What is the density of silicon carbide? What are the physical properties of silicon carbide?

Emery. Also known as silicon carbide.

sic), the density is.

is made of quartz sand.

Petroleum coke (or coal coke), wood chips (salt is added to produce green silicon carbide) and other raw materials are smelted at high temperature through resistance furnaces.

Silicon carbide is also found in nature with a rare mineral, moissanite.

Silicon carbide is also known as moissanite. Among the contemporary non-oxide high-tech refractory raw materials such as C, N, and B, silicon carbide is the most widely used and economical one, which can be called gold steel sand or refractory sand. At present, China's industrial silicon carbide is divided into black silicon carbide and green silicon carbide, both of which are hexagonal crystals, with a specific gravity of 2840 3320kg mm2.

Black silicon carbide is black, the microscopic shape is hexagonal crystal, the Mohs hardness of silicon carbide is, the microdensity hardness is 3000-3300 kg mm, the density is generally considered to be gram millimeter 3, the natural bulk density of silicon carbide abrasive is between gram millimeter 3, and the specific gravity is.

Silicon carbide. Silicon carbide melting point 2700

The boiling point is above 3500

The microhardness is 2840 3320kg mm2

The hardness is between corundum and diamond, and the hardness is greater than that of silica.

Bulk density (g cm3) content (%)85, Mohs hardness grade 9.

SiC content (%)85

Water absorption (%)6

Bulk density (g cm3).

Operating temperature ( ) 40 450

Flexural strength at room temperature (MPa) 29

Compressive strength (mpa) 100

Mohs hardness grade 9.

Green silicon carbide abrasive is a gray-green powder, which is brittle, high purity, and coarse particles, which is suitable for coarse grinding and pre-processing of glass. It comes in a variety of models. Depending on your needs, you can choose the appropriate specifications.

Performance characteristics: The manufacturing method of green silicon carbide is the same as that of black silicon carbide, but the raw material composition is slightly different. It is green and translucent. Slightly brittler than black silicon carbide, but with high purity.

Usage: Green silicon carbide is used to process hard and brittle materials. It can also be used to manufacture high-grade refractory materials, silicon carbon rods and radio equipment.

Product name: Green Silicon Carbide.

Codename: GC

Product description: The production method of green silicon carbide is basically the same as that of black silicon carbide, it is a green translucent crystal, high purity, brittleness, and the abrasives made of it are suitable for processing materials with high hardness and brittleness, such as cemented carbide, glass, agate, etc. Green silicon carbide is also used as a high-grade refractory material, electric heating element and electrical component, etc.

Silicon carbide has physical properties such as high hardness and low coefficient of thermal expansion.

Mohs hardness. Wechsler hardness 2800-3300

1. Particle size distribution.

a. Granular sand.

China's national standard GB GB is equivalent to Europe's FEPA and.

ANSI of the United StatesStandard.

b. All kinds of refractory sand and segment sand have different particle sizes.

distribution, generally processed according to the customer's requirements.

2. Particle bulk density.

The bulk density of granular sand, refractory sand and the pile of segment sand.

The bulk density is processed according to the customer's requirements.

1. Thermal conductivity and linear expansion coefficient of silicon carbide.

As a refractory material, carbonized bricks have superior thermal shock resistance. This is reflected in its high thermal conductivity (thermal conductivity) and low coefficient of linear expansion. In general engineering calculations, the thermal conductivity of silicon carbide is as follows.

This value is about 4 times the thermal conductivity of corundum. In the range of 25 1400, the flat expansion coefficient of silicon carbide is desirable; The linear expansion coefficient of corundum is (7 8) l0-6k-1.

2. Conductivity of silicon carbide.

Silicon carbide is a semiconductor, and its conductivity varies with the type and number of impurities introduced into the crystal, and the resistivity is between 10-2-1012 ·cm. Among them, the impurities that have a greater impact on the conductivity of silicon carbide are aluminum, nitrogen and boron, and the conductivity of silicon carbide with more aluminum is significantly increased. The conductivity of silicon carbide increases rapidly with the increase of electric field strength, and has the characteristics of nonlinear change.

This characteristic of silicon carbide is used in the manufacture of surge arrester valves.

3. Resistivity of silicon carbide.

The resistivity of silicon carbide changes with temperature, but it is contrary to the resistance temperature characteristics of metals within a certain temperature range. The resistivity of silicon carbide is more complex in relation to temperature. The conductivity of silicon carbide peaks when the temperature rises to a certain value, and if the temperature continues to increase, the conductivity will decrease again.

Most of the applications of silicon carbide in many fields are the application of its five types of products, namely advanced ceramics, refractory materials, abrasives, semiconductor devices and metallurgical raw materials.

1. Mechanical properties: High hardness (K-hardness is 3000kg mm2), can cut rubies; High wear resistance, second only to diamond.

2. Thermal properties:The thermal conductivity exceeds that of metal copper, which is 3 times that of Si and 8 to 10 times that of Gaas, and has good heat dissipation performance, which is very important for high-power devices. SiC has high thermal stability, and it is impossible to melt SiC at atmospheric pressure.

3. Chemical properties:It is very resistant to corrosion and is resistant to almost any known corrosive agent at room temperature. The surface of the SiC is easy to oxidize to form a thin layer of SiO2, which can prevent its further oxidation, and at higher than 1700, this oxide film melts and rapidly undergoes oxidation reaction.

4. Electrical performance:The bandgap between 4H-SiC and 6H-SiC is about 3 times that of Si and 2 times that of GaAs. The breakdown electric field strength is an order of magnitude higher than that of Si, and the saturation electron drift velocity is times that of Si. The bandgap of 4H-SiC is wider than that of 6H-SiC.

The following table shows a comparison of the properties of several semiconductor materials.

Characteristics of silicon carbide:

In silicon carbide, the average bond energy between Si-C is 3000kJ mol, due to the strong covalent bond structure, silicon carbide has many excellent properties, such as high temperature resistance, high hardness, high strength, low thermal expansion coefficient, excellent thermal shock resistance, high thermal conductivity, creep resistance and chemical stability.

At high temperature (no more than 1600), the strength of silicon carbide is almost not reduced, and it can maintain good bonding strength, which is suitable for some industrial fields with harsh conditions such as high pressure and high temperature, wear, radiation, corrosion, etc. Silicon carbide can be used as a raw material in the preparation of functional ceramics and advanced refractories, as a raw material in the metallurgical industry, and can also be used as an abrasive.

The above content refers to Encyclopedia - Silicon Carbide.

Silicon carbide is a very hard ceramic material with high wear resistance, corrosion resistance and high temperature stability. It has the following features and uses:

High hardness: Silicon carbide is a very hard material, close to diamond in hardness. As a result, it can be used to make cutting tools, grinding heads, sandpaper, and abrasives, among others.

High abrasion resistance: Silicon carbide is very wear-resistant and maintains stability even at high temperatures and in harsh environments. It is widely used in the manufacture of mechanical seals, thermocouplers, automotive parts, and high-temperature ceramics.

High temperature stability: Silicon carbide can maintain stability in extreme high temperatures, with high thermal conductivity and thermal shock properties. Therefore, it is widely used in high-temperature molten metal treatment, rocket engine manufacturing, Gaolaling Songwen kiln, etc.

Corrosion resistance: Silicon carbide has good corrosion resistance and can resist most chemical corrosion and oxidation. As a result, it is widely used in chemical reactors, oil and gas extraction, power and other industries.

Overall, silicon carbide has many excellent physical and chemical properties and can be widely used in manufacturing, industry and science.

Silicon carbide has excellent acid resistance, temperature resistance, corrosion resistance, high thermal and electrical insulation, so it is widely used in metallurgical chemistry, mainly used in resistive high-temperature material smelting, analgesics, ceramic glazes and other industries. In addition, it can also be used for high-strength heat-resistant materials in the fields of flight rocket engine components, refrigeration technology, electronic components, gas separation technology, aviation insulation materials, etc.

Silicon carbide has excellent high temperature resistance, up to 3000, and has good chemical resistance, electrical insulation and sealing properties. It is mainly used in the manufacture of various high-temperature resistant materials, such as the production of spacecraft shells, base macro engine parts, military equipment and various functional materials in the electronics industry. Imitation book.

Properties of silicon carbide:

1. The high-grade refractory material used to make it is resistant to thermal shock, small in size, light in weight and high in strength.

2. Low-grade silicon carbide (containing about 85% of SiC) is an excellent deoxidizer, which can speed up steelmaking, facilitate the control of chemical composition, and improve the quality of steel.

3. Silicon carbide is also widely used to make silicon carbon rods for electric heating elements. The screening and drying of existing silicon carbide are troublesome, and they are limited in mass production.

4. Secondary silicon carbide is an excellent deoxidizer, which can speed up steelmaking, and facilitate the control of chemical composition and improve the quality of steel. In addition, silicon carbide powder is also used in a large number of bridges to make silicon carbon rods for electric heating elements.

5. Green silicon carbide powder is a filler and a good raw material for making non-metallic substances, which is often used for grinding cemented carbide and hard and brittle metals and non-metallic materials, such as copper, brass, aluminum and magnesium and other non-ferrous metals and gemstones.

6. Green silicon carbide powder is processed from silicon carbide, which has stable chemical properties, high thermal conductivity, small thermal expansion coefficient and good wear resistance.

Uses of silicon carbide:

1. Main use: used for wire cutting of 3-12 inch monocrystalline silicon, polycrystalline silicon, potassium arsenide xiangbu, quartz crystal, etc. Solar photovoltaic industry, semiconductor industry, piezoelectric crystal industry engineering processing materials.

2. Used in semiconductors, lightning rods, circuit components, high-temperature applications, ultraviolet light detectors, structural materials, astronomy, disc brakes, clutches, diesel particulate filters, filament pyrometers, ceramic films, cutting tools, heating elements, jewelry, steel, protective gear, catalyst bearers and other fields.

3. It is mainly used for grinding and polishing grinding wheels, sandpaper, abrasive belts, oil stones, grinding blocks, grinding heads, grinding pastes and monocrystalline silicon, polycrystalline silicon in photovoltaic products and piezoelectric crystals in the electronics industry.

Emery is also known as silicon carbide (SiC), and the density is.

It is made of quartz sand, petroleum coke (or coal coke), hail, sawdust (salt needs to be added when producing green silicon carbide) and other raw materials through a resistance furnace at high temperature.

Silicon carbide is also found in nature with a rare mineral, moissanite. Silicon carbide is also known as moissanite. Among the contemporary non-oxide high-tech refractory raw materials such as C, N, and B, silicon carbide is the most widely used and economical one-of-a-kind refractory, which can be called gold steel sand or refractory sand.

At present, China's industrial silicon carbide is divided into black silicon carbide and green silicon carbide, both of which are hexagonal crystals, with a specific gravity of 2840 3320kg mm2.

Hello, it is a pleasure to serve you and give you the following answer: the specific gravity of silicon carbide can be calculated by the gravimetric method, that is, a certain amount of silicon carbide can be put into a container of a certain capacity, and then the weight of silicon carbide in the container is measured, and then divided by the capacity of the container, you can get the specific gravity of silicon carbide. The reason for the problem may be due to the inaccurate capacity of the container, or the Qiqing weight measurement of the silicon carbide is not accurate, or the silicon carbide in the container is not completely full, and so on.

Workaround and practice steps:1First of all, to ensure that the container capacity is accurate, you can use a standard container, or use a tool such as a measuring cup to measure the volume of the container.

2.Secondly, to ensure that the weight measurement of silicon carbide is accurate, a precision weighing instrument can be used to measure the weight of silicon carbide. 3.

Finally, to ensure that the silicon carbide in the container is full, you can use a stirrer to stir the silicon carbide evenly to ensure that the silicon carbide in the container is full. Personal tip: When measuring the specific gravity of the silicon carbide cluster, make sure that the capacity of the container is accurate, the weight of the silicon carbide is measured accurately, and the silicon carbide in the container is full to ensure that the measurement results are accurate.