Nitrided Ferro Silicon

Nitrided ferro silicon for refractories is a kind of off-white (or dark brown) powder, and ferrosilicon nitride for steelmaking is off-white granular. Silicon nitride is a mixture of silicon nitride and iron, generally containing 75% to 80% (w) of Si3N4, 12% to 17% (w) of Fe, and free Si is not more than 1% (w). Si3N4 in ferrosilicon nitride has two crystal forms of α and β, both of which are hexagonal crystals, and the iron element exists in the form of α-Fe or (and) iron silicide.

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Application of Nitrided Ferro Silicon

Nitrided ferro silicon has some excellent properties of Si3N4 because it contains Si3N4 phase, such as high refractoriness, good corrosion resistance, high mechanical strength, good thermal shock resistance, low thermal expansion rate, high A series of advantages such as oxidation resistance; and because it contains Fe plastic phase, it has good sintering performance. At the same time, compared with silicon nitride, ferrosilicon nitride is cheaper and easier to carry out industrialization and production. Therefore, it has been used as a raw material for refractory materials, a high-temperature bonding phase and a high-temperature structural material, and has been widely used in blast furnaces Iron ditch castables and gun mud. In recent years, there have been more and more studies on ferrosilicon nitride materials and their applications in refractory materials.

Nitrided ferro silicon