Mica Powder [SI]
Muscovite
CAS: 12001-26-2
Molecular Formula: Al2K2O6Si
Mica Powder [SI] - Names and Identifiers
Mica Powder [SI] - Physico-chemical Properties
| Molecular Formula | Al2K2O6Si |
| Molar Mass | 256.24 |
| Density | 2,77 g/cm3 |
| Water Solubility | Insoluble in water. |
| Appearance | Light gray to dark-coloredflakes or particles |
| Refractive Index | 1.55-1.61 |
| Physical and Chemical Properties | A general term for minerals of the mica group. Are complex silicates. Due to the polymorphism and different crystal system, mostly monoclinic system. The crystals are usually pseudohexagonal plate-like, and the aggregates are columnar, plate-like and scale-like. Glass gloss. Cleavage parallel to the bottom axial plane is extremely complete. An elastic sheet may be peeled along the cleavage. Mica is a widely distributed rock-forming mineral, commonly found in igneous, sedimentary and metamorphic rocks. High quality Muscovite is mainly produced in the granite pegmatite. Many kinds of mica, important Muscovite, biotite, phlogopite, Lepidolite and iron Lepidolite. Secondly, there are sericite and brittle mica, titanium mica, water Mica and so on. |
| Use | Mica has become an important raw material for power and electronics industry due to its good dielectric properties, such as capacitors and insulating materials. Because of its good heat resistance, it can be used as the lining of smelting furnace, the lining of rocket launch tube and the material of anti-corrosion layer of rocket engine. In addition, it can also be used for making mechanical parts, light-weight building materials, and as fillers for paper making, plastics, rubber and the like. Mica is also impact-resistant plastics, cosmetics |
Mica Powder [SI] - Risk and Safety
| Safety Description | 22 - Do not breathe dust. |
| RTECS | VV876000 |
| TSCA | Yes |
| HS Code | 25252000 |
Mica Powder [SI] - Nature
Open Data Verified Data
- Mica is a general term for hydrous aluminosilicate minerals containing lithium, sodium, potassium, magnesium, aluminum, zinc, iron, vanadium and other metal elements and having a layered structure, are complex silicates. Mica is usually pseudohexagonal or rhombic plate-like, plate-like, columnar crystal form. The color varies with the chemical composition. It is commonly found in igneous, sedimentary and metamorphic rocks. High quality Muscovite is mainly produced in the granite pegmatite. There are many kinds of mica, including Muscovite, biotite, phlogopite, Lepidolite, iron Lepidolite, sericite and brittle mica, titanium mica, water Mica and so on. The main industrial values are Muscovite, magnesium Silicon Muscovite and phlogopite.
- the chemical formula of Muscovite is KA12 (AIS3 0io)(OI-D2, wherein SiO 45. 2%, A1203 38 5%, K2O 11.8%, H 204.5%, in addition, containing a small amount of Na, Ca, Mg, Ti, Cr, Mn, Fe and F. Muscovite thin film generally colorless and transparent, but often dyed green, brown, yellow and pink and other colors; Glass gloss, cleavage of pearl luster. The transparency of the Muscovite is 71. 7-87. 5%, the elastic modulus of the Muscovite is (1475.9-2092.7)× 106, and the Mohs hardness is 2-2.5.
- the chemical formula of phlogopite is KMg3 (AISi3 0io)(F,OH)2, wherein K207 10. 3%, Mg0 = 21. 4% ~ 29. 4%, A12 03 10.8% ~ 17%, SiO2 38. 7%~ 45%, H2O is 0.3% ~ 4.5%, containing a small amount of Fe, Ti, Mn, Na and F, etc. Phlogopite is usually yellow, brown, dark brown or black; Glass luster, cleavage of pearl or semi-metallic luster. The transparency of phlogopite is 0-25. 2%, the elastic modulus of phlogopite is (1394.5-1874. 05)× 106, and the Mohs hardness of phlogopite is 2.78-2. 85.
- the chemical formula of magnesium Silicon Muscovite is (Fe2 +,Mg) (Fe3 +,A13 +) esisi7020] (OH)4, its composition is characterized by S content is higher than that of Muscovite and phlogopite, Al203 content is between Muscovite and phlogopite, Mg0 content is higher than that of Muscovite, lower than that of phlogopite.
Last Update：2024-01-02 23:10:35
Mica Powder [SI] - Preparation Method
Open Data Verified Data
The Mica beneficiation process is different according to the origin and the nature of the raw ore. It is divided into two processes: dry and wet. The dry beneficiation method is that the raw ore is subjected to coarse crushing, impurity removal, fine crushing and sorting to obtain the product, and the ultra-fine crushing process can be carried out after fine crushing as needed. Wet beneficiation is obtained by washing, coarse crushing, fine crushing, grinding, separation, dehydration and drying of raw ore.
Last Update：2022-01-01 09:07:18
Mica Powder [SI] - Use
Open Data Verified Data
The sheet-like mica is generally used for the electronic tube sheet and the capacitor sheet for the radio industry, the mica sheet for the manufacture of electric motors, and various types of sheets used in household electrical appliances, telephones, lighting, and the like. Broken mica can produce a variety of Mica paper, such as insulation materials. Because of its good dielectric properties, Mica has become an important raw material for power and electronics industry, used as capacitors and insulating materials. Its heat resistance is good, and it can be used as the furnace lining of smelting furnace, the rocket launch tube lining and the corrosion resistant layer material of rocket engine. It can also be used in the production of mechanical parts, lightweight building materials, cable wrapping, welding electrodes, and as fillers for paper making, plastics, rubber and the like. In addition, it is also used in the production of Mica ceramics, Mica cast products, Mica reinforced plastics, pearlescent pigments and new Mica building materials. Superfine Mica powder for plastic, paint, paint, rubber and other functional fillers, can improve its mechanical strength, enhance toughness, adhesion, anti-aging and corrosion resistance.
Last Update：2022-01-01 09:07:19
Mica Powder [SI] - Safety
Open Data Verified Data
can cause pneumoconiosis, Cough, Dyspnea, weakness, weight loss. Repeated exposure will stimulate the lungs, large doses of contact, the lungs appear plaque scar, chest X-ray showed abnormal, and cause Cough and shortness of breath. Staff should be protected. If the eyes and skin are touched, they should be immediately rinsed with running water. Stored in a closed container, placed in a cool, ventilated place.
Last Update：2022-01-01 09:07:19
Mica Powder [SI] - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Mica | Mica is a general term for mica minerals, including potassium, aluminum, magnesium, iron, aluminum silicate of lithium and other metals, are layered structure, monoclinic system. The refractive index of Mica increases with the increase of iron content, and can be from low positive protrusion to positive protrusion. Varieties of iron-free, thin colorless, high iron, the darker the color, polychromatic and absorption enhancement. Mica block mica has very high insulation, thermal insulation performance, good chemical stability, strong acid resistance, strong alkali and compression resistance, so it is an important raw material for the manufacture of electrical equipment, therefore, it can also be used as an insulating material in the blower. Mica also has birefringence ability, so it is also an optical instrument material for manufacturing polarizing plate. Mica mining used in the electrical industry must be mica blocks with an effective area greater than 4cm 2 and free of cracks, perforations, and non-mica minerals on the edges not exceeding 3mm. The quality of mica is divided into 4 categories according to the effective area after mining, and the best special type area is greater than 65 square cm. The most widely used in industry is Muscovite, followed by phlogopite, which is widely used in building materials industry, fire fighting industry, fire extinguishing agent, electrode, plastic, electrical insulation, paper making, asphalt paper, rubber, pearlescent pigments and other chemical industry. Superfine Mica powder for plastic, paint, paint, rubber and other functional fillers, can improve its mechanical strength, enhance toughness, adhesion, anti-aging and corrosion resistance. |
| natural mica | natural mica (Mica for short) is a kind of natural inorganic mineral belonging to aluminosilicate, it has many types, in the electrical insulation materials, occupies an important position of only two kinds of Muscovite and phlogopite. Muscovite with glass luster, generally colorless and transparent. Phlogopite close to metal or semi-metallic luster, common with golden yellow, brown or light green, the transparency is slightly poor. Muscovite and phlogopite have good electrical and mechanical properties, good heat resistance, chemical stability and corona resistance. The two kinds of mica have a good understanding, and can be peeled into a soft and elastic mica sheet with a thickness of 0.01 to 0.03mm. The electrical properties of Muscovite are better than that of phlogopite; Phlogopite is soft and heat resistant than Muscovite. The main properties of natural mica and synthetic mica are shown below: According to the use of mica, mica can be generally divided into three categories: mica sheet (also known as exfoliated MICA), mica sheet for capacitor and mica sheet for electron tube. The grades and uses of mica flakes are as follows: |
| The History of the use of mica by the ancient people | the pottery made of mica in the neolithiasis era, and mica sheets were buried in the graves of the Xia Dynasty, at the beginning of the Western Zhou Dynasty, a considerable number of mica pieces were found, and at the beginning of the Western Han Dynasty, there were already mica pendant pieces. Liu An in Western Han Dynasty "Huainan Wan Pi" said: "Mica man and earth, a thousand-year-old immortal." Mica screen was found in the Royal Palace of Han Dynasty. Ge Hong of Jin dynasty discussed the types and properties of mica and the methods of identifying true and false in "baopouzi Xianyao. He said: "There are five kinds of mica, and the number of people can not be separated. Law should be raised to the sun, to see its color, a detailed account of the view, can be aware. The patient was seen with Yin, without mottling. Five colors with the name of Yunying and more blue; Many red name of Yunzhu; Many white name of Yunye; Many black name of mica; But there are two colors of green and yellow name of yunsha; pure white phosphite." Its nature is "heavy fire, the end of the time or (burning), buried the never corruption." From the archaeological data, from the Han Dynasty to the Northern and Southern dynasties, there are mica pieces of earth, its role is to try to preserve the body of the immortal. Tang and Song dynasties later use mica to decoration, screen, window paper, etc. |
| classification | mica mainly includes biotite, phlogopite, muscovite, Lepidolite, sericite, mica, Lepidolite, sand gold is a mixed mineral of mica and quartz. Muscovite and phlogopite are most widely used in industry. Lepidolite is an important mineral raw material for extracting lithium. Mica is widely found in Asia, Africa and the Americas, but very little in Europe, until the 19th century, the value of mica in Europe is still very high, with the colonists in Africa and South America, the price of Mica rapidly depressed. |
| mica mineral resources | Mica is the ore of silicate mineral Muscovite, which is widely distributed in gneiss, mica schist, phyllite occupies a significant position in Muscovite, mica granite and pegmite. A large number of Muscovites are often produced when silico-aluminous rocks are subjected to Coriolis petrogenization. Sometimes found in sandstone. Mica mineral resources are widely distributed in the world. Mica resources are mainly distributed in India, Brazil, Zimbabwe, Tanzania, the Soviet Union and other countries, with India as the top, madagascar and the Soviet Union are rich in phlogopite, which is famous for the Canadian phlogopite. In the past 20 years, there has been little progress in the exploration of mica mineral resources, and almost no new industrial mica deposits have been found. Some old deposits have been nearly exhausted after many years of mining, the world Mica resources are still sufficient. Muscovite is a widely produced rock-forming mineral, but the only one of industrial value is the Muscovite deposit in the granite pegmatite (India, Soviet Union). The characteristics of the deposit are that the pegmatite generally appear in groups of bands, forming rock belts or rock fields, the shape of the ore-bearing parent rock is complex, and the internal structure of the rock mass is also complex, the ore content and Mica quality often depend on the composition of surrounding rock and underlying rock. The patchy phlogopite is mainly derived from carbonate complex and secondary to the metamorphic deposit in skarn. Carbonatite Complex-type phlogopite deposits only occur in the platform environment, especially closely related to the alkaline-ultra-basic intrusion complex (sometimes volcanic-intrusion complex), controlled by deep and large faults, the rock mass is large in size, ranging from several tens to 2000 km2, and is the main source of phlogopite. The metamorphic phlogopite deposit in skarn is mainly produced in the ancient times, and the deposit is distributed in the magnesium Rock Zone. The rate of gold Mica is low, and the reserves are small, but the quality of the gold Mica is high (low iron content), and it is also paid attention. broken Mica refers to the material that can not be used as the sheet mica, such as the waste, fragments and processing residues left in the production of mica and the recovered mica (scale mica) in the mining of other deposits.. Their distribution is widespread and their reserves are considerable. |
| Mica capacitor | Mica capacitor is a kind of capacitor with natural mica as the medium, the Mica capacitor has the following advantages, which cannot be replaced by other capacitors. (1) Small Loss: when the capacity is less than or equal to 82pF, the loss is in the range of 10~30 × 10-4, and when the capacity is greater than 82pF, the loss is less than 10 × 10-4, minimum up to 3 x 10-4, even at very high temperatures, the loss is still within the allowable range; (2) good heat resistance: has been able to produce temperature-resistant 200 ℃ Mica capacitor; (3) excellent high-frequency characteristics: because of its inherent small inductance, Mica capacitor can work at a higher frequency, the metal-encapsulated capacitor operates at a maximum frequency of up to 600MHz. (4) High precision: generally can reach ± 1%, ± 2%, ± 5%, the highest precision can reach 0.01%; (5) Good capacity stability: the temperature coefficient of the best can be stable in the range of ± 10 x 10-6/C, under the specified storage conditions, after 14 years of storage, its capacity change does not exceed ± 1 ↑ Mica capacitor is not only widely used in electronic, power and communication equipment, but also for the stability and reliability of aerospace, aviation, navigation, rocket, satellite, military electronic equipment and oil exploration equipment. |
| sericite | sericite is a mica mineral, which is a flaky fine-grained muscovite. The structure is two octahedron, which is composed of two layers of silicon oxide tetrahedron and a layer of aluminum oxide octahedron, tetrahedron top oxygen (active oxygen) and additional anions (OH) the position is in the center of the two-layer six-sided network, and constitutes an active crystalline water group. Cleavage is complete, can be split into very thin sheet, large diameter-thickness ratio, elastic, high temperature resistance (above 600 ℃), strong chemical corrosion resistance, has excellent shielding effect to UltraViolet, the appearance is silk luster, feel delicate lubrication, good affinity with the skin, especially suitable for cosmetics, can also be used in plastics, coatings and other industries. The chemical composition, structure and structure of sericite are similar to those of kaolin, and have some characteristics of clay minerals, namely, good dispersion and suspension in aqueous medium and organic solvent, fine white grains, adhesive, etc. Therefore, sericite has many characteristics of both parent minerals of cloud and clay minerals. When it is used in coatings, it can greatly improve the weather resistance and water permeability of the coating, enhance the adhesion between the coating and the substrate and the strength of the coating, and improve the appearance of the coating. At the same time, the dye particles are easy to enter the lattice layer of sericite, so as to keep the color from fading for a long time. In addition, sericite also has the function of anti-algae and anti-mildew, which is commonly used in marine and marine coatings abroad. Therefore, sericite powder is a kind of multifunctional filler with excellent price performance ratio for coating. |
| Source of Mica | Mica is the ore of silicate mineral Muscovite, which is widely distributed in gneiss, mica schist and phyllite, it occupies a significant position in Muscovite, two mica granite and pegmite. A large number of Muscovites are often produced when silico-aluminous rocks are subjected to Coriolis petrogenization. Sometimes found in sandstone. Mica mineral resources are widely distributed in the world. Mica resources are mainly distributed in India, Brazil, Zimbabwe, Tanzania, the Soviet Union and other countries, with India as the top, madagascar and the Soviet Union are rich in phlogopite, which is famous for the Canadian phlogopite. |
| classification and application of mica products | Mica is an important electrical insulating material. Widely used in electronics, electrical, telecommunications, electrical, instrumentation, and the production of high-pressure boilers, instruments on the special needs of parts. Mica powder can be used for marine ships, ships, special paint and some special filler and so on. At present, the mica products used in the electrical industry mainly include: Mica tape, mica plate, Mica foil and Mica glass. The composition, characteristics and application range of various types of mica products are shown below: |
| Application | Mica has become an important raw material for power and electronics industry due to its good dielectric properties, such as capacitors and insulating materials. Because of its good heat resistance, it can be used as the lining of smelting furnace, the lining of rocket launch tube and the material of anti-corrosion layer of rocket engine. In addition, it can also be used for making mechanical parts, light-weight building materials, and as fillers for paper making, plastics, rubber and the like. Mica is also an impact-resistant plastic, cosmetics can be used as building materials, paper, pigments, plastics, rubber and other fillers |
| production method | The Mica beneficiation process varies according to the origin and the nature of the raw ore, and is divided into two processes: dry and wet. The dry beneficiation method is that the raw ore is subjected to coarse crushing, impurity removal, fine crushing and sorting to obtain the product, and the ultra-fine crushing process can be carried out after fine crushing as needed. Wet beneficiation is obtained by washing, coarse crushing, fine crushing, grinding, separation, dehydration and drying of raw ore. |
| category | spontaneous combustion articles |
| flammability hazard characteristics | spontaneous combustion in case of heat, sun exposure, open flame and oxidant |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from oxidant and strong acid |
| extinguishing agent | dry powder, dry sand, foam |
| Occupational Standard | TWA 6 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentrations | 1,500 mg/m3 |
Last Update：2024-06-13 11:01:04
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