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The main spheres of using materials based on silicon nitride and silicon carbide nowadays are:

• Iron metallurgy and non-ferrous metallurgy
• Energetics
• Machinery manufacturing

The main consumers of the major part of the nitride and carbide containing production are iron metallurgy and non-ferrous metallurgy. Herewith the dominating part comes to the refractory materials industry.

Silicon nitride bonded silicon carbide is used as a strengthening additive in unmolded refractories and is an essential component in some refractory makeup for device and brick production. Refractory materials made up of the pure silcion nitride are not used in iron metallurgy. Because of its high price, caused by the complex technology used and high prices for raw materials, silicon nitride goods are mostly used in machinery engineering and non-ferrous metallurgy. The main role of silicon carbide in iron metallurgy is to be a

binding component in silicon carbide refractory materials. Thanks to silicon nitride binder service, properties of silicon carbide refractories are upgraded significantly. Moreover silicon carbide simplifies the process of manufacturing high density goods. So in all cases silicium nitride added to silicon carbide refractories improves their characteristics. Silicon nitride bonded silicon carbide refractories possess high thermoresistance and durability, excellent stress cracking resistance, acid and alkalis attack, aggressive melts and metallic vapor exposure. This kind of refractories is widely used in refractory facing in blast furnaces.

Grades of of silicon nitro-carbide offered by NTPF Etalon Ltd