M Type SiC Heating element

M Type SiC Heating element

Gate type silicon carbide rod description: Gate type silicon carbide rod is suitable for heating the bottom or both sides of large box type furnaces and trolley furnaces. It has the advantages of high temperature control accuracy, convenient wiring, and small temperature difference. The electrical properties of silicon carbide rod. Silicon carbide rod is a nonlinear resistor with large dispersion at room temperature. When heated with electricity, the anode value gradually decreases from room temperature to 850 ℃ C+50 ℃, and slowly increases between 800 ℃ -900 ℃. Therefore, the anode value is basically stable between 1050 ℃ C+50 ℃. At this time, the measured resistance is relatively standard and easy to match during installation. The chemical properties of silicon carbide rod. Silicon carbide rod has good chemical stability and can be used continuously in dry and clean air (1450 ℃) for up to 6000 hours. Long term use can react with oxygen and water vapor. To use silicon carbide rod reasonably, the following harmful gases should be avoided from contacting the components: hydrogen can damage the structure of the components. Reduce the mechanical strength of the original components. Nitrogen can prevent oxidation of components below 1200 ℃, and react with components above 1350 ℃, leading to component aging. The aging rate of the original component is fast in the first 500 hours of use, and slow thereafter, mainly due to the protective film on the surface of the component slowing down the oxidation of the component. The aging rate of silicon carbide rods depends on the operating temperature and surface load density of the components. To maintain a constant power of the silicon carbide rod and achieve ideal furnace temperature, it is necessary to use corresponding voltage regulators to adapt to the increasing resistance of the components during use.