1) when the silicon carbon rod is heated in the air, a dense silicon oxide film is formed on its surface, which becomes an anti-oxidation protective film and plays a role in prolonging its life. In recent years, various coatings have been developed to prevent cracking of silicon carbon rods, which are used in furnaces with various gases.

(2) the higher the current flow, the higher the surface temperature. Minimum surface load density (power) is recommended. Please note that the values recorded at the cold end of the silicon carbon rod are current and voltage at 1000℃ in the air, which may not be consistent with the actual use. Generally, the surface power of silicon carbon rod is obtained from the relationship between the temperature in the furnace and the surface temperature of silicon carbon rod. It is suggested to use the current and voltage of the limit density of silicon carbon rod, which may not be consistent with the actual use. In general, the surface power of silicon carbon rod is obtained from the relationship between the temperature in the furnace and the surface temperature of silicon carbon rod. It is recommended to use the surface power (W/ cm2) of the value of 1/2 to 1/3 of the limit density of silicon carbon rod.

(3) when the silicon carbon rod is used continuously, it is expected to slowly increase the resistance to maintain a long life.

(4) parallel silicon carbon rods as far as possible. If the resistance value of the silicon carbon rod is different, the load of the silicon carbon rod with high resistance is concentrated in series, which leads to the rapid increase of the resistance of a certain silicon carbon rod and the shorter life

(5) the temperature distribution characteristics of silicon carbide, new shipment inspection specifications for within the effective length of fever for Δ just calculate qualified within 60 ℃, the temperature distribution of course will be bigger, with its aging could eventually reach 200 ℃. The specific temperature distribution changes also because of the furnace atmosphere, the use of different conditions and different. The specific temperature distribution varies with the furnace atmosphere and service conditions.

(6) the service life of the silicon carbon rod is shorter with the higher service temperature. Therefore, after the furnace temperature exceeds 1400℃, the oxidation speed is accelerated and the service life is shortened. Please pay attention not to let the surface temperature of the silicon carbon rod be too high in use. After that, the oxidation speed is accelerated and the service life is shortened. Please pay attention not to make the surface temperature of the silicon carbon rod too high.