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SiC mainly has functional ceramics, advanced refractories, abrasives and metallurgical raw materials four functional areas

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Update time : 2021-03-22 14:17:27
What is silicon carbide? Is silicon carbide natural?
Silicon carbide, which occurs as an extremely rare mineral mohsenate.Is a kind of inorganic, chemical formula for SiC, is the use of quartz sand, petroleum coke (or coal coke), wood chips (production of green silicon carbide need to add salt) and other raw materials through the resistance furnace high-temperature smelting. Silicon carbide is also found in nature in a rare mineral, moissanite. In C, N, B and other non-oxide high-tech refractory raw materials, silicon carbide is the most widely used, the most economical one, can be called gold steel sand or refractory sand. China's industrial production of silicon carbide is divided into black silicon carbide and green silicon carbide two kinds, are hexagonal crystal, the specific gravity of 3.20 ~ 3.25, the microhardness of 2840 ~ 3320kg/mm2.
What is the use of silicon carbide?
Silicon carbide is used as an abrasive, as well as as a gemstone quality semiconductor and diamond imitator. The simplest way to make silicon carbide is to combine the silica sand and carbon at high temperatures between 1,600 ° C (2,910°F) and 2,500 ° C (4,530°F).
Is silicon carbide expensive?
Silicon carbide is a non-oxide ceramic used in a variety of products and must be used in thermal (high temperature and thermal shock) and mechanically demanding applications. In contrast, single-crystal SiC has the best properties but is very expensive to manufacture.
Is silicon carbide dangerous?
Silicon carbide can stimulate eye and nose contact.* Repeated high-temperature exposure to silicon carbide may cause pulmonary pneumonia (a chronic disease of the lung), chest X-ray changes, reduced lung function, shortness of breath, wheezing, and coughing.
How hard is silicon carbide?
It has a hardness rating of 9, close to a diamond rating. In addition to hardness, silicon carbide crystals have crack properties, making them very useful in grinding wheels and abrasive paper and cloth products.
How do you make homemade silicon carbide?
Typically, silicon carbide is produced using the Acheson process, which involves heating the silica sand and carbon to high temperatures in an Acheson graphite resistance furnace. It may form into a fine powder or adhesive mass that must be crushed and ground before being used as a powder feedstock.
How to make silicon carbide crucible?
The silicon carbide crucible is made of silicon carbide and graphite and is made of tar or other synthetic resins as the bonding material. These crucibles are mainly used to melt non-ferrous metals such as brass, copper, nickel, chromium and their alloys.
For basic crucible, you will need 30% to 50% (by weight) flake graphite and 10% to 50% silicon carbide. Make sure you include high-heat clay in your recipe so that your crucible can withstand the heat of the stove.
Tesla's Innovative Power Electronics: The Silicon Carbide Inverter
Just like Presley in the 1960s, Tesla can say that you can achieve the best, most popular feat. Tesla entered a new market and quickly became the best-selling electric car manufacturer: from the US home market in Europe, in the United States, in South Korea and China conquered, CEO Elon Musk became the richest in the universe. People.
What is the difference between Tesla? The "large three" activation technique of universal reference to electric vehicles is a battery, electric traction motor and power electronics.
Silicon carbide inverter
For electric vehicles, power electronics are critical to a variety of functions, but perhaps the most critical is the primary inverter, which converts the DC battery into three-phase AC to perform a smooth operation of the electric traction motor. At the heart of the power electronic device, it is the power switch technology (transistor), has seen more than five generations. Today, the silicon rending gate bipolar transistor (Si IGBT) is dominated, including an electric vehicle inverter. We are now being transformed into the sixth generation, with broadband semiconductor materials, tapping: silicon carbide (SiC) for high pressure/power applications and gallium nitride (GaN) for reducing voltage and power. This shift allows smaller and higher density power modules to operate at higher temperatures and creates new material opportunities throughout the power module package.
Why is Tesla's inverter innovation?
Well, with the release of article 3 of 2018, Tesla became the first company that added a SiC metal-oxide-semiconductor field-effect transistor (MOSFET) from ST microelectronics in the internal inverter design. The overall design has exceeded the use of the SiC package beyond a variety of innovations, but this is the main innovation. It leads to the total weight of the inverter (4.8kg) in 2019, half of the leaf (11.15kg), less than Jaguar I-PACE (8.23kg), using Si IGBT inverter and shelf section.
The use of SiC MOSFETs further created new material opportunities because the limits of conventional materials are stretched. In order to handle a larger small power density, the Cu lead frame (the metal structure of the remaining signal from the diff) is carried to the remainder of the inverter in the more conventional AL line bonding. The mold attachment material is also stepping from conventional solder toward Ag sintered mold attachment materials to handle higher temperatures.
What is a seizing the opportunity?
As with any emerging technology, the cost has always been the main obstacle to absorb other capabilities in SiC MOSFETs and power module packages. But Tesla seems to also solve this: its inverter has experienced a significant cost decline in only three years. According to the experience curve calculated by IDtechex, according to the 2018 model 3 inverter cost estimate and the second type of the same inverter of the 2020 model Y. It can be seen that Tesla's SiC inverter appears to be the same as the SI IGBT module used in the 2019 version of Nissan and Jaguar I-PACE. The result is that Tesla's overall inverter and permanent magnet motor combination are the best in the market (if not), efficiency is 97%, more and more efficient, without increasing expensive battery capacity. All costs are displaced with old technology.
TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years experience in providing super high-quality chemicals and Nanomaterials. Currently, our company has successfully developed a series of materials. The Silicon carbide Powder produced by our company has high purity, fine particle size and impurity content. Send us an email or click on the needed products to send an inquiry.
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