Best quality SiC Heating Elements Silicon Carbide rods
ISO and CE certificate
Long life 6--10 months
max temperature 1600 C
ED straight type silicon carbide rods is the high temperature silicon carbide sic heating elemements for furnace and kiln.
STA, a experience of more than 3 decade in manufacturing of Sic heating element silicon carbide rods, STA occupies a majority share in this range.
Sic heating element silicon carbide rods is a kind of non-metal high temperature electric heating element.It is made of selected super quality green silicon carbide as main material,which is made into blank,silicide under high temperature and re-crystallized. Max temperature 1600 deg C.
Production process: made into blank, silicided under high temperature and re-crystallized.
Character: high-applied temperature anti-oxidization ,anti-corrosion ,long service life ,little deformation, easy installation and maintenance.
Usage: sic heating element silicon carbide rods used in various high temperature electric furnaces and other electric heating devices, such as in the industries of magnet, ceramics, metallurgy ,glass, and machinery.
Type: we have rod ,u, w, h, gun, single spiral, double spiral, dumbbell, door like type sic heating element silicon carbide rods.
Sic heating element silicon carbide rods have rather large specific resistance. When it is heated in air and the surface temperature of the hot zone reaches 1050°C,it's resistance rate is 600-1400mm2/mm and its resistance value changes as the temperature rises which is negative value from room-temperature to 800 °C and is postive value nature over 800 °C .
The key factor to the optimum service life of the element is to select the surface load of the element correctly according to the furnace construction, atmosphere and temperature. The figure shows the relation between furnace temperatures, element temperature and element surface load under the condition that the element radiation is not obstructed.
We are the leading manufacturer of SiC products in China since 1971, Especilly in Sic heating element silicon carbide rods.
size and resistance
Sic heating element silicon carbide rods size:
2)Length of Hot zone(HZ):mm
3)Length of Cold end(CZ):mm
4)Length of Overall(OL):mm
Advices of using sic heating element silicon carbide rods
1) In order to keep furnace temperature and the charges uniform of each element, before installation resistance distribution must be carried.
2) As the element is very brittle, be careful while install and maintain to avoid any damage.
3) When start to operate the furnace, raise voltage slowly and gradually, never give full load at one time.
Physical properties of sic heating element silicon carbide rods
Recommend surface load of sic heating element silicon carbide rods
Furnace Temp (°c )
Surface load of hot zone (W/cm²)
Key factors affecting sic heating element silicon carbide rods life
1) Operating temperature
The higher temperature of STA sic heating element silicon carbide rods, the shorter the life. Oxidation accelerates and the life shortens especially when the furnace chamber temperature exceeds 1600 celsius. Therefore, it is recommended the surface temperature of STA shall be kept as low as possible when in use. Namely, it is necessary to minimize the difference in temperature between inside the furnace chamber and the STA sic heating element silicon carbide rods.
2) Surface loading
The surface loading density is expressed in terms of the electric power applied per square centimeter of the heating surface. As experience proves that the larger the surface loading density(electric power)of the element, the higher the surface temperature, but the higher the temperature, the shorter of the life of STA sic heating element silicon carbide rods. Thus the surface loading density, the furnace atmosphere and temperature are in proportion to the element's aging speed ad inversely proportional to the element's service life.
3) Type of operation-continuous or intermittent
Comparing STA sic heating element silicon carbide rods life between the case where it is continuously operated and in the case where it is intermittently operated, it is maximized in the former case. During operation, sic heating element oxidize at the surface, where a silica film is formed. With long, continued use this film gradually thickens, resulting in an increase in the resistance of the heating element. The silica film behaves abnormally by expanding or contracting at around the crystal transformation temperature(1270 celsius).If heating elements temperature goes up and down repeatedly around the temperature by intermittent use, the accumulated film will be destoryed repeatedly and oxidiation will be promoted. Therefore,when the temperature of the furnace chamber goes down to room temperature due to a power failure etc., the resistance may increase rapidly.