Door-like Type Sic industrial heating element
1High Quality
2Factory Price
3Fast Delivery
4Friendly and Professional Service
Price Terms:FOB,CIF,EXW
Payment Terms: T/T,Western Union,MoneyGram,L/C
Minimum Order: Negotiatable
Delivery Port: Customized
Contact SupplierPackaging Detail: wooden box outside package, protective material and carton inside package
Delivery Detail: within 3-8 days after receiving the payment
1Production Process: Made into blank, silicided under high temperature and re-crystallized.
2Usage: It is widely used in various high temperature laboratory furnace and other electric heating devices, such as in the industries of magnet, ceramics, power metallurgy, glass, and metallurgy.
3Character: Higher temperature, antioxidation, anticorrosion, increasing temperature fast, low coefficient of thermal expansion and so on.
The linear expansion coefficient,heat conductivity and specific heat of element will change along with temperature change .And the relational data are the follows:
Temperature (°C) | linearexpansioncoefficient(10-6m/°C) | Heatconductivity(Kcal/M hr °C) | specific heat(cal.g°C) |
0 | / | / | 0.148 |
300 | 3.8 | / | / |
400 | / | / | 0.255 |
600 | 4.3 | 14-18 | / |
800 | / | / | 0.294 |
900 | 4.5 | / | / |
1100 | / | 12-16 | / |
1200 | 4.8 | / | 0.325 |
1300 | / | 10-14 | / |
1500 | 5.2 | / | / |
specific gravity | 2.6~2.8g/cm3 | Bend strength | >300kg |
Hardness | >9MOH’S | Tensile strength | >150Kg.cm3 |
Porosity rate | <30% | Radiancy | 0.85 |
SIC heating elements has 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 600-1400 mm2/mm ,its resistance value changes as the temperature rises. From room-temperature to 800°C is negative value ,over 800°C is positive value nature curve.
The key factor to the optimum servece life of the element is to select the surface load of the element correctly according to the furnace construction,atmosphere and temperature.Below figure shows the relation between fumace temperatures,element temperature and element surface load under the condition that the element radiation isn’t obstructed.
Recommend surface load
Furnace Temp°C | 1100 | 1200 | 1300 | 1350 | 1400 | 1450 |
Surface load of hot zone(WCM2) | <17 | <13 | <9 | <7 | <5 | <4 |
1) As the element is very brittle, be careful while install and maintain to avoid any damage.
2) It can be mounted either vertically or horizontally.
3) The length of hot zone should be equal to the width of furnace chamber or the furnace wall is easily burned.
4) The length of cold end is equal to the wall thickness plus the extended length of the cold end which is 50 ~ 150mm in order to cool the ends and to connect claps.
5) The diameter of furnace hole should be 1.4 ~ 1.6 times of that of cold end. If the furnace hole was too small or filler plugged too tight that Sic rods couldn't expand freely at high temperature, they would be broken.
6) If the furnace is new or has not been used for a long time, it must be dried before the operation. When drying them, it is better to use old elements or other heating elements.
7) In order to keep furnace temperature and the load-bearing uniform of each element, before installation, resistance distribution must be carried out. The resistance value deviation of each group should be below 10%.
8) When start to operate the furnace, raise voltage slowly and gradually, never give full load at one time, or the heating element will be damaged by over current impulse.
a). Outer diameter (OD)
b). Length of Hot zone (HZ)
c). Length of Overall (OL)
d). Resistance (at 1050°C +/-50°C)
e).Shank spacing(A):mm
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