Summary of silicon carbide.
Silicon carbide is a kind of green silicon carbide as main raw materials according to certain proportion after recrystallization hydraulic preliminary forming, baking, sintering and hot cold resistance, 2400 degrees of secondary sintering and into a straight bar type, U type, W type and so on the many kinds of shapes of the resistance electric heating element.
The element is the highest temperature can reach 1450 degrees, the temperature reaches 1200 degrees can generate a density of glass rod surface strong oxide thin film, the film will no longer be blocked itself oxidation, thus greatly extend the life span of the rod. Due to the unique high temperature resistance, oxidation resistance is widely used in metallurgy, ceramics, glass, electronic, magnetic materials, such as high temperature areas. Become a tunnel kiln, roller kiln, glass furnace, vacuum furnace and muffle furnace, melting furnace and all kinds of heating equipment is the ideal energy efficient and environmentally friendly high temperature resistant material electric heating elements
The surface of the silicon carbide coating
Now in order to improve again for the service life of silicon carbide, the coating on the surface of silicon carbide processing, have protective coating on silicon carbide has two kinds, one is white coating, is to protect some water vapor or gas stove exclusive research and development of a kind of coating, white coating is mainly used in the nitrogen furnace, can delay the nitrogen gas nitriding of components, so as to improve the service life of silicon carbide.
Another coat looks shiny black. The temperature resistance of the coating is higher, won't melt in 1300 ~ 1500 degrees, can water vapor from the surface of silicon carbide, rise to extend the silicon carbide with water vapor under the condition of life. The coating cost table is larger, and after besmear is good in the high temperature furnace heating coating even, laborious. So the price of this element is also higher.
