Carbides; of silicon, whether or not chemically defined

HS code 284920 covers the classification of silicon carbide, a versatile and widely-used industrial material. Silicon carbide is a hard, refractory ceramic compound that exhibits exceptional thermal and electrical properties, making it a crucial component in a variety of manufacturing processes and applications. As a key input for numerous industries, including abrasives, refractories, and advanced ceramics, the production and trade of silicon carbide plays a significant role in the global economy.

The primary production method for silicon carbide involves the carbothermic reduction of silica (SiO2) in the presence of carbon. This process typically takes place in an electric arc furnace, where the raw materials are heated to extremely high temperatures, facilitating the chemical reaction that forms the silicon carbide crystals. The resulting product is then crushed, graded, and processed to meet the specific requirements of various end-use applications.

The main inputs required for the production of silicon carbide include high-purity silica sand or quartz, petroleum coke or coal, and a source of energy, typically electricity. Specialized equipment, such as electric arc furnaces and crushing/grinding machinery, are also essential for the manufacturing process. Additionally, the production of silicon carbide may require the use of various additives and processing aids to control the quality and characteristics of the final product.

The primary output of HS code 284920 is silicon carbide, which finds applications in a wide range of industries. 282010 Aluminium oxide and 681599 Other articles of stone or of other mineral substances, n.e.s. are two examples of codes that may consume silicon carbide as a key input for the production of abrasives, refractories, and advanced ceramic materials. Silicon carbide is also used in the manufacture of 854020 Cathode-ray television picture tubes; including video monitor cathode-ray tubes, 854140 Photosensitive semiconductor devices, including photovoltaic cells whether or not assembled in modules or made up into panels; light-emitting diodes, and 851420 Industrial or laboratory electric furnaces and ovens; induction or dielectric heating equipment, among other products.