Mountain-shaped silicon carbide rod performance:
Physical properties: component texture: hard and brittle, resistant to rapid cold and heat, not easy to deform under high temperature, other physical properties are as follows:
Density: 3.2 g/cm3; Mohs hardness: 9.5; Specific heat: 0.17 kcal/kg °C;
Thermal conductivity: 20 kcal/m? hour? Degree; linear expansion coefficient: 5×10-6 (m/℃)
The use of Yamagata silicon carbide rods:
(1) After the silicon carbide rod is heated in the air, a dense silicon oxide film is formed on the surface, which becomes an anti-oxidation protective film, which plays a role in extending the life. In recent years, various coatings have been developed to prevent cracking of silicon carbide rods for use in furnaces with various gases.
(2) The greater the amount of current applied to the silicon carbide rod, the higher the surface temperature of the silicon carbide rod. It is recommended to use the smallest possible surface load density (power). Please note that the value recorded on the cold end of the silicon carbide rod is the current and voltage at 1000°C in the air, which may not be consistent with actual use. Under normal circumstances, the surface power of silicon carbide rods is obtained from the relationship between the temperature in the furnace and the surface temperature of the silicon carbide rods. It is recommended to use the current and voltage of the limit density of the silicon carbide rods, which may not be consistent with actual use. Under normal circumstances, the surface power of silicon carbide rods is obtained from the relationship between the temperature in the furnace and the surface temperature of the silicon carbide rods. It is recommended to use the surface power of 1/2-1/3 of the limit density of the silicon carbide rods (W/cm2)
(3) When using silicon carbide rods continuously, it is desirable to increase the resistance slowly to maintain a long life.
(4) The silicon carbide rods are connected in parallel as much as possible. If the resistance values of the silicon carbide rods are different, the load of the silicon carbide rods with high resistance is concentrated when connected in series, resulting in a rapid increase in the resistance of a certain silicon carbide rod and a shorter life span.