Silicon nitride combined with silicon carbide has high strength, good comprehensive mechanical properties, and excellent oxidation resistance. Good wetting resistance to non-ferrous metals, with a maximum operating temperature of 1500 ℃. In the daily porcelain and sanitary porcelain industries, due to its lightweight, energy-saving, higher loading and qualification rates, longer service life, improved work efficiency, and stable performance, it can be reused more than 2000 times. In the non-ferrous metal industry, it has good corrosion resistance and stable quality.