Silicon carbide is a colorless transparent crystal, its hardness between corundum and diamond, can be used as some industrial materials, developed a long time ago, is the earliest artificial abrasive, but because of its comparison with traditional silicon materials in terms of manufacturing process and cost disadvantages, resulting in only in a small range of applications, the following small series for you to introduce the use of silicon carbide properties and prospects.
First, the properties of silicon carbide
1, abrasive
Mainly because silicon carbide has high hardness, chemical stability and a certain toughness, so silicon carbide can be used to manufacture cemented abrasives, coated abrasives and free grinding, so as to process glass, ceramics, stone, cast iron and some non-ferrous metals, cemented carbide, titanium alloy, high-speed steel tools and grinding wheels.
2, refractory materials and corrosion resistant materials
Mainly because silicon carbide has a high melting point (degree of decomposition), chemical inertia and thermal vibration resistance, so silicon carbide can be used for grinding tools, ceramic products fired in the kiln with the shed plate and saggar, zinc smelting industrial vertical cylinder distillation furnace with silicon carbide bricks, aluminum electrolytic tank lining, crucible, small pieces of furnace materials and other silicon carbide ceramic products.
3. Chemical Industry
Because silicon carbide can be decomposed in molten steel and react with oxygen and metal oxides in molten steel to produce carbon monoxide and silicon-containing slag.
Therefore, it can be used as a purifying agent for smelting steel, that is, as a deoxidizer for steelmaking and a cast iron tissue improver.
This generally uses low-purity silicon carbide to reduce costs.
It can also be used as a raw material for the manufacture of silicon tetrachloride.
4. Electrician
Used as heating element, nonlinear resistance element and high semiconductor material.
Heating elements such as silicon carbon rod (suitable for all kinds of electric furnaces working at 1100 ~ 1500℃), nonlinear resistance elements, all kinds of lightning arrester valve plates.
Second,The application prospect of silicon carbide
1, the global silicon carbide industry pattern shows the United States, Europe, Japan tripartite situation.
Among them, the United States is the largest in the world, and 70% to 80% of the global SiC production comes from American companies, typical companies are Cree, Dow Corning, SiCrystal, Showa Denko and so on.
2, Europe has a complete silicon carbide substrate, epitaxy, devices and application industry chain, typical companies are Infineon, ST, etc.;
Japan is a leader in the development of equipment and modules, typical companies are Rohm Semiconductor, Mitsubishi Electric, Fuji Electric, and so on
3, Huawei recently through its Hubble Technology Investment Co., Ltd. invested in Shandong Tianyue Company, the latter is a silicon carbide based semiconductor materials company, the move shows that Huawei is laying out a new generation of semiconductor technology.
4, SAN An Optoelectronics disclosed a fixed increase plan, intends to raise no more than 7 billion yuan, of which lead high core intends to subscribe 5 billion yuan, Gree Electric Appliances intends to subscribe 2 billion yuan.
Gree Electric said the investment in SAN 'an Optoelectronics would help the business break into semiconductor manufacturing.