Silicon Carbide
Anyang jin rong metallurgy co., LTD., formerly jin rong metallurgy factory, we are a professional metallurgical company from China, with an annual production capacity of 100000 tons of workshop. We focus on rare metal mining and processing, with the support of experience and technology, we have enough ability to do foreign trade, under the much-anticipated, jin rong metallurgy company set up foreign trade. The company has a long-term engaged in import and export business of professional foreign trade team of experts, knowledge comprehensive, diligence, energetic. Our customers come from all over the world, such as the east Asia and southeast Asia, North America, Europe and Australia. Since its establishment, we always adhere to the principle of customer first, strictly regard the quality and service as the key point, anyang jin rong metallurgy co., LTD. always at your service.
Why Choose Us？
R&D Capability
Anyang jin rong metallurgy co., LTD. has two production bases, two key laboratories and a metallurgical materials testing center, has dozens of senior researchers. With colleges and universities, metallurgical production enterprise committed to the new material, new technology, new technology, new product development and application of fully achieved on the basis of the sustainable development of the existing processes and products, and continuously to develop new technology and new products.
Perfect Logistics and After-Sales Service
Our team through strict screening and training, each employee has a high level of communication skills and ability, grasps the most professional knowledge and the most patient of service attitude, guarantee for you to solve all problems and confusion. We guarantee to reply your email in less than 24 hours. Additionally, we have long-term logistic partner to enhance the stability of transportation and well manage potential shipment risk.
Professional Team
The company has a long-term engaged in import and export business of professional foreign trade team of experts, more than 10 of which are senior researchers. Besides, We have more than 16 years of experience in producing high-quality Molybdenum Alloy products.
Good Supply Channel and High Quality
Our unique advantage we have good supply channel make the product prices are lower than those offered by other peers, the quality is better. We continue to develop new FeMo70, constantly improve quality, enhance the durability of products, and offer high quality and low price products to customers.
What is Silicon Carbide ?
Silicon carbide, also known as SiC, is a semiconductor base material that consists of pure silicon and pure carbon. You can dope SiC with nitrogen or phosphorus to form an n-type semiconductor or dope it with beryllium, boron, aluminum, or gallium to form a p-type semiconductor. Darker, more common versions of silicon carbide often include iron and carbon impurities, but pure SiC crystals are colorless and form when silicon carbide sublimes at 2700 degrees Celsius.
How is Silicon Carbide Made?
Lely Method
The simplest silicon carbide manufacturing method involves melting silica sand and carbon, such as coal, at high temperatures―up to 2500 degrees Celsius. During this process, a granite crucible heats to a very high temperature, usually by way of induction, to sublimate silicon carbide powder. A graphite rod with lower temperature suspends in the gaseous mixture, which inherently allows the pure silicon carbide to deposit and form crystals.
Chemical Vapor Deposition
Alternatively, manufacturers grow cubic SiC using chemical vapor deposition, which is commonly used in carbon-based synthesis processes and used in the semiconductor industry. In this method, a specialized chemical blend of gases enters a vacuum environment and combines before depositing onto a substrate.
Advantages of Silicon Carbide
SiC has a higher breakdown voltage compared to silicon, which allows for the design of higher voltage power devices. SiC operates at above 10kV, significantly above what can currently be used. SiC devices rated at 1,200V and 1,700V are available.
SiC has a higher thermal conductivity compared to silicon, which leads to improved thermal management and reduced power losses. The performance of silicon worsens over higher temperatures, whereas SiC is much more stable.
SiC can operate at higher temperatures compared to silicon, which results in improved reliability and longer device lifetimes. A silicon device is usually over-specified at room temperature to maintain specification at higher temperatures. Typically, an SiC device with half the current rating will perform the same job as a silicon IGBT because SiC is much more stable over higher temperatures and doesn’t need significant derating.
Higher frequencies mean reduced size and weight of the magnetics because the values of components in the transformer LC filter become significantly lower. SiC can switch on and off much faster compared to silicon, which results in improved power density and efficiency in power electronics applications.
SiC has a lower forward voltage drop compared to silicon, the virtual absence of a tail current allows a faster turn‑off and dramatically lower losses. Since there is less energy to dissipate, an SiC device can switch at higher frequencies and improve efficiency.
Silicon Carbide Powder
Silicon carbide powder is a commonly used abrasive material. Silicon carbide powder can be produced by reacting and pyrolyzing vaporized polysiloxanes in a single heating step, which produces silicon carbide powder. This process is straightforward and inexpensive. This method basically involves introducing a vaporized polysiloxane into a reaction chamber. The polysiloxane vapor is then made to react at a temperature of about 2900°F for a period of time sufficient to convert the polysiloxane vapor into silicon carbide powder, which is then collected. Silicon carbide powders serve as grinding powders for fine grinding or rough polishing semiconductors, ceramics, and ferrous materials. It can also be used for shaping, honing, and polishing other materials.
Silicon Carbide Sandpaper
Another common application of silicon carbide is in wet and dry sanding. This includes automotive polishing, as well as polishing stone and marble. In more coarse grits, the abrasive is ideal for removing rust, deburring metal and glass, refinishing wood flooring, etc.
Silicon Carbide Grinding Wheel
Grinding wheels consist of abrasive compounds, which are used for various grinding and abrasive machining operations in grinding machines. Most grinding wheels are made with composite materials. Silicon carbide grinding wheel is another common application of the fast-cutting silicon carbide material. It is used for non-ferrous metals. It has very sharp abrasive grains and is typically recommended for grinding relatively soft metals like aluminum or cast iron. It can also be utilized for grinding extremely hard materials like cemented carbide. For instance, a green silicon carbide grinding wheel is a type of bonded abrasive that uses green silicon carbide grain materials and vitrified or resinoid bonds to form certain shapes. Green silicon carbide grinding wheels are mostly used on carbides. Black silicon carbide, on the other hand, is used for machining materials like stone, plastics, etc. These wheels can be run with or without coolant.
Silicon Carbide Sharpening Stone
A common application of silicon carbide sharpening stone is for the sharpening of knives made from hard stainless steel. Silicon carbide sharpening stone cuts aggressively. Usually, silicon carbide stones do come in a coarser grit and are suitable for the initial coarse sharpening. Silicon carbide stones have been shown to have a Mohs Hardness of 9-10. Silicon carbide sharpening stones can be used with either water or oil. Oil stones, for instance, can be made from different types of materials, which are novaculite, aluminum oxide, and silicon carbide, but the fastest cutting oil stones are silicon carbide stones. When using water with the stones, it helps to have some dish soap mixed with it, so it doesn’t just soak into the pores immediately.
What are the Uses of Silicon Carbide?
Silicon Carbide Used in Military Bulletproof Armor
Silicon carbide 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 silicon carbide forms. Bullets can't penetrate the ceramic blocks.
Silicon Carbide Used in Semiconductors
Silicon carbide becomes a semiconductor when dopants are added to it. Dopants like boron and aluminum added to silicon carbide make it become a p-type semiconductor. On the other hand, dopants such as nitrogen and phosphorus added to silicon carbide 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.
Silicon Carbide Used in Abrasives
Silicon carbide 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. Silicon carbide 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.
Silicon Carbide Used in Electric Vehicles
Silicon carbide is a better choice over silicon for powering electric vehicles. Electric vehicles powered by silicon carbide are highly efficient and cost-effective. At present, many well-known companies have used silicon carbide to improve efficiency and range when manufacturing electric vehicles, such as Tesla.
Silicon Carbide Used in Jewelry
Structurally similar to diamond, yet more lustrous, cheaper, more durable, and lighter than diamond, silicon carbide is a well-deserved alternative to diamond in the jewelry industry.
Silicon Carbide Used in Fuel
In addition to its other uses, silicon carbide is used as fuel. It is used as a fuel in steel manufacture and produces purer steel than most other fuels. It is also a cheaper and more environmentally-friendly fuel.
Silicon Carbide Used in LEDs
The first set of light-emitting diodes (LEDs) to be produced made use of silicon carbide technology. It was used to manufacture blue, red, and yellow LEDs. LEDs are used in televisions, display boards, and computers.
The combination of silicon with carbon provides this material with excellent mechanical, chemical and thermal properties, including:
- High thermal conductivity
- Low thermal expansion and excellent thermal shock resistance
- Low power and switching losses
- High energy efficiency
- High operating frequency and temperature (operating up to 200°C junction)
- Small die size (with the same breakdown voltage)
- Intrinsic body diode
- Excellent thermal management which reduces cooling requirements
- Long lifetime
Silicon Carbide Storage Precautions
Orderly storage, the same batch number as far as possible in rows, to avoid mistakes in the process of taking materials.
Silicon carbide 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 silicon carbide 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.
Silicon vs. Silicon Carbide
What are Silicon and Silicon Carbide Made Of?
●When synthesized in its purest form, silicon forms a crystalline structure where a single silicon atom forms a bond with four other adjacent silicon atoms. This silicon base substrate can then be doped with various other elements to form semiconductor junctions on a wafer of the silicon substrate.
●Silicon carbide, on the other hand, is a blend of silicon and carbon atoms that forms a variety of crystalline structures. The most widely adopted structures for semiconductor use are 3C, 4C, and 6H silicon carbide, all of which have different electrical properties and advantages when doped with various elements. Silicon wafers grow up to 8-12 inches and form from a molten phase of pure silicon. Silicon carbide, however, generally synthesizes from the vapor phase and can grow up to six inches.
Silicon & Silicon Carbide Properties: Power and Speed
Given its ability to withstand higher electric fields, silicon carbide substrate materials can withstand higher voltages before breaking down. Silicon has a breakdown voltage of around 600V, while silicon carbide can withstand voltages 5-10 times higher. What this means in practice is that high-power applications will be able to utilize semiconductor technology, or that a device of the same voltage difference can get nearly ten times smaller. Silicon carbide can switch at nearly ten times the rate of silicon, which results in smaller control circuitry.
Silicon & Silicon Carbide Applications in the Real World
One great industry example of implementing silicon carbide over silicon is in the electric vehicle industry. When driving an EV, the electronics system is designed to support the full load of the vehicle's power capability, which is achievable in both silicon and silicon carbide-based designs. Silicon IGBTs are commonly utilized in EV inverters, where they drive battery-powered motors. However, given a car's normal drive cycle of a car (i.e., not utilizing a full load), silicon's high resistivity makes it rather inefficient. Since silicon carbide can handle the same load design requirements at a much smaller size, silicon carbide becomes significantly more efficient and can subsequently increase the entire inverter system's efficiency by nearly 80%.
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