INTRODUCTION

Silicon carbide has stable chemical properties, high thermal conductivity, small thermal expansion coefficient, and good wear resistance. In addition to being used as abrasive, it has many other uses. For example, coating silicon carbide powder on the inner wall of the turbine impeller or cylinder block with a special process can improve its wear resistance and extend its service life by 1 to 2 times; The high-grade refractory material made of it has the advantages of heat shock resistance, small size, light weight, high strength and good energy saving effect. Low grade silicon carbide (containing about 85% SiC) is a deoxidizer for *************. It can speed up steelmaking, facilitate the control of chemical composition and improve the quality of steel. In addition, silicon carbide is also widely used to make silicon carbide rods for electric heating elements.