Characteristics Of Silicon Carbon Rods

Compared with other electric heating elements, silicon carbon rods are materials with relatively high electrical conductivity. They are made by pressing or extruding and then sintering at high temperatures. Typical silicon carbon rods are between 12 and 40mm in diameter and 300 to 4000mm in length. conventional models include equal diameter silicon carbon, U-shaped silicon carbon, thick-end silicon carbon rods, threaded silicon carbon rods and so on.

The resistance of a silicon carbon rod varies with temperature and time. The nature of these variations depends on the material and the specific grade of the manufacturer. For most types, the resistance tone when the material is cold, decreases as the temperature rises, usually reaching small values between 800°C and 900°C, and then increases again as the temperature rises further. When kept at high temperatures, the resistance of the material increases with time. The rate of ageing is influenced by the surrounding atmosphere and also depends to a large extent on the operating temperature (and therefore on the power dissipated). When the resistance of the silicon carbon rods becomes too high, or the power becomes reduced to a certain level, the rods are replaced.