Ferro Alloy NEWS

What determines the performance of black sic

What determines the performance of black sic

Black Sic

Black silicon carbide black sic is made from petroleum coke and silica as the main raw materials through high-temperature smelting in a resistance furnace. Its hardness is between corundum and diamond, and its mechanical strength is higher than corundum;


The silicon content in black sic  determines its hardness

The silicon content in black silicon carbide powder determines its hardness. The particle size of silicon carbide has a great influence on wire cutting, but the most important thing is the particle shape of silicon carbide.

Black silicon carbide powder is black, with crystal structure, high hardness, strong cutting ability, stable chemical properties and good thermal conductivity. The microscopic shape is a hexagonal crystal. The Mohs hardness of silicon carbide is 9.2, the Vickers microhardness is 3000–3300 kg/mm, the Knoop hardness is 2670-2815 kg/mm, and the microhardness is 3300 kg/cubic millimeter.


Specifications Silicon carbide




SiC F.C Fe2O3
black SiC98 98.0%Min 0.3%Max 0.8%Max
black SiC95 95.0%Min 0.6%Max 1.25%Max
black SiC90 90.0%Min 1.0%Max 1.3%Max
black SiC88 88.0%Min 2.0%Max 1.2%Max
black SiC85 85.0%Min 2.5%Max 3.5%Max
black SiC80 80.0%Min 5.0%Max 3.5%Max
black SiC75 75.0%Min 12%Max 3.5%Max
black SiC65 65.0%Min 15%Max 3.5%Max


Silicon carbide applications

Green silicon carbide powder can be used for bonded and coated abrasive tools, free grinding and polishing, etc. Suitable for processing cast iron, carbide, titanium alloy, high-speed steel, etc. It can also grind glass, ceramics, stone, agate, jewelry, jade and other non-metallic materials, heating elements and thermal energy elements. 

black sic is made from quartz sand and petroleum coke as the main raw materials, and is smelted at high temperature in a resistance furnace. It is black crystal with microhardness HV3100-3280, brittle and sharp, and has certain electrical and thermal conductivity.


  • Refractory and corrosion-resistant materials

Because silicon carbide has a high melting point (degree of decomposition), chemical inertness and resistance to thermal shock, silicon carbide can be used in abrasive tools, shed plates and saggers used in ceramic product firing kilns, and vertical cylinder distillation furnaces in zinc smelting industries. Used silicon carbide bricks, aluminum electrolytic cell linings, crucibles, small furnace materials and other silicon carbide ceramic products.

  • Chemical use

Silicon carbide can be used as a purification agent for smelting steel, that is, as a deoxidizer and a structural improver for cast iron. This generally uses low purity silicon carbide to reduce costs. It can also be used as a raw material for manufacturing silicon tetrachloride.

  • Electrician use

Used as heating elements, non-linear resistance elements and highly semiconducting materials. Heating elements such as silicon carbon rods (suitable for various electric furnaces working at 1100 to 1500°C, nonlinear resistor elements, and various lightning protection valves.

black Sic

Silicon carbide manufacturers recommend:

The dosage of pig iron in the charge is recommended to be around 10%, and the appropriate proportion of smelting silicon carbide as the charge is added is between 40% and 55%. During the tapping process, appropriate silicon carbide particles should be selected, and the amount added should be 0.1%-0.2% times more than during cupola melting. If you have any questions or needs about silicon carbide, you can consult us.

Spread the love

Have Questions?

Please leave your contact information, and we will reply you as soon.

Dear friend, if you are interested in our products, Please leave your contact information, and we will reply you as soon..

  • Floor 2, Zhongyi Business, Wenming Blvd, Wenfeng District, Anyang city,Henan province, China
  • +86-18567896826
  • info@wyalloys.com
Send Inquiry Send Email Whatsapp Facebook