Ferro silicon nitride powder

Ferro silicon nitride powder is a gray-white (or brownish-brown) powder, and ferro silicon nitride for steelmaking is a gray-white granule. Silicon nitride is a mixture of silicon nitride and iron, generally containing 75% ~ 80% (w) of Si3N4, 12% ~ 17% (w) of Fe, free Si is not more than 1% (w). Si3N4 in ferro silicon nitride has two crystal forms, α and β, both hexagonal crystals, and the iron element exists as α-Fe or (and) iron silicide form. Ferro silicon nitride has some excellent properties of Si3N4 because it contains Si3N4 phase, such as high refractory, good erosion resistance, high mechanical strength, good thermal shock resistance, low thermal expansion rate, high oxidation resistance and a series of advantages; It also has good sintering performance because it contains Fe plastic phase.