difference between green silicon carbide and black silicon carbide

There are two colors of silicon carbide on the market, one is black and the other is green. The content and use of different colors will vary. But why does the industrial product appear black or green?

Some people think that the reason why black silicon carbide appears black is because there are tiny carbon particles in the crystal. Everything has characteristics, including this product, which also has physical characteristics. There are also some practical problems in the manufacturing process that need to be addressed by relevant researchers. There are many types of this product, and companies choose the right one according to their needs. Although this product has excellent performance, its wide application still faces some challenges. Colleagues or friends in this industry may be clear, but most people still don't know much about this industry.

Black silicon carbide

Black silicon carbide is made of quartz sand petroleum coke and high-quality silicon dioxide through high temperature smelting.

The raw material of green silicon carbide is roughly the same as that of black silicon carbide. In addition, industrial salts are used as reactants and promoters to conduct reactions in resistance furnaces. In terms of color, it's green, so it's named green silicon carbide.

The connection between black silicon carbide and green silicon carbide

Quartz sand, petroleum coke, recycled materials, sawdust, etc. are used in the production process.

Difference between green silicon carbide and  black silicon carbide

In addition to chromatic aberration, in general, green silicon has good sharpness, and black silicon has good toughness. The two colors of silicon carbide have different uses.

Green silicon carbide has a purer texture and higher hardness than black silicon carbide. In addition to the same grinding purpose as black silicon carbide, it is more suitable for fine grinding of threads, grinding tools and other materials, and is more widely used in the grinding of hard alloy materials and diamond products.

Green silicon carbide

Other notes:

Without salt, the carbonaceous material cannot react with it due to the rapid evaporation of silicon dioxide, which leads to the loss of some silica vapor escape, and the carbonaceous material has not completely occurred, leaving fine particles in the crystals of the product. In the process of producing green products, we often say that one more element than black products is salt, because salt can promote the green appearance of this product. However, after a long period of extensive testing, some manufacturers have found that in the process of smelting green products, when the impurities (aluminum, calcium, magnesium, boron, etc.) in the raw materials are large, pure green products cannot be smelted. Conversely, if the purity of the raw materials is too high, fresh green products can be smelted without adding salt. In the process of smelting green products and adding salt, sometimes there are some side effects, increasing leakage of furnace charge and furnace body, and increasing corrosion of equipment and workshop. Therefore, pay attention to the use of salt during the smelting process of this product.