silicon carbide heater

silicon carbide heater w

silicon carbide heater(w)product detail：

silicon carbide heater

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, silicate under high temperature and re-crystallized. compared with metal electric heating element, this kind of element is characterized by high-applied temperature, anti- oxidization, anti-corrosion, long service life, little deformation, easy installation and maintenance. therefore, it is widely used in various high temperature electric furnaces and other electric heating devices, such as in the industries of magnet, ceramics, powder metallurgy, glass, metallurgy and machinery, etc.

we adopt new production process for cold ends, so our 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 to damage the furnace body. the commercial name of our sic heating elements is cen—tai sic heating elements.

specs and type of cen-tai sic heating elements

chemistry property of elements silicon-carbide heater

1.antioxidant property of elements

the element starts to being oxidized over 800℃ in air; and a sio2 protective film will be generated on the 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 be heated to over 1627℃ the protect film will be damaged and oxidation speed will be more rapid evidently and make the element damaged earlier.though the elements will he 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 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 1300oc 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 corrode the element in high temperature melting state and affect the service life of element.

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