Silicon carbide materials in the ceramic and enamel industry
As a refractory material, silicon carbide is not only used in ferrous metallurgy and powder metallurgy, but also has high thermal stability, high temperature strength and high thermal conductivity, which ensures its effective application in ceramic and fine porcelain process.
Fine porcelain industry is the main user of SiC Refractory. It is used to make pillars and plates of tunnel kiln car frame, lining top and sagger.
The thickness and size of the plate and pillar are different, depending on the size of the car and the type of products. The load capacity of the kiln car can be increased by changing the size of the scaffolding components reasonably. Baking hollow porcelain products with a thickness of 25-30 mm silicon carbide plate. When baking small abrasive products on the shelf, the size of SiC plate used is 450 * 240 mm and the thickness is 22 mm; when baking heavy abrasive products, the plate thickness is 40 mm.
Because SiC refractories are much more expensive than clay bricks, only when the service life of SiC refractories is longer than that of clay bricks, the use effect of SiC refractories can be economically reasonable. To a great extent, the service life of SiC refractories depends on the rationality of the production process of SiC refractories, whether the structure and size of scaffolding components are appropriate, and whether its performance is compatible with the conditions and limit temperature of products baked on the scaffolds.
For example, when baking sanitary ceramics, high-voltage electric porcelain and abrasive products, the scaffolding on the kiln car bears a great load. Therefore, the strength of SiC products is of great significance. In view of the small thermal stress during calcination, dense SiC Refractory with strong oxidation resistance can be used.
High thermal stability of silicon carbide refractories is the first requirement for fine art porcelain products, daily-use porcelain, low-voltage electric porcelain and high-frequency ceramics.