800 C, and can work normally at higher temperatures (such as 1200 C). Mica also has extremely high insulating properties (1012 15 ohms. cm), among which fluorphlogopite and muscovite are the best, while fumica is slightly inferior due to its high iron content.

Other performance differences between different mica varieties are small.

The most important feature of mica is that it has an excellent flake crystal shape, and can peel off large sheets with a thickness of only a few microns, with a minimum limit thickness of about 1 nanometer, which is not found in any other mineral. The mica wafer is dense, hard and elastic, and the surface is smooth, shiny, and pearlescent. Opaque, can absorb ultraviolet rays, and has a high infrared radiation ability.

In particular, the wet-processed mica powder has extremely thin wafers (nanometer level), has great coverage and barrier functions, and has many uses in various materials, which can give the material a variety of excellent properties. In this regard, the application of wet mica powder is irreplaceable in many occasions.

MicaIt is a general term for potassium, aluminum, magnesium, iron, lithium and other layered aluminosilicates.

Polymorphism is common, among which the monoclinic crystal system is common, followed by the trigonal crystal system, and the rest are rare. The most common mineral species in the mica group of minerals are biotite, muscovite, phlogopite, lepidolite, etc. Mica is usually pseudohexagonal or rhomboid, plate-like, columnar-shaped.

The color varies with the chemical composition, and mainly darkens with the increase of Fe content. Muscovite is colorless, translucent or light-colored; Biotite is black to dark brown, dark green and other colors; Phlogopite is yellow, brown, green, or colorless; Lepidolite is light purple and rose red to gray. Vitreous luster, pearly luster on cleavage surfaces.

Mohs hardness is generally 2, specific gravity. The cleavage of the parallel base is extremely complete.

Uses:Muscovite and phlogopite have good electrical insulation, non-thermal conductivity, acid resistance, alkali resistance and voltage resistance, so they are widely used to make insulation materials in the electronic and electrical industries. Mica fragments and powders are used as fillers, etc.

Lepidolite is also the main mineral raw material for the extraction of lithium.

No.

The mica in cosmetics has a good anti-ultraviolet effect, but long-term use of cosmetics with high mica content will cause some irreversible damage to **, which is harmful. When choosing cosmetics, be sure to choose cosmetics that suit your skin type and big brands. This kind of cosmetics will cause less damage to **, and the effect is more obvious.

Cosmetic considerations.

Avoid sub-packaging containers often have not been sterilized and sterilized, and casual sub-packaging will bring in germs. If you're going on a trip or using makeup and skincare products in the office, it's a good idea to buy a travel kit or a small packet.

Do not use makeup tools for a long time without changing the puff, sponge, etc., after using it once, it will be contaminated with sebum, sweat and bacteria. Therefore, tools used for makeup should be updated frequently. For dual-purpose foundation and powder, if you dip it in a sponge soaked in water, wash it off after use, dry it completely and put it in a cool place to prevent mold spots.

Mica is a rock-forming mineral with hexagonal sheet-like crystals and is one of the main rock-forming minerals. The mica crystal has a layered structure inside, so it is a lamellar crystal, and the hexagonal flake crystal is the main one. MicaRefractive indexAs the iron content increases, it increases correspondingly, and can be raised from low positive protrusionsZhongzhengProtuberance.

The color varies with the chemical composition, mainly darkening with the increase in iron content. Muscovite is colorless, translucent or light-colored; Biotite is black to dark brown, dark green and other colors; Phlogopite is predominantly yellow, brown, green, or colorless; Lepidolite.

It is lavender, rosy red to gray in color. Vitreous luster, Mohs hardness.

General 2, specific gravity.

Application areas of mica

Muscovite has high dielectric strength and greater resistance, lower dielectric loss and arc resistance, corona resistance and other excellent dielectric properties, and has a wide range of uses in industry. Phlogopite's main properties are slightly inferior to muscovite, but it has high heat resistance and is a good heat-resistant insulating material.

Flake mica is generally used in electron tubes in the radio industry.

Feeders, stamping parts, aviation industry.

And capacitor production department for parts specification sheet, capacitor chip, motor manufacturing for mica sheet, daily electrical appliances, lighting, etc.

Fragment mica refers to the general term for the mined fine mica, the waste residue after processing and stripping, and the leftover material after the processing of parts. It is mainly used in the production of various mica paper and mica plates as insulating materials, which are widely used in the electrical industry.

Mica powder has the following advantages in cosmetics: (1) Wet mica has good chemical stability, fine wet mica particles, acid and alkali resistance, aging resistance, and good shielding function for ultraviolet rays. After wet purification, its whiteness, hiding power, gloss, smoothness, dispersion, adhesion, etc. are greatly improved, can be evenly mixed with water and glycerin, and the texture is fine and elastic, it is the superior raw material of high-end beauty cosmetics and the preferred material for cosmetic foundation, which can be used as an ingredient for lotions, creams, pearlescent agents, etc.

The mica powder of Shenzhen Haiyang powder is the most famous. (2) Mica is a natural mineral product, with extremely high chemical stability, is a completely inert substance, so it is safe, non-toxic, harmless, and suitable for the requirements of cosmetics. (Mica is a component of granite and is chemically stable like granite.)

3) The mica wafer can shield ultraviolet and infrared rays, so it is an excellent anti-ultraviolet agent for cosmetics. Because it is all-natural, non-toxic and harmless, it has advantages that synthetic organic anti-ultraviolet agents do not have. Due to the extremely thin wafer and strong coverage ability, only a small amount of these products can form a layer of anti-ultraviolet protector and brightener invisible to the naked eye.

4) Because the mica wafer is subtle, the coverage on the ** is not continuous, so it does not affect the air permeability of the **, and the ** feels comfortable. (5) Water cannot penetrate the mica wafer, and it can inhibit the evaporation of water when used in moisturizing products. Therefore, the protective layer can delay the evaporation of water and improve the moisturizing of **.

1. Industrial use.

It is used in building materials industry, fire protection industry, fire extinguishing agent, welding electrode, plastic, electrical insulation, papermaking, asphalt paper, rubber, pearlescent pigment and other chemical industries. Ultrafine mica powder is used as a functional filler for plastics, coatings, paints, rubber, etc., which can improve its mechanical strength, enhance toughness, adhesion, anti-aging and corrosion-resistant.

In addition to having extremely high electrical insulation, acid and alkali corrosion resistance, elasticity, toughness and sliding properties, heat resistance and sound insulation, small thermal expansion coefficient and other properties, it also takes the lead in introducing the characteristics of smooth surface of the second sheet, large diameter-thickness ratio, regular shape and strong adhesion.

2. Pharmaceutical uses.

Mica, sweet in taste, flat in nature. Hurt by the wind evil and cold and fever, like the body sitting on a boat, dizzy, has the ability to eliminate the wind evil, enrich the five organs, increase fertility, make the eyes bright, long-term body light and dexterous, prolong life. Also known as cloud beads, cloud flowers, cloud Ying, cloud liquid, cloud sand, phosphorite, produced in the depths of the mountains.

There are many types of natural mica, and there are two kinds of muscovite and phlogopite used as electrical insulation materials. Muscovite has a vitreous luster, generally colorless and transparent; Phlogopite has metallic luster and semi-metallic luster, and the common ones are golden yellow, brown, light green, etc., and the transparency is poor.

Muscovite and phlogopite have good electrical and mechanical properties, good heat resistance, good chemical stability and corona resistance. Both types of mica can be peeled and processed into soft and elastic flakes with a thickness of up to millimeters. Muscovite has better electrical properties than phlogopite, but phlogopite is soft and has better heat resistance than muscovite.