| Type: | Tube Heater |
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| Material: | Silicon Carbide |
| Form: | Tube |
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| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Audited Supplier | SiC heating element is a type of non-metal high temperature resistances heating elements. The elements are made from fine quality a-SiC as its main raw material. The raw material is first made first in to a blank, followed by high temperature silication and recrystallization, and becomes high quality tube shaped heating elements. Compared with metal electric heating material, this type of non-metal elements is featured of high operation temperature, anti-oxidization, long service life, little deformation, easy installation and maintenance. Because of these advantages, SiC heating elements is widely used in various industries that require high temperature electric furnaces and heating devices. These typical applications include electronics, magnetic materials, powder metallurgy, ceramics, glass, metallurgy and machinery. SiC heating elements have excellent specific rate of heat zone resistance and cold end resistance, saving energy, long life, avoiding over-temperature of cold ends damaging furnace body. |
Physical Properties
| Density: 2.5 +/-0.1 g/cm3 Bending strength: 50 +/-10 Mpa at 20C Porosity rate: 23 +/-2 % Specific heat: 1.0 kj/kg.C at 20C~1300C Heat conductivity: 14~19 W/m.C at 1000C Linear expansion coefficient: 4.5 x 10^-6/C |
| 1. Antioxidant property of elements The element start to being oxidized when heat to 800? in air; a SiO2 protect film will be generated in surface of hot zone when temperature get to 1000~1300?; cristobalite will be crystallized at 1300?; the protect film get to a certain thickness when the temperature get to 1500? which make the oxidation speed being very slowly to stable. If continue to heat to over 1627?, 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 phenomenon 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 & alkaline metal oxide will react with SiC at about 1300? and generate silicate, which calls alkali-chemical corrosion, and can influence the glowing of element. 3. 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. |
| Related Keywords: SiC heating elements , SiC heater |
| SiC heating element has rather large specific resistance. When it is heated in air and the surface temperature of the heat-generating part reaches 1050C, Its resistance rate is 600~ 1400?m2/m. Its resistance value changes as the temperature rises. Room-temperature below 800C is negative value, over 800C is positive value nature curve. |
| Related Keywords: SiC heating elements |
| It is the key factor to the optimum service life of the element that correctly select from the surface load of the element according to the furnace construction, atmosphere and temperature. Left figure shows the relation between furnace temperatures, element temperature and element surface load under the condition that the element radiation isn't obstructed. Recommend surface load: Furnace Temp 1100?: Surface load <17 W/cm2;** Furnace Temp 1200?: Surface load <13 W/cm2;** Furnace Temp 1300?: Surface load <9 W/cm2;** Furnace Temp 1350?: Surface load <7 W/cm2;** Furnace Temp 1400?: Surface load <5 W/cm2;** Furnace Temp 1450?: Surface load <4 W/cm2.*** |
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.
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.
Suppliers with verified business licenses
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