Silicon carbide rod is a kind of high-temperature electric heating element, which belongs to the less popular industry in the field of carbide, but it is widely used and must be equipped in smelting, casting, new energy, military and other related fields. It has a high specific resistance. When the surface temperature of heating part is 1050 ± 50 ℃, the resistivity is 0.0735 ~ 0.0168 Ω· cm2 / cm. The resistance of SiC rod changes with the increase of temperature. High purity green hexagonal silicon carbide as the main raw material, according to a certain material ratio processing billet, after 2200 ℃ high temperature silicification recrystallization sintering and made of rod, tubular non-metallic high temperature electric heating element. In oxidizing atmosphere, the normal use temperature can reach 1450 ℃, and the continuous use can reach 2000 hours.

Basic properties of silicon carbide rod:

The silicon carbide rod has the characteristics of high temperature resistance, oxidation resistance, corrosion resistance, fast temperature rise, long service life, small deformation at high temperature, convenient installation and maintenance, and good chemical stability. Silicon carbide rod has good chemical stability, acid has no effect on it, but alkali and alkaline earth metal oxides have erosion effect on it at a certain temperature. At high temperature, water vapor, hydrogen, halogen and sulfur also have oxidation and erosion effect on it. Therefore, the above environment should be avoided as far as possible.

Industry specification of silicon carbide rod:

The models of silicon carbide rods include 3-section rods, 5-SECTION rods, U-shaped rods, H-shaped rods and gun shaped rods. In short, 5-SECTION bar should be used in the case of high homogenization requirement, otherwise 3-section bar should be used; H-type bar or U-type bar should be used when single terminal connection is needed; gun type bar should be used for material pot. The specification of silicon carbide rod refers to diameter, length of heater, length of cold end, length of bridge, center distance, etc. The length of the cold end of the straight bar (3-section bar and 5-SECTION bar) depends on the thickness of the furnace wall, and the length of the heating element must correspond to the width of the charging tank, generally not less than the width of the charging tank.

High temperature fields such as electronics, magnetic materials, powder metallurgy, ceramics, glass, semiconductors, analysis and testing, scientific research, etc. have become the electric heating elements of tunnel kiln, roller kiln, glass kiln, vacuum furnace, muffle furnace, smelting furnace and all kinds of heating equipment.