Dumbbell Type Silicon Carbide Heating Elements
1High Quality
2Factory Price
3Fast Delivery
4Professional Customer service
Port: Qingdao/Tianjin
Minimum Order Quantity: 6 Piece/Pieces
Supply Ability: 9000 Piece/Pieces per Month
Payment Terms: L/C,T/T,Western Union
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Packaging 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.
One of the earliest heating element designs, the enlarged cold ends of the Dumbbell style/shape/type element were originally made over sized to increase cold end cross section, lowering electrical resistance, thereby lowering cold end operating temperature. Modern Dumbbell Yuhao Sic element, by contrast, employ an advanced technology to keep the terminal ends cool by virtue of the decreased resistivity of the lower resistance cold end material used in the manufacturing process.
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 |
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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with CE,ROHS certification
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Features: Ideal quality with decent price
1Not affected by draught,noise-free
2.no extra ventilation is require
3.8000 hours life.
Model No.: OT
Features: Perfect quality with decent price
1Not affected by draught,noise-free
2.no extra ventilation is require
3.8000 hours life.
Model No.: OYT
Features: Carbon fiber heating lamp
High quality, high efficiency heat transfer
Not harmful to human body
Long life more than 5000hrs