Name: Black Carborundum
Brand: JIASHIKE
SKU: 233263552

Company Profile

Anyang Jiashike Metal Co.,LTD,as the leading manufacturer of ferroalloy materials in China.It is a comprehensive enterprise integrating scientific research, processing and production, and import and export trade.It has more than 20 years of experience in the professional field and uses advanced technology and professional equipment. , produces high-quality metals and alloys, and its business scope involves metallic silicon, ferrosilicon, silicon-calcium alloy, silicon-carbon alloy, natural graphite powder and other products.

Company advantages

Rich Experience

Our company has many years of production work experience. The concept of customer-oriented and win-win cooperation makes the company more mature and stronger.

Advanced Equipment

Equipment based on the latest technological developments has higher efficiency, better performance and stronger reliability.

Competitive Price

We have professional sourcing team and cost accounting team, stive to reduce cost and profit and provide you a good price.

Quality Control

We have built a professional QC team to accurately inspect every raw material and every process of production.

Customized High Purity Si 2202 3303 411 551 553 Silicon Metal

One of the advantages of metal silicon 3303 is its use in making specialty steel, as it can improve the steel's strength, hardness, and ductility. In addition, metal silicon 3303 is often used as an additive to aluminum alloys to improve their mechanical properties, such as their corrosion.

Calcium Silicon Alloy

Silica-calcium alloy is a composite alloy composed of silicon, calcium and iron, which is an ideal compound deoxidizer and desulfurizer. It is widely used in the production of low carbon steel, stainless steel and other steel grades and special alloys such as nickel base alloy and titanium base alloy. It is suitable to be used as a warming agent for converter steelmaking workshop. It can also be used as inoculant of cast iron and additive in ductile iron production.

High Quality Ferro Silicon/ Ferrosilicon For Steelmaking/FeSi65

Ferro Silicon or Ferrosilicon is a crucial element when it comes to steelmaking. It is an alloy composed of iron, silicon, and a small percentage of aluminum and other elements. The high-quality Ferro Silicon, also known as FeSi65, is especially crucial in the steelmaking industry as it contains a higher percentage of silicon.

Magnesium Ingot

Magnesium ingot alloy material is a lightweight and high-strength material that is widely used in various industries. The material is composed of magnesium and other metals, such as aluminum, zinc, manganese, and silicon, which improve its mechanical properties and corrosion resistance.

Metal Alloy Silicon Calcium Alloy Ferro Silicon Calcium/Fesica

CaSi alloy is the compound alloy which is composed by silicon, calcium and ferrum. It's an ideal compound deoxidizer and desulfurizer which can be widely used in the production of steels such as high-quality steel, low-carbon steel, stainless steel and special alloys such as nickel base alloy, titanium base alloy. CaSi alloy can also be applied as the heat-raiser for converter steelmaking, the inoculant for cast iron production and addictive for nodular cast iron production.

Use Of High Quality Silicon Calcium Alloy /CaSi

Use Of High Quality Silicon Calcium Alloy 100 Words/CaSi

Factory Direct Sales Of High Quality Silicon Calcium Alloy

Factory Sale Casting Iron Use Casi Powder Calcium Silicon Alloy 30/60 28/55

Factory Direct Sales Of High Quality Metal Silicon/Silicon Metal441

Factory Direct Sales Of High Quality Metal Silicon/Ferro Silicon441

Ferro Silicon 441 Ferro Silicon 441 is JSK`s hot product,Ferro Silicon grade 441, with a silicon content of 99%. The contents of iron, aluminum, and calcium are 0.4%, 0.4%, and 0.1%.

What is Black Carborundum

Black Carborundum, exceedingly hard, synthetically produced crystalline compound of silicon and carbon. Its chemical formula is SiC. Since the late 19th century Black Carborundum has been an important material for sandpapers, grinding wheels, and cutting tools. More recently, it has found application in refractory linings and heating elements for industrial furnaces, in wear-resistant parts for pumps and rocket engines, and in semiconducting substrates for light-emitting diodes.

Benefits of Black Carborundum

Excellent high-temperature performance

The melting point of Black Carborundum products is as high as 2700°C, which can maintain its structural stability and strength in high-temperature environments, so it is widely used in high-temperature molten metals, high-temperature heating furnaces, high-temperature petrochemical and other fields.

Strong corrosion resistance

Black Carborundum has excellent corrosion resistance and can work stably for a long time in acid, alkali and oxidative environments.

High hardness and high strength

Black Carborundum has higher hardness and strength than traditional ceramic materials, so it has good wear resistance and impact resistance.

Excellent thermal conductivity and electrical conductivity

Black Carborundum has high thermal conductivity and excellent electrical conductivity, so it is widely used in the manufacture of high-power electronic components and radiators.

What are the Applications of Black Carborundum

Black Carborundum Used in Military Bulletproof Armor
Black Carborundum is used to manufacture bulletproof armor. The property of this compound that makes it to be applied for such a purpose is its hardness. Bullets and other harmful objects will have to contend with the hard ceramic blocks that Black Carborundum forms. Bullets can't penetrate the ceramic blocks.

Black Carborundum Used in Semiconductors
Black Carborundum becomes a semiconductor when dopants are added to it. Dopants like boron and aluminum added to Black Carborundum make it become a p-type semiconductor. On the other hand, dopants such as nitrogen and phosphorus added to Black Carborundum make it become an n-type semiconductor. You can read this post for more information about the differences between p-type semiconductors & n-type semiconductors.

Black Carborundum Used in Abrasives
Black Carborundum is commonly used as an abrasive because of how hard it is. It is used in the manufacture of grinding wheels, cutting tools, and sandpaper. Black Carborundum abrasives are usually cheaper than other abrasives of similar quality. The abrasives are used to grind materials such as steel, aluminum, cast iron, and rubber.

Black Carborundum Used in Electric Vehicles
Black Carborundum is a better choice over silicon for powering electric vehicles. Electric vehicles powered by Black Carborundum are highly efficient and cost-effective. At present, many well-known companies have used Black Carborundum to improve efficiency and range when manufacturing electric vehicles, such as Tesla.

Black Carborundum Used in Jewelry
Structurally similar to diamond, yet more lustrous, cheaper, more durable, and lighter than diamond, Black Carborundum is a well-deserved alternative to diamond in the jewelry industry.

Properties of SiC

Polytypism of SiC
SiC is known for its polytypism (different crystalline structures), generated by the stacking of Si and C along the principal axis (C-axis). The AaBbCcAaBbCc stacking generates a 3C-SiC zinc-blende lattice, AaBbAaBb generates 2H-SiC with a wurtzite lattice, and AaBbAaCcAaBbAaC generates a 4H-SiC lattice. Different crystalline forms with varying numbers of atoms per unit cell affect the physical properties of polytypes owing to the varying electronic energy bands and vibrational branches.

Band Structure
Different crystalline forms of SiC have varying bandgap sizes, ranging from 2.4 eV (3C-SiC) to 3.35 eV (2H-SiC), which are crucial for determining their electronic and optical properties. SiC polytypes are indirect semiconductors, which means that the polytype with the smallest bandgap (3C-SiC ) to that with the largest bandgap (2H-SiC) requires the participation of phonons (quantized vibrational modes). Although SiC polytypes are indirect semiconductors, they are excellent candidates for power applications.

Doping
Doping is a physical method used to obtain the desired electrical properties of SiC. In this process, an element, either an acceptor (aluminum/boron/gallium) or a donor (nitrogen/phosphorus), is introduced at the crystal growth stage to alter its conductivity. Since diffusion is not a feasible method to dope SiC, ion implantation with dopant activation via high-temperature heating is used to dope SiC. Previous studies reported the success of doping SiC with nitrogen for applications such as reducing power loss in vertical power device structures and high-frequency applications.

Electrical Properties
Unintentional doping with nitrogen donors during the growth process indicates that they have excess electrons during the growth process, revealing n-type conductivity in SiC. Doped nitrogen atoms replace carbon atoms at lattice sites, varying the ionization energies owing to differing local environments and a specific interference effect. Furthermore, Hall measurements help determine the concentration of nitrogen donors, assuming an equal distribution among various lattice sites.

Chemical Stability
SiC undergoes facile oxidation and forms a silicon dioxide (SiO2) film, which gradually hinders the oxidation process. However, if substances that can remove or break the silicon dioxide film exist simultaneously, SiC can be oxidized further. SiC does not easily dissolve in acids or bases but can be easily attacked by alkaline melts. The primary impurities found in SiC include C and SiO2 and the amount of impurities varies depending on the product type.

Preparation of Black Carborundum

Acheson process

Black Carborundum is present in the mineral moissanite but is uncommon in nature. It is synthesized using the Acheson process, named after its inventor, Edward G. Acheson. In this process, pure silica (SiO2) quartz sand, and finely ground petroleum coke (carbon) are combined and heated to an increased temperature of roughly 1700 to 2500°C in an electric resistive furnace. The main chemical reaction that results in the creation of ɑ-SiC is shown below.

Lely method

Sublimation is used in the Lely method to generate bulk Black Carborundum crystals. Black Carborundum powder is put into a graphite crucible that has been purged with argon gas and heated to about 2,500 °C (4,530 °F). The Black Carborundum on the crucible's outer walls sublimes and deposits on a graphite rod towards the crucible's center, which is at a lower temperature.

Chemical vapor deposition method

Small-scale production of Black Carborundum can also occur from the breakdown of gaseous or volatile molecules containing silicon and carbon in an inert atmosphere. The reaction products then deposit the carbide onto an appropriate heated substrate.

Black Carborundum Manufacturing Process

Powder preparation
Black Carborundum (SiC) is a compound of silicon and carbon with a chemical formula of SiC. The simplest manufacturing process for producing Black Carborundum is to combine silica sand and carbon in an Acheson graphite electric resistance furnace at a high temperature, between 1600°C (2910°F) and 2500°C (4530°F). Fine silicon particles can be converted to Black Carborundum (SiC) by heating in the excess carbon from the organic material. The silica fume, which is a byproduct of producing silicon metal and ferrosilicon alloys, also can be converted to SiC by heating it with graphite at 1500°C (2730°F). The material formed in the Acheson furnace varies in purity. The Black Carborundum "stones" and grains are turned into a fine powder by crushing, and then purified with halogens.

Kneading
The fine grain (sub-micron) powder is then homogeneously mixed with non-oxide sintering aids (a binder) to form a paste. Different binders including organosilicon binders may be used.

Shape forming
The resulting pasty mixture may be compacted and shaped either by extrusion or by cold isostatic pressing.Extrusion consists in forcing the pasty mixture through a die with an opening. Black Carborundum tubes are produced through extrusion. The properties in the extrusion direction differ from the properties in other directions.

Computer Numerical Control (CNC) Machining
CNC machining is used to machine the surface of the plates or drill the holes on process and services sides in the cylindrical blocks. Due to the very low mechanical strength of the green material, special care is required here. With the help of unique fixture, the components are turned, milled, and drilled according to specific machining parameters.

Sintering
Following the forming stage, the material is sintered in an inert atmosphere at temperatures up to 2300°C (4170°F). During the sintering process, and more precisely between approximately 1900°C (3450°F) and 2150°C (3900°F), the products shrink isostatically by a factor of roughly 20%. The block height, diameter and hole diameters all shrink by roughly 20%. The tube diameter, wall thickness and length also shrink.

Lapping or grinding
If required, the sintered Black Carborundum parts can then be machined to precise tolerances using a very costly range of precision diamond grinding or lapping techniques.

Quality checks
The finished Black Carborundum parts go through a series of dimensional checks, tests and inspections (leak detection, crack detection, pressure testing, etc…). Mechanical properties are carefully checked and monitored after each production batch.

Black Carborundum Storage Precautions

Orderly storage, the same batch number as far as possible in rows, to avoid mistakes in the process of taking materials.

Black Carborundum micro powder has a strong moisture absorption, try to avoid removing the moisture-proof film storage; this can avoid moisture agglomeration, shorten the drying time.

As far as possible to use the principle of first-in first-out material, to avoid clumping of raw materials due to excessive storage time.
if the ultra-fine Black Carborundum powder in transit broken packaging, try to store separately to avoid dust pollution.

It is recommended that the warehouse as far as possible closed, stored separately, and pay attention to moisture, wind and rain.

Our factory

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2023092715383649e10974dd3d4489bd32b9daf379427e

2023092715383653a1c012a3ba4375b675902e3a5d17ef

20230927153836d86d51553f3e4d0081f3c93cd47a38e4

FAQ

Q: What is Black Carborundum used for?

A: Black Carborundum elements are used today in the melting of glass and non-ferrous metal, heat treatment of metals, float glass production, production of ceramics and electronics components, igniters in pilot lights for gas heaters, etc.The following acute (short-term) health effects may occur immediately or shortly after exposure to Black Carborundum: * Black Carborundum can irritate the eyes and nose on contact. * There is limited evidence that Black Carborundum causes cancer in animals. It may cause cancer of the lungs.

Q: Which are the applications of SiC in electronic devices?

A: Black Carborundum is a semiconductor that is perfectly suited to power applications, thanks above all to its ability to withstand high voltages, up to ten times higher than those usable with silicon. Semiconductors based on Black Carborundum offer higher thermal conductivity, higher electron mobility, and lower power losses. SiC diodes and transistors can also operate at higher frequencies and temperatures without compromising reliability. The main applications of SiC devices, such as Schottky diodes and FET/MOSFET transistors, include converters, inverters, power supplies, battery chargers and motor control systems.

Q: Why SiC overcomes Si in power applications?

A: Despite being the most widely used semiconductor in electronics, silicon is beginning to show some limitations, especially in high-power applications. A relevant factor in these applications is the bandgap, or energy gap, offered by the semiconductor. When the bandgap is high, the electronics it uses can be smaller, run faster, and more reliably. It can also operate at higher temperatures, voltages, and frequencies than other semiconductors. While silicon has a bandgap of around 1.12eV, Black Carborundum has a nearly three times greater value of around 3.26eV.

Q: Why can SiC handle so high voltages?

A: Power devices, especially MOSFETs, must be able to handle extremely high voltages. Thanks to a dielectric breakdown intensity of the electric field about ten times higher than that of silicon, SiC can reach a very high breakdown voltage, from 600V to a few thousand volts. SiC can use higher doping concentrations than silicon, and the drift layers can be made very thin. The thinner the drift layer, the lower its resistance. In theory, given a high voltage, the resistance of the drift layer per unit area can be reduced to 1/300 of that of silicon.

Q: Why SiC can outperform IGBT at high frequencies?

A: In high-power applications, IGBTs and bipolar transistors have mostly been used in the past, with the aim of reducing the turn-on resistance that occurs at high breakdown voltages. These devices, however, offer significant switching losses, resulting in heat generation issues that limit their use at high frequencies. Using SiC, it is possible to make devices, such as Schottky barrier diodes and MOSFETs, which achieve high voltages, low turn-on resistance and fast operation.

Q: Which impurities are used to dope Black Carborundum material?

A: In its pure form, Black Carborundum behaves like an electrical insulator. With the controlled addition of impurities or dopants, SiC can behave like a semiconductor. A P-type semiconductor can be obtained by doping it with aluminum, boron, or gallium, while impurities of nitrogen and phosphorus give rise to a N-type semiconductor. Black Carborundum has the ability to conduct electricity under some conditions but not in others, based on factors such as the voltage or intensity of infrared radiation, visible light, and ultraviolet rays. Unlike other materials, Black Carborundum is capable of controlling the P-type and N-type regions required for device fabrication over wide ranges. For these reasons, SiC is a material suitable for power devices and able to overcome the limitations offered by silicon.

Q: How can SiC semiconductors achieve better thermal management than silicon?

A: Another important parameter is the thermal conductivity, which is an index of how the semiconductor is able to dissipate the heat it generates. If a semiconductor is not able to dissipate heat effectively, a limitation is introduced on the maximum operating voltage and temperature that the device can withstand. This is another area where Black Carborundum outperforms silicon: the thermal conductivity of Black Carborundum is 1490 W/m-K, compared to the 150 W/m-K offered by silicon.

Q: How is SiC reverse recover time compared to Si-MOSFET?

A: SiC MOSFETs, like their silicon counterparts, have an internal body diode. One of the main limitations offered by the body diode is the undesired reverse recovery behavior, which occurs when the diode switches off while carrying a positive forward current. The reverse recovery time (trr) thus becomes an important index to define the characteristics of a MOSFET. Figure 2 shows a comparison between the trr of a 1000V Si-based MOSFET and a SiC-based MOSFET. As can be seen, the body diode of the SiC MOSFET is extremely fast: the values of trr and Irr are so small as to be negligible, and the energy loss Err is considerably reduced.

Q: Why is soft turnoff important for short circuit protection?

A: Another important parameter for a SiC MOSFET is the short circuit withstand time (SCWT). Since SiC MOSFETs occupy a very small area of the chip and have a high current density, their ability to withstand short circuits that can cause thermal breaks tends to be lower than that of silicon-based devices. In the case, for example, of a 1.2kV MOSFET with TO247 package, the short-circuit withstand time at Vdd=700V and Vgs=18V is about 8-10 μs. As Vgs decreases, the saturation current decreases and the withstand time increases. As Vdd decreases, less heat is generated and the withstand time is longer. Since the time required to turn off a SiC MOSFET is extremely short, when the turnoff rate Vgs is high, a high dI/dt can cause severe voltage spikes. A soft turnoff should therefore be used to gradually lower the gate voltage, avoiding overvoltage peaks.

Q: Why is isolated gate driver a better choice?

A: Many electronic devices are both low and high voltage circuits, interconnected to each other to perform control and power functions. A traction inverter, for example, typically includes a low voltage primary side (power, communication, and control circuits) and a secondary side (high voltage circuits, motor, power stage and auxiliary circuits). The controller located on the primary side normally uses feedback signals from the high voltage side and is susceptible to possible damage if no isolation barrier is present. An isolation barrier electrically isolates the circuits from the primary to the secondary side forming separate ground references, implementing the so-called galvanic isolation. This prevents unwanted AC or DC signals from being transferred from one side to the other, resulting in damage to the power components.

Q: What are the key uses of Black Carborundum?

A: Black Carborundum is a very popular abrasive in modern lapidary owing to its durability and the relatively low cost of the material. It is, therefore, crucial to the art industry. In the manufacturing industry, this compound is used for its hardness in several abrasive machining processes such as honing, grinding, water-jet cutting, and sandblasting.

Q: Comment on the hardness of Black Carborundum?

A: Black Carborundum has the ability to form an extremely hard ceramic substance making it useful for applications in automotive brakes and clutches, and also in bulletproof vests. In addition to retaining its strength at up to 1400°C, this ceramic exhibits the highest corrosion resistance among all the advanced ceramics.

Q: Is Black Carborundum soluble in water?

A: Black Carborundum is insoluble in water. However, it is soluble in molten alkalis (such as NaOH and KOH) and also molten iron. Black Carborundum can be considered as an organosilicon compound.

Q: Why is Black Carborundum so expensive?

A: The cost of a single Black Carborundum (SiC) chip can vary depending on several factors, including the specific application, size, complexity, and manufacturing process. Generally, SiC chips tend to be more expensive than traditional silicon chips due to the advanced materials and manufacturing techniques involved.

Q: What is Black Carborundum best for?

A: Since its grain fractures readily and maintain a sharp cutting action, silicon-carbide abrasives are generally used for grinding hard, low tensile strength materials such as chilled iron, marble and granite, and materials that need sharp cutting action such as fibers, rubber leather or copper.Fragile: Black Carborundum products are fragile and not suitable for some environments with large particles and easy wear. 4. Poor machinability: The machinability of Black Carborundum products is poor, and the processing is difficult, so it is difficult to manufacture Black Carborundum products with complex shapes

Q: Is Black Carborundum bulletproof?

A: Ceramic materials, such as Black Carborundum (SiC), are considered to be ideal for stopping rifle bullets due to their impressive strength and hardiness. SiC can be combined with backing materials and inserted into protective vests to provide vital body protection against any high-velocity projectiles.Black Carborundum does occur in nature as an extremely rare mineral known as moissanite, which was first found in 1893 in Arizona's Canyon Diablo meteor crater.

Q: Does Black Carborundum dissolve in water?

A: Black Carborundum is insoluble in water. However, it is soluble in molten alkalis (such as NaOH and KOH) and also molten iron.In July 2022, MIT News announced that cubic boron arsenide could be a possible alternative to silicon. Cubic boron arsenide performs better than silicon at conducting heat and electricity.

Q: Is Black Carborundum stronger than diamond?

A: Black Carborundum is hard with a Mohs hardness of 9.5, which is second only to the world's hardest diamond. In addition, Black Carborundum has excellent thermal conductivity. It is a kind of semiconductor and can resist oxidation at high temperature.Black Carborundum (SiC), also known as carborundum, is a compound of silicon and carbon with chemical formula SiC.

Q: Which is better Black Carborundum or tungsten carbide?

A: Black Carborundum in powder form significantly increases compressive and tensile strength [19]. Tungsten carbide (WC) is useful because it is a radiation protection material. WC in nano powder form provides higher protection from radiation and better compressive strength.Tesla announced a new powertrain for a future vehicle that features 75% less Black Carborundum components. Chipmakers involved with Black Carborundum dipped on the news, although key industry player Aehr Test Systems doesn't see Tesla's announcement as having a big impact on future demand.

Q: Can Black Carborundum cut glass?

A: Black Carborundum wheels are useful for cutting glass, quartz, ceramics, titanium, tungsten, zirconium, uranium, beryllium and germanium, fiber, plastics (such as phenolics) and fiber-reinforced plastics.The key dangers being skin contact with a probable carcinogen, or inhalation of crystalline silica that could damage your lungs. Some states in the US, NJ is one example, list Black Carborundum as a hazardous substance.

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