Silicon carbide nozzle is made of new ceramic material, with high temperature resistance, oxidation resistance, high strength, extreme cold and heat resistance, good thermal shock resistance, small high temperature, good thermal conductivity, wear resistance, corrosion resistance and other characteristics. As an energy-saving refractory material, it is widely used in high temperature kilns in sanitary ceramics, daily porcelain, electric porcelain, magnetic materials, microcrystalline stone, powder metallurgy, iron and steel heat treatment and other industries, and various parts made of it are gradually used in power generation, paper making, petroleum, chemical industry, mechanical seal, water pump, surface treatment, heat exchange, mineral processing, aerospace and other fields.