China from 1950s, began to study advanced structural ceramics, SiC refractory products also have a history of more than 60 years of research, SiC refractory materials have excellent high temperature performance, widely used in chemical industry, metallurgy, energy, machinery, building materials, cutting tools and other fields.
SiC refractory material is long known as a high-quality refractory material. With high strength, high thermal conductivity, high seismic resistance, oxidation resistance, wear resistance, erosion resistance and other excellent high temperature performance. There are many uses in metallurgy, energy, chemical industry and other industries. The original SiC refractory was only one year, with SIO2, silicate, and mullite serving as binders. Now high-tech SiC products can been widely developed, and has been put into production and application, such as silicon nitride combined with silicon carbide, silicon nitrogen combined with silicon carbide, reaction sintering silicon carbide, recryallized silicon carbide, silicon carbide and other SiC materials, materials and high temperature performance greatly improved. With the progress of production technology, SiC products are made into multi-purpose refractory materials according to different processes, and their high temperature performance is also better. For example, the American SiC company produces SI3N4 combined with SiC, high temperature folding resistance strength reached 44MPa, 3 times of ordinary SiC brick, cast alumina brick 20 times, clay brick 50 times, good antioxidant performance, the highest surface use temperature of 1750 degrees Celsius, and ordinary SiC brick is only 1500 degrees Celsius, other high temperature performance than ordinary SiC brick, chromium aluminum brick, clay brick is good. R-SiC, RBSC, SiSiC and other better performance, so that SiC refractory into a new application field, people have been paid widespread attention to, and achieved better use effect. However, there are some shortcomings in the current SiC refractory materials, such as antioxidant properties, and the improvement of high temperature strength, which need further research.