Difference between the Green & Black Silicon Carbide

According to the use of silicon carbide we wrote earlier, we have a general understanding of the use of silicon carbide, but silicon carbide can be divided into green silicon carbide and black silicon carbide, I want to see the The difference may have a certain understanding of black silicon carbide, but we often do not know whether to buy black silicon carbide or green silicon carbide when buying.

 

We all know that silicon carbide is widely used in modern daily life and industrial manufacturing, as well as high-tech products such as chips, military, aviation and other fields. Although black silicon carbide and green silicon carbide are both a type of silicon carbide. But their respective uses and cost performance are different.

Black silicon carbide is mainly made of quartz sand, petroleum coke and high-quality silica, which is smelted at high temperature through a resistance furnace. Its hardness is between brown corundum and diamond, its mechanical strength is higher than that of brown corundum, it is brittle and sharp, and it is relatively cheap compared to the price of green silicon carbide.

The production process of green silicon carbide is the same as that of black silicon carbide, but the purity of the plateau material used is relatively high. It is also formed at a high temperature of about 2200 ° C in a resistance furnace and is translucent. Its content is higher than that of black silicon carbide. The performance is similar to black silicon carbide, but the performance is slightly more brittle than black silicon carbide, and it also has better thermal conductivity and semiconductor characteristics. Its hardness is between brown corundum and diamond, its mechanical strength is higher than that of brown corundum, and its price is relatively expensive compared to black silicon carbide

 

 

Application and characteristics of silicon carbide:

① Black silicon carbide contains about 95% SiC, and its toughness is higher than that of green silicon carbide. Most of them are used to process materials with low tensile strength, such as glass, ceramics, stone, refractory materials, cast iron and non-ferrous metals.

②Green silicon carbide contains more than 97% of SiC and has good self-sharpness. It is mostly used for processing cemented carbide, titanium alloy and optical glass. It is also used for grinding cylinder liners and precision grinding high-speed steel tools.