With the development of high-temperature technologies such as iron and steel smelting, the development and research of high-quality and efficient refractory materials and raw materials are imminent. Synthetic raw materials are increasingly used as a promising refractory material. Ferrosilicon nitride (Fe-Si3N4) is a new type of synthetic raw material that has emerged in recent years. It is prepared using FeSi75 iron alloy as raw material, using nitriding technology and high-temperature synthesis technology.
Because of the Si3N4 phase, ferrosilicon nitride has some excellent properties of Si3N4, such as high refractoriness, good corrosion resistance, high mechanical strength, good thermal shock resistance, low thermal expansion rate, and high A series of advantages such as oxidation resistance; and it has good sintering performance because it contains Fe plastic phase. At the same time, compared with silicon nitride, ferrosilicon nitride is cheaper, and it is also convenient for industrial promotion and production. Therefore, it has been used as a refractory material, high-temperature binding phase and high-temperature structural material, and has been widely used in blast furnaces. Iron ditch castables and gun mud. In recent years, more and more researches have been made on ferrosilicon nitride materials and their applications in refractory materials, and some results have been achieved. In this article, the synthesis and characteristics of ferrosilicon nitride and its application in castables, gun mud and composite refractories are introduced, and the prospects for it are given.
At present, ferrosilicon nitride is mainly used in refractory materials such as castables, gun mud and composite refractories
