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Silicon nitride resists chemical corrosion with amazing strength. It is resistant against almost all organic and inorganic acid solutions. It’s also a highly-performing electrical insulating materials.
Ceramics made of silicon nitride have many excellent properties. They are used for bearings as well as turbine blades.
Silicon Nitride as a Refractory MaterialThe excellent high temperature properties of silicon nitride are considered to make it a promising material for high-temperature structures. These include high high-temperature strengths, corrosion resistance and good wear resistance.
Application of ironmaking refractories
Recent years have seen significant improvements in the corundum-silicon-carbide-silicon-nitride products used for large-scale blast-furnaces. In the middle section and load-bearing part of coke kilns, large blast furnaces are commonly made from silicon carbide or silicon nitride.
2) Application in steelmaking Refractories
The bottom ladle material has been made of silicon nitride in recent years. The addition of silicon-nitride materials to the slideplate improves the wear and erosion resistance of the slideplate, as well as its service life. It also reduces the price of steel per ton for ladle refinement.
(3) Application to refractory smelting non-ferrous metals, such as copper, aluminum, zinc, etc.
Silicon nitride does not wet metal solutions at high temperature, so it is suitable for high-temperature products in the nonferrous metal smelting processes, such as thermowells. Smelting furnace linings. Container linings. Crucibles. Silicon nitride ceramic products have good thermal shock resistance and can be used stably for a long time at high temperatures or in high-temperature-low-temperature cycles.
(4) Application in kiln furniture materials
The ceramic shed consists of a silicon-nitride-bonded silicon carbide prepared by reaction sintering at high temperature in nitrogen atmosphere, using silicon carbide as a particle raw material with metal Si as a fine powder. This material has remarkably improved performance.
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