What properties does the mineral mica have?
Many people had to hold in their hands a shiny layered stone consisting of thin plates, which is easily separated into parts even with little effort. This fragile, but at the same time ductile, flexible and durable mineral is called mica. Let’s consider what is mica and where it is applied.
Brief information about mica
- Magnesian-ferruginous (biotite, phlogopite, lepidomelane)
- Aluminum (muscovite, paragonite)
- Lithium (lepidolite, tainiolite, zinnwaldite)
Mica is mined in mines using open or underground methods. Mica crystals are selected manually from the rock mass. Due to its good sound and heat insulating properties, mica is used in various industries – electrical engineering, radio electronics, electrothermy. Phlogopite and muscovite are used as electrical insulating materials in aircraft and electrical engineering. Lepidolite is used in the manufacture of optical glasses.
Industrial mica comes in three types:
- sheet, which is sheets of large sizes;
- small-size and scrap (waste obtained during the processing of large-size mica);
- intumescent.
Interesting facts about mica
It is known that back in Ancient Egypt, mica was used for beauty. It was ground into powder, mixed with oil and used as eyeliner. In modern cosmetology, talc is made from purified crushed mica, which perfectly mattifies the skin, giving it a velvety feel. Pearlescent miks are obtained from mica and mineral pigments, creating the effect of pearl shimmer on the face.
Of particular interest is the development of deposits and the use of mica in pre-revolutionary Russia. The mineral was exported to Europe, where it was called “muscovite”, “Moscow glass”. Although the cost was quite high, in the royal chambers, boyars and merchant houses, starting from the 16th century, windows began to be covered with mica. Compared to overseas glass, local mica was still cheaper.
In the exhibitions of some museums you can see mica windows – metal frames with mica canvases. Each canvas consists of several mica plates, fastened together with double iron strips or simply wired harsh thread. Multi-colored windows, skillfully made in the form of stained glass with various designs, have also been preserved.
- History of mica mining in Russia
- Mica fishing in old Russia
- Mica industry after the revolution
- Current state of mica mining in Russia
- Traces of mica. Who found them on Mama
- Mica factories in Russia
- Mamsko-Chuiskoye field
- Main mica-bearing regions of Russia
- Application of mica
- Mineralogical characteristics
- Chemical composition and chemical properties
- What is mica
- Types of mica
- What is PSMA
- Mica plates
- Mica for microwave ovens
- Mica phlogopite
- Lepidolite
- Vermiculite
- Mica CO
- Brief information about mica
- Types and uses of mica
- What is muscovite
- Mica products
- Properties of mica
- Properties of muscovite
- SMOG mica plates
- Muscovite in the Irkutsk region
- SMOE
- SMOP
- SMOSH
- Muscovite
- Buy mica
- Mica plates
- Mica factory of the Siberian Minerals company
- Mica
- Mica mining
- Mica factory
- Mica microwave
- Mica plates
- Mica muscovite
- Buy mica
- Mica mining
- Mica muscovite
- SMOSH
- PSMA
- Mica mining
- Where to buy mica?
- SMOSH (cut muscovite mica for brush holders)
- Mica microwave
- SMGP (muscovite mica for generator devices)
- Capacitor mica
- Muscovite
- Mica SF (filter mica)
- GOST 13751-86
- Buy mica
- Where to buy mica?
- Mica SMOE
- Mica SMGP
- Mica SMOSCH
- Mica CO
- How is mica mined?
- What is muscovite?
- What is capacitor mica?
- What is SMOE?
- What is microwave mica?
- Where is the best place to buy mica?
- Mica SMOG
- Mica SMA
- Mica factory of the Siberian Minerals company
- Mica plates
- Where can I buy mica at a profit?
- Mica mining in the Irkutsk region
- Mica capacitor
- Protective mica
- Mica SMOP
- Where to buy mica in the Irkutsk region?
- Mica mining in the Irkutsk region
- Mica SMGP
- Mica VLF
- Mica cut
- Mica mining in the Irkutsk region
- Where to buy mica and mica products?
- Production of mica SMOE
- Mica production SMOSCH
- Microwave mica production
- Where can you buy mica?
- Production of mica SK (mica for valves)
- Mica production SMGP
- Where is it profitable to buy muscovite?
- Where is it profitable to buy cut mica?
- Where can you buy mica in bulk?
- Mica mining in the Irkutsk region
- Where can I buy capacitor mica?
- Where can I buy protective mica?
- Where can I buy SMOP mica?
- Muscovite and its scope
- Where is it profitable to buy SMOE mica?
- Where is it profitable to buy mica SMOSH?
- Where is it profitable to buy microwave mica?
- GOST 13751-86
- Sale of mica from the company “Siberian Minerals”
- Mica mining in the Irkutsk region
- Where can I buy mica SMGP?
- Where is the best place to buy mica parts?
- GOST 13752-86
- Where can I buy mica at a profit?
- Mica SSP
- Mica VLF
- Mica CO
- Mica CP
- Mica mining in the Irkutsk region
- Mica grade SMOP
- Where can I buy cut mica?
- Where are mica plates used?
- Where is it profitable to buy capacitor mica?
- Muscovite mining in the Irkutsk region
- Mica SMOE and its scope of application
- Mica SMOSCH and its scope of application
- Microwave mica and its scope of application
- Where to buy mica on favorable terms?
- Mica mining and sale
- Mica PSMA and scope of its application
- Mica SEP and its scope
- Mica SPM and its scope of application
- Mica SMA and its scope of application
- Where can you buy mica in bulk?
- Mica SZ and its scope of application
- VLF mica and its scope of application
- Mica CO and its scope of application
- Spacer mica and its scope of application
- How is mica mined?
- What is capacitor mica used for?
- Where can I buy cut mica wholesale?
- Where are mica plates used?
- Where is it profitable to buy SMOP mica?
- Where can you buy mica in bulk?
- Where is it profitable to buy SMOE mica?
- Where is it profitable to buy SMGP mica?
- Where is it profitable to buy microwave mica?
- What is muscovite and where is it used?
- Sales of mica from the manufacturer
- Where to buy mica SMOSH?
- Where to buy mica SMA?
- Where to buy SEP mica?
- Where to buy mica SPM?
- Properties and scope of application of spacer mica
- Properties and scope of application of mica SK
- Properties and scope of application of mica CO
- Properties and scope of application of VLF mica
- Properties and scope of application of mica SZ
- Mica mining in the Irkutsk region
- Where can I order mica products?
- Where can I order mica plates?
- What is cut mica used for?
- What is microwave mica used for?
- Where can I buy mica on favorable terms?
- What is muscovite and where is it used?
- Where can I order mica SMGP?
- Where can I order SMOE mica?
- What is SMOSH mica used for?
- What is SPM mica used for?
- What is VLF mica used for?
- What is mica CO used for?
- What is SZ mica used for?
- Where is it profitable to buy cut mica?
- Where is it profitable to buy spacer mica?
- Where can I order mica SEP?
- Where can I order SMA mica?
- Where can I order mica SK?
- Where can I buy muscovite at a profit?
- Where is it profitable to order mica products?
- Where is it profitable to order mica plates?
- Where to buy capacitor mica?
- Where can I buy microwave mica?
- Properties and purpose of capacitor mica
- Properties and purpose of mica SPM
- Properties and purpose of VLF mica
- Properties and purpose of mica CO
- Properties and purpose of mica SZ
- Crystal structure
- Mica hardness
- Heat resistance
- Swelling and water release
- Thermal conductivity
- Electrical Conductivity
- Electrical strength
- double refraction
- Shine, transparency of micas
- Density
- Hygroscopicity, water absorption
- Crystal surface microrelief
- Electrification of crystals and splitting work
- Secondary bonds in a split crystal
- Molecular water and thermal pinch
- Shear force anisotropy
- Defective cut edge
- Types of deposits
- Search and exploration of mica-bearing bodies
- Deposit sampling
- GOST 13752-86
- GOST 13751-86
- GOST 18096-87
- TU 5724-025-00281944-01
- GOST 13753-86
- GOST 13750-88
- GOST 7134-82
- GOST compliance
- Muscovite
- Mica mining
- Mica deposit in Russia
- Applications of mica insulation
- Mica spacer
- Mica parts
- Mica plates
- Mica cut
- Characteristics and history of mica mining
- Production of mica products by Siberian Minerals company
- Types of mica and their purpose
- Properties of mica for attenuators
- Properties of mica for vacuum devices
Discounted SMOG mica plates
INTERESTING FACTS ABOUT MUCA
August 1689 is considered to be the starting point of the mica industry in the Mamsko-Chuysky region, when the Yakut governor Zinoviev issued the Cossack Afanasy Pushchin with a “Mandatory Memory”, to which he was obliged.” find and harvest mica along the Vitim River. »
If mica is added to concrete, this will dramatically increase its strength, while reducing heat and sound conductivity.
Muscovite mica is transparent and has a glassy luster. Phlogopite is usually a dark mica, visible only in thin sheets.
In the middle of the 20th century, the price of sheet mica varied from 50 to 1000 kopecks per sheet. For comparison, foreign merchants of that time paid 16 rubles for 1 squirrels, and XNUMX ruble for a pound of black caviar.
For the first time, synthetic mica, fluorphlogopite, was obtained by the Russian scientist K.D. Khrushchev in 1887. Artificial mica is almost transparent and is superior to natural mica in a number of characteristics.
Mica plates are also widely used as a design material. Thus, mica is used for fireplace screens, creating a decorative effect and at the same time protecting against high temperatures.
Muscovite is a strategic raw material, used in 22 areas, “from cosmetics to space.”
One of the largest muscovite crystals in history was found in Canada. Its size was 1,95×2,85×0,6 m and it weighed about 7 tons.
In Russia at the beginning of the 21st century, a paradoxical situation has arisen: a power that has enormous mica resources is forced to buy it abroad, since there is practically no domestic mining. History is cyclical: an absolutely identical situation was observed at the beginning of the last century.
In accordance with the spectral classification of asteroids, a rather rare type of carbon asteroids of class G is distinguished. It is believed that these asteroids are mainly composed of low-temperature hydrated silicates such as mica and clay with an admixture of carbon or organic compounds.
In the 18th century, mica occupied an important place at the annual Irkutsk fairs along with traditional Siberian goods – furs, leather, silver. Here it was purchased by Russian merchants and exported to Moscow.
The heat resistance of muscovite, i.e. the temperature at which it retains its properties, reaches 700 degrees Celsius. For comparison, the melting point of aluminum is 660 degrees, lead – 327, silver – 962.
Neither the ancient Greeks nor the Romans were familiar with mica. In scientific treatises of Western Europe, mica began to be called “Vitrum Moscoviticum”, i.e. glass of Muscovy. Later the name was simplified, it became shorter “muscovite” and, finally, in mineralogy it became stronger as “muscovite”
Mica belongs to the electrical insulating materials of the highest class of heat resistance: when heated to several hundred degrees, it retains its electrical properties.
The chemical composition of mica reaches 40 elements. Moreover, sharp fluctuations in the chemical composition are observed even in micas from the same deposit and, often, from the same crystal.
The second half of the 18th century was marked by successes in glass production and a decrease in its price. This led to a fall in demand for mica and a reduction in its production. However, the windows of warships continued to be made of mica, since glass ones could not withstand gun salvos.
During the time of Peter I, there was a great demand for mica (“Moscow glass”) from Western Europe and America, used for the windows of warships, which was satisfied mainly by Mamskaya mica.
Muscovite mica has high chemical resistance. Hydrochloric acid does not decompose it when heated to 300 degrees Celsius. It is also not susceptible to alkalis.
During the Great Patriotic War, the demand for high-quality mica used in the defense industry increased sharply. Mica was in acute shortage: the Karelian deposits were captured by the enemy, Biryusinskoe was depleted. All muscovite mining was carried out only at the Mamsko-Chuyskoye deposit.
The word “mica” (“sluda”) is originally Russian. Since ancient times, the meaning of the expression “sludiatsya” meant “to layer.” The word “slada” was first mentioned in the “Ostromir Gospel” (1057)
In the ancient Indian city of Teotihuacan in Mexico, a strange structure called the “Mica Temple” was discovered. Similar structures have not been found anywhere else in the world. Its uniqueness lies in the fact that the structure on top is covered with a double layer of muscovite mica, the purpose of which is still unknown.
Mica is one of the most common minerals in the earth’s crust. In ordinary rocks it occurs in the form of tiny flakes. Industrial deposits where crystals reach large sizes are extremely rare.
The name of the variety of mica “vermiculite” comes from the Latin word “worm”, because when heated it forms long worm-like columns and ropes.
The yield of finished mica sheet products from mined raw materials averages 8,25%. This leads to a fairly high price for products and their shortage.
Mica, having high dielectric properties, significant heat resistance, and the ability to split into thin sheets, is an unsurpassed electrical insulating material widely used in radio engineering.
© 2010—2024, Silicate LLC Articles
Mica is a family of widespread rock minerals that are of industrial importance. The most common are muscovite, biotite, phlogopite, lepidolite.
The use of mica, primarily muscovite, in industry is based on the unique properties of this mineral. A characteristic feature of micas is their very perfect cleavage, which makes it easy to split them into thin plates. The main properties of plates obtained from muscovite: great flexibility and elasticity, high specific volume and surface electrical resistance and other dielectric properties, good compressive and tensile strength, high thermal resistance, including in a radiation field, very low hygroscopicity.
Muscovite, in addition, is the most resistant to acids and alkalis, and has selective permeability to waves of the infrared and ultraviolet spectra. For muscovite, the mechanical properties of mica packets are greatly influenced by various defects found in natural crystals: fracturing, clamping, splintering, wedge-shape, wrinkling, gas inclusions, etc.
Mica sheets (plates) are consumed primarily in the electrical and electronics industry in the production of high-quality electrical insulating materials. It is used for the manufacture of high-quality capacitors, transmitting circuits, blocking devices, used in equipment for aviation and rocket technology, radar stations, high-temperature transformers, for the manufacture of viewing windows for high-pressure boilers and other tanks, in medical equipment, and in laser devices.
Non-leaf muscovite (small-sized) together with mine and factory scrap is crushed from sizes of 1,5 square meters. cm to microns. Depending on the purpose, dry and wet grinding are used. The main areas of application of ground mica are the production of welding electrodes, composites and paints and varnishes. Wet-ground muscovite has a number of properties that are important for the paint, wallpaper, and cosmetics industries, as well as for special technology in the production of polymers and pigments.
- History of mica mining in Russia
- Mica fishing in old Russia
- Mica industry after the revolution
- Current state of mica mining in Russia
- Traces of mica. Who found them on Mama
- Mica factories in Russia
- Mamsko-Chuiskoye field
- Main mica-bearing regions of Russia
- Application of mica
- Mineralogical characteristics
- Chemical composition and chemical properties
- What is mica
- Types of mica
- What is PSMA
- Mica plates
- Mica for microwave ovens
- Mica phlogopite
- Lepidolite
- Vermiculite
- Mica CO
- Brief information about mica
- Types and uses of mica
- What is muscovite
- Mica products
- Properties of mica
- Properties of muscovite
- SMOG mica plates
- Muscovite in the Irkutsk region
- SMOE
- SMOP
- SMOSH
- Muscovite
- Buy mica
- Mica plates
- Mica factory of the Siberian Minerals company
- Mica
- Mica mining
- Mica factory
- Mica microwave
- Mica plates
- Mica muscovite
- Buy mica
- Mica mining
- Mica muscovite
- SMOSH
- PSMA
- Mica mining
- Where to buy mica?
- SMOSH (cut muscovite mica for brush holders)
- Mica microwave
- SMGP (muscovite mica for generator devices)
- Capacitor mica
- Muscovite
- Mica SF (filter mica)
- GOST 13751-86
- Buy mica
- Where to buy mica?
- Mica SMOE
- Mica SMGP
- Mica SMOSCH
- Mica CO
- How is mica mined?
- What is muscovite?
- What is capacitor mica?
- What is SMOE?
- What is microwave mica?
- Where is the best place to buy mica?
- Mica SMOG
- Mica SMA
- Mica factory of the Siberian Minerals company
- Mica plates
- Where can I buy mica at a profit?
- Mica mining in the Irkutsk region
- Mica capacitor
- Protective mica
- Mica SMOP
- Where to buy mica in the Irkutsk region?
- Mica mining in the Irkutsk region
- Mica SMGP
- Mica VLF
- Mica cut
- Mica mining in the Irkutsk region
- Where to buy mica and mica products?
- Production of mica SMOE
- Mica production SMOSCH
- Microwave mica production
- Where can you buy mica?
- Production of mica SK (mica for valves)
- Mica production SMGP
- Where is it profitable to buy muscovite?
- Where is it profitable to buy cut mica?
- Where can you buy mica in bulk?
- Mica mining in the Irkutsk region
- Where can I buy capacitor mica?
- Where can I buy protective mica?
- Where can I buy SMOP mica?
- Muscovite and its scope
- Where is it profitable to buy SMOE mica?
- Where is it profitable to buy mica SMOSH?
- Where is it profitable to buy microwave mica?
- GOST 13751-86
- Sale of mica from the company “Siberian Minerals”
- Mica mining in the Irkutsk region
- Where can I buy mica SMGP?
- Where is the best place to buy mica parts?
- GOST 13752-86
- Where can I buy mica at a profit?
- Mica SSP
- Mica VLF
- Mica CO
- Mica CP
- Mica mining in the Irkutsk region
- Mica grade SMOP
- Where can I buy cut mica?
- Where are mica plates used?
- Where is it profitable to buy capacitor mica?
- Muscovite mining in the Irkutsk region
- Mica SMOE and its scope of application
- Mica SMOSCH and its scope of application
- Microwave mica and its scope of application
- Where to buy mica on favorable terms?
- Mica mining and sale
- Mica PSMA and scope of its application
- Mica SEP and its scope
- Mica SPM and its scope of application
- Mica SMA and its scope of application
- Where can you buy mica in bulk?
- Mica SZ and its scope of application
- VLF mica and its scope of application
- Mica CO and its scope of application
- Spacer mica and its scope of application
- How is mica mined?
- What is capacitor mica used for?
- Where can I buy cut mica wholesale?
- Where are mica plates used?
- Where is it profitable to buy SMOP mica?
- Where can you buy mica in bulk?
- Where is it profitable to buy SMOE mica?
- Where is it profitable to buy SMGP mica?
- Where is it profitable to buy microwave mica?
- What is muscovite and where is it used?
- Sales of mica from the manufacturer
- Where to buy mica SMOSH?
- Where to buy mica SMA?
- Where to buy SEP mica?
- Where to buy mica SPM?
- Properties and scope of application of spacer mica
- Properties and scope of application of mica SK
- Properties and scope of application of mica CO
- Properties and scope of application of VLF mica
- Properties and scope of application of mica SZ
- Mica mining in the Irkutsk region
- Where can I order mica products?
- Where can I order mica plates?
- What is cut mica used for?
- What is microwave mica used for?
- Where can I buy mica on favorable terms?
- What is muscovite and where is it used?
- Where can I order mica SMGP?
- Where can I order SMOE mica?
- What is SMOSH mica used for?
- What is SPM mica used for?
- What is VLF mica used for?
- What is mica CO used for?
- What is SZ mica used for?
- Where is it profitable to buy cut mica?
- Where is it profitable to buy spacer mica?
- Where can I order mica SEP?
- Where can I order SMA mica?
- Where can I order mica SK?
- Where can I buy muscovite at a profit?
- Where is it profitable to order mica products?
- Where is it profitable to order mica plates?
- Where to buy capacitor mica?
- Where can I buy microwave mica?
- Properties and purpose of capacitor mica
- Properties and purpose of mica SPM
- Properties and purpose of VLF mica
- Properties and purpose of mica CO
- Properties and purpose of mica SZ
- Crystal structure
- Mica hardness
- Heat resistance
- Swelling and water release
- Thermal conductivity
- Electrical Conductivity
- Electrical strength
- double refraction
- Shine, transparency of micas
- Density
- Hygroscopicity, water absorption
- Crystal surface microrelief
- Electrification of crystals and splitting work
- Secondary bonds in a split crystal
- Molecular water and thermal pinch
- Shear force anisotropy
- Defective cut edge
- Types of deposits
- Search and exploration of mica-bearing bodies
- Deposit sampling
- GOST 13752-86
- GOST 13751-86
- GOST 18096-87
- TU 5724-025-00281944-01
- GOST 13753-86
- GOST 13750-88
- GOST 7134-82
- GOST compliance
- Muscovite
- Mica mining
- Mica deposit in Russia
- Applications of mica insulation
- Mica spacer
- Mica parts
- Mica plates
- Mica cut
- Characteristics and history of mica mining
- Production of mica products by Siberian Minerals company
- Types of mica and their purpose
- Properties of mica for attenuators
- Properties of mica for vacuum devices
Discounted SMOG mica plates
INTERESTING FACTS ABOUT MUCA
In the 18th century, mica occupied an important place at the annual Irkutsk fairs along with traditional Siberian goods – furs, leather, silver. Here it was purchased by Russian merchants and exported to Moscow.
In accordance with the spectral classification of asteroids, a rather rare type of carbon asteroids of class G is distinguished. It is believed that these asteroids are mainly composed of low-temperature hydrated silicates such as mica and clay with an admixture of carbon or organic compounds.
The word “mica” (“sluda”) is originally Russian. Since ancient times, the meaning of the expression “sludiatsya” meant “to layer.” The word “slada” was first mentioned in the “Ostromir Gospel” (1057)
Muscovite mica is transparent and has a glassy luster. Phlogopite is usually a dark mica, visible only in thin sheets.
August 1689 is considered to be the starting point of the mica industry in the Mamsko-Chuysky region, when the Yakut governor Zinoviev issued the Cossack Afanasy Pushchin with a “Mandatory Memory”, to which he was obliged.” find and harvest mica along the Vitim River. »
Neither the ancient Greeks nor the Romans were familiar with mica. In scientific treatises of Western Europe, mica began to be called “Vitrum Moscoviticum”, i.e. glass of Muscovy. Later the name was simplified, it became shorter “muscovite” and, finally, in mineralogy it became stronger as “muscovite”
In the ancient Indian city of Teotihuacan in Mexico, a strange structure called the “Mica Temple” was discovered. Similar structures have not been found anywhere else in the world. Its uniqueness lies in the fact that the structure on top is covered with a double layer of muscovite mica, the purpose of which is still unknown.
The chemical composition of mica reaches 40 elements. Moreover, sharp fluctuations in the chemical composition are observed even in micas from the same deposit and, often, from the same crystal.
For the first time, synthetic mica, fluorphlogopite, was obtained by the Russian scientist K.D. Khrushchev in 1887. Artificial mica is almost transparent and is superior to natural mica in a number of characteristics.
Mica, having high dielectric properties, significant heat resistance, and the ability to split into thin sheets, is an unsurpassed electrical insulating material widely used in radio engineering.
Mica plates are also widely used as a design material. Thus, mica is used for fireplace screens, creating a decorative effect and at the same time protecting against high temperatures.
One of the largest muscovite crystals in history was found in Canada. Its size was 1,95×2,85×0,6 m and it weighed about 7 tons.
Muscovite mica has high chemical resistance. Hydrochloric acid does not decompose it when heated to 300 degrees Celsius. It is also not susceptible to alkalis.
If mica is added to concrete, this will dramatically increase its strength, while reducing heat and sound conductivity.
Mica belongs to the electrical insulating materials of the highest class of heat resistance: when heated to several hundred degrees, it retains its electrical properties.
In Russia at the beginning of the 21st century, a paradoxical situation has arisen: a power that has enormous mica resources is forced to buy it abroad, since there is practically no domestic mining. History is cyclical: an absolutely identical situation was observed at the beginning of the last century.
During the time of Peter I, there was a great demand for mica (“Moscow glass”) from Western Europe and America, used for the windows of warships, which was satisfied mainly by Mamskaya mica.
Muscovite is a strategic raw material, used in 22 areas, “from cosmetics to space.”
In the middle of the 20th century, the price of sheet mica varied from 50 to 1000 kopecks per sheet. For comparison, foreign merchants of that time paid 16 rubles for 1 squirrels, and XNUMX ruble for a pound of black caviar.
The name of the variety of mica “vermiculite” comes from the Latin word “worm”, because when heated it forms long worm-like columns and ropes.
Mica is one of the most common minerals in the earth’s crust. In ordinary rocks it occurs in the form of tiny flakes. Industrial deposits where crystals reach large sizes are extremely rare.
During the Great Patriotic War, the demand for high-quality mica used in the defense industry increased sharply. Mica was in acute shortage: the Karelian deposits were captured by the enemy, Biryusinskoe was depleted. All muscovite mining was carried out only at the Mamsko-Chuyskoye deposit.
The yield of finished mica sheet products from mined raw materials averages 8,25%. This leads to a fairly high price for products and their shortage.
The heat resistance of muscovite, i.e. the temperature at which it retains its properties, reaches 700 degrees Celsius. For comparison, the melting point of aluminum is 660 degrees, lead – 327, silver – 962.
The second half of the 18th century was marked by successes in glass production and a decrease in its price. This led to a fall in demand for mica and a reduction in its production. However, the windows of warships continued to be made of mica, since glass ones could not withstand gun salvos.
© 2010—2024, Silicate LLC Articles
