Silicon carbide ball is one of the most popular silicon carbide products. Silicon carbide can be produced by carbothermal reduction of silica. In this way, the end product is silicon carbide powder. After being pulverized and ground, these powders can be used to produce silicon carbide materials of various shapes, such as silicon carbide balls, silicon carbide plates and etc. Since SiC balls are made by physical methods of silicon carbide powder, their properties are almost the same.
Hundreds of silicon carbide (polytype) structures have been identified, the simplest of which is a diamond structure, calledβ-SiC, the other is hexagonal or diamond shaped, and is referred to asα-SiC.
Silicon Carbide Properties
Silicon carbide has excellent thermal conductivity and low thermal expansion, and has good thermal shock resistance. Its advantages make it a popular refractory material.
In addition, silicon carbide has high hardness, corrosion resistance and wear resistance, so the silicon carbide grinding ball is also widely used.
Silicon carbide also has interesting electrical properties due to its semiconductor properties, with resistance changes of up to seven orders of magnitude for different components.
Multiple Applications
Abrasive and cutting tools: Silicon carbide ball is a popular abrasive in modern gemstones. In manufacturing, it is used for the hardness of the grinding process, such as grinding, honing, water jet cutting and sand blasting. The silicon carbide particles are laminated to the paper to create a sandpaper and grip belt on the skateboard.
Electric systems: The earliest electrical application of SiC was in lightning arresters in electric power systems. These devices must exhibit high resistance until the voltage across them reaches a certain threshold VT at which point their resistance must drop to a lower level and maintain this level until the applied voltage drops below VT.
Electronic circuit elements: Silicon carbide was the first commercially important semiconductor material. A crystal radio “carborundum” (synthetic silicon carbide) detector diode was patented by Henry Harrison Chase Dunwoody in 1906. It found much early use in shipboard receivers.
Nuclear fuel particles and cladding: Silicon carbide is an important material in TRISO-coated fuel particles, the type of nuclear fuel found in high temperature gas cooled reactors such as the Pebble Bed Reactor. A layer of silicon carbide gives coated fuel particles structural support and is the main diffusion barrier to the release of fission products.
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Advanced Ceramic Materials 