Product Description
High Temperature silicon carbide electric heating elements rods
Description
The silicon carbide heating element is a kind of non-metal rod or tube shape high temperature electric heating element. It is made of selected super purity green hexagonal silicon carbide as main material, which is made into blank and silicon crystal under high temperature of 2400ºC. In oxidizing atmosphere, its service temperature can reach 1450ºC and continuous use life can reach 2000 hours.
Type: we have rod, u, w, h, gun, single spiral, double spiral, dumbbell, door like type
Features
1. High strength and excellent shock resistance;
2. Heat source is free of noise and air pollution;
3. Anti-oxidization;
4. Anti-corrosion,
5. Long service life,
6. Little deformation,
7. Easy installation and maintenance.
8. Excellent specific rate of heat zone resistance and cold end resistance,
9. Avoiding over-temperature of cold ends to damage the furnace body.
10. Saving energy
Types and application
They are widely used in various high temperature electric furnaces under air, vacuum and other protection gas environments and other electric heating devices, such as industries of magnet, ceramics, powder metallurgy, glass and machinery, etc.
1. SW (Standard)
SW Silicon Carbides are used in applications ranging in temperature from 600ºC up to 1400ºC in both air and controlled atmospheres. Although the type of atmosphere used will determine the maximum recommended element temperature. This kind of silicon carbide elements can be mounted either vertically or horizontally.
2. U-TYPE
U shape Silicon Carbide is consists of two silicon carbide rod with same diameter. Each rod has both hot zone and cold end with identical resistance. Two rods are connected by the low resistance SiC. Also the connector could be used as holder according to different requirements.
3. W-TYPE
3-phase elements are available in 2 different types: SGC (Dumbbell), SGD(Standard).
These elements are self-bonded silicon carbide formed by re-crystallization of silicon carbide at high temperature. It consists of three high-purity silicon carbide rods connected at one end by a silicon carbide crossbar. SGC elements are designed for vertical installation in standard float glass bathes and SGD elements for horizontal installation. They can be connected directly on three-phase power supply and is a one-side terminal type which permits drawing out the terminals from the roof of the furnace.
4. Single Spiral Silicon Carbide and Double Spiral Silicon Carbide:
They are made from silicon Carbide powder, and have two shapes: single and double sprial silicon carbide heating element. They are widely used in all kinds of kilns and furnaces.
Products specification: Rod type, U type, W type (Three Phase type), Solid Rod type, Spiral type, 5 piece type (dual hot zone). Sizes are available from Dia 12mm, 14mm, 16mm, 18mm, 20mm, 25mm, 30mm, 31.7mm (1.25inch), 35mm, 38.1mm (1.5 inch), 40mm, 44.4mm (1.75 inch) to 54mm (2.125 inch) for all types.
Application of High quality ED (rod) type sic heating rod:
Silicon Carbide (SiC) heating elements can usually make use for furnace which temperature from 600-1600.
It can be directly used in an air atmosphere, without any protection atmosphere. It is extensively used in the
fields of metallurgy, ceramics, glass, machinery, analysis test, semiconductor, science & research and so on.
Product Parameters
Physical Property
Specific Gravity |
2.6~2.8g/cm3 |
Bend Strength |
>300kg |
Hardness |
>9MOH'S |
Tensile Strength |
>150Kg.cm3 |
Porosity Rate |
<30% |
Radiancy |
0.85 |
Chemistry Property
1.Antioxidation Property of Elements
The element start to being oxidized when heat to 800°C in air, and a SiO protect film will be generated in surface of hot zone when temperature get to 1000-1300°C ; cristobalite will be crystallized at 1300°C; the protect film get to a certain thickness when the temperature get go 1500°C which make the oxidation speed being very slowly to stable. if continue to heat to over 1627°C ,the protect film will be damaged and oxidation speed will be more rapid evidently and make the element damaged earlier.
Thought the element will be oxidized very slowly in course of application, it also will make the resistance increased following long time application, this phenonenon calls ageing , in order to lower the ageing speed, we use special technology to spread a protect film on the surface of hot zone in the course of production, which enhance the antioxidant property of element evidently and lengthen the service life.
2.The effects of alkali and alkaline metal oxide to elements.
The alkali and alkaline metal oxide will react with SiC at about 1300°C and generate silicate, which calls alkali-chemical corrosion, and can influence the glowing of element.
3.The effects to elements from melting metal
Some metals ,such as cobalt, nickel, chrome and so on, can corrade the element in high temperature melting state and affect the service life of element.
Electric Property
SIC heating elements has rather large specific resistance , when it is heated in air and the surface temperature of the hot zone reaches 1050ºC, it's resistance rate is 600-1400 mm2/mm (square millimetre , its resistance value changes as the temperature rises. From room-temperature to 800ºC is negative value , over 800ºC is positive value nature curve.
Ruglar size of the SiC Heating elements, special ones better with drawings:
Diameter |
Heating zone |
Cold zone |
Overall length |
Range of resistance |
Length |
Length |
8mm |
100-300mm |
60-200mm |
240-700mm |
2.1-8.6 ohms |
10mm |
100-300mm |
60-300mm |
240-900mm |
0.8-7.0 ohms |
12mm |
100-500mm |
150-350mm |
400-1200mm |
0.7-5.6 ohms |
14mm |
100-500mm |
150-350mm |
400-1200mm |
0.7-5.6 ohms |
16mm |
200-600mm |
150-350mm |
500-1600mm |
0.7-4.4 ohms |
18mm |
200-800mm |
150-400mm |
500-1600mm |
0.7-5.8 ohms |
20mm |
200-800mm |
200-600mm |
600-2000mm |
0.6-6.0 ohms |
25mm |
200-1200mm |
250-700mm |
700-2600mm |
0.4-5.0 ohms |
30mm |
300-2000mm |
250-800mm |
800-3600mm |
0.4-4.0 ohms |
35mm |
400-2000mm |
250-800mm |
900-3600mm |
0.5-3.6 ohms |
40mm |
500-2700mm |
250-800mm |
1000-4300mm |
0.5-3.4 ohms |
45mm |
500-3000mm |
250-750mm |
1000-4500mm |
0.3-3.0 ohms |
50mm |
600-2500mm |
300-750mm |
1200-4000mm |
0.3-2.5 ohms |
54mm |
600-2500mm |
300-750mm |
1200-4000mm |
0.3-3.0 ohms |
60mm |
600-2500mm |
300-750mm |
1200-4000mm |
0.3-3.0 ohms |
Company Profile
1. Our company is a high & new technology enterprise specially engaged in developing, manufacturing and selling SiC (silicon carbide) heating elements and Molybdenum disilicide (Mosi2) heating elements and silicon carbide protective pipes
2. It established in the year 2007, with more than 16 years experience for produciton.
3. Products are exported to USA, Germany, France, Poland, Spain,Turkey, Russia, Ukraine, Japan, Korea, Singapore, Vietnam, Thailand and Iran, etc.. They are highly approved by our customers all over the world.
Cultute