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Silicon Carbide heating elements are made from high purity alpha silicon carbide grains, that are extruded in the form of rods or tubes, before being bonded together by a process of recrystallization, at temperatures of over 2500°C (4530°F). The firing process ensures the creation of rods with strong uniform bonds between adjacent grains, and the particle size distribution is closely controlled to ensure optimum density and resistance to the process atmosphere.
Silcarb SiC elements have the conventional central hot zone and two low resistivity cold ends. Three pieces Alpha Silicon Carbide Rod features welded low resistance cold ends which run cooler than anyone-piece cold ends and are joined to the hot zone using the strong reaction-bonding technique. As the resistivity of the hot zone material is considerably higher than that of the cold ends, most of the heat is generated in the hot zone, when power is applied. The cold ends, which pass through the furnace lining, remain relatively cool and are sprayed over a short length at the end with aluminum, to form a low resistance contact for the aluminum terminal braids. Heat is concentrated in the Furnace, not the ends, for energy efficiency. Maximum Temperature 1550° C. Silcarb manufactures a wide range of different silicon carbide heating elements based on customer requirements. The heating elements manufactured have a high-applied temperature, anti-oxidization, easy installation, and maintenance.
Elements with unequal cold end lengths can also be manufactured if required. The SiC heating elements can be widely used in various high-temperature electric furnaces and other electric heating devices, such as in the industries of magnet, ceramic, powder metallurgy, glass metallurgy and machinery, etc.
The firing process ensures the creation of rods with strong uniform bonds between adjacent grains, and the particle size distribution is closely controlled to ensure optimum density and resistance to the process atmosphere. As the resistivity of the hot zone material is considerably higher than that of the cold ends, most of the heat is generated in the hot zone when power is applied. The cold ends remain relatively cool, ensuring energy efficiency, long service life, and reliable operation in high-temperature furnace environments.
The SiC heating elements can be widely used in various high-temperature electric furnaces and other electric heating devices, such as in the industries of magnet, ceramic, powder metallurgy, glass metallurgy and machinery, etc.
Three Piece Straight Alpha Silicon Carbide Rods are especially suited for continuous and batch-type industrial furnaces where uniform heat distribution, high operating temperatures, and long service life are required. These heating elements are commonly used in ceramic kilns, glass furnaces, sintering furnaces, heat treatment furnaces, and metallurgical processing furnaces, where energy efficiency and stable electrical performance are critical.
