High-purity silicon nitride iron

Silicon nitride iron is a composite material that combines the high-temperature resistance and corrosion resistance of silicon nitride with the electrical conductivity of iron. Its unique physical and chemical properties make it widely applicable in various industrial fields.

I. Metallurgical Industry: Preparation of Special Steels and Alloys

During the steelmaking process, when added as a nitrogen alloying agent, it can increase the nitrogen content in the molten steel, refine the grains and improve the mechanical properties of the steel (such as strength, toughness, and wear resistance). In the foundry industry, it is used as a seed crystal agent in cast iron (such as ductile iron, malleable iron), promoting graphitization and improving the microstructure of the cast iron, enhancing its resistance to thermal fatigue and wear, and is suitable for high-temperature components such as engine blocks and exhaust pipes.

II. Fire-resistant Materials: Components of High-Temperature Industrial Kilns

By taking advantage of the high refractoriness (melting point approximately 1900℃), thermal shock resistance and slag erosion resistance of silicon nitride iron, it is used for the furnace lining, steel outlet bricks, and torpedo tank lining bricks of steel smelting furnaces; the roof plates and crucibles of ceramic sintering kilns, which can withstand temperatures above 1400℃ and do not react with molten materials; the high-temperature components of waste incinerators, which resist corrosion from acidic gases and molten salts.

III. Electronics and Semiconductor Industry: Heat Dissipation and Conductive Materials

Silicon nitride iron possesses both high thermal conductivity and excellent electrical insulation properties. It can be used as a heat dissipation substrate for insulated gate bipolar transistors and LED chips, solving the heat dissipation problem of high-power electronic devices. It is particularly suitable for applications in new energy vehicles, photovoltaic inverters, and other fields. In semiconductor etching and deposition processes, it is used to manufacture heat-resistant and plasma-corrosion-resistant carriers and spray nozzles, avoiding metal impurities and meeting the high purity requirements of semiconductor manufacturing.

IV. Wear-resistant and Corrosion-resistant Components: Mechanical Engineering

By applying silicon nitride iron powder through thermal spraying (such as plasma spraying) onto the mechanical surface, a wear-resistant coating is formed. This is suitable for pump impellers, valves, bearings, and sealing rings. As a coating material for hard alloy tools, it enhances the adhesion resistance and heat hardness of the tools, and is applicable for high-speed cutting of difficult-to-machine materials such as stainless steel and high-temperature alloys.