Boron carbide is used as antioxidant additive in low carbon magnesia carbon brick and castable. It is used in the key parts of high temperature and erosion resistance in iron and steel industry.

Boron carbide graphite thermocouple consists of graphite tube, boron carbide rod and boron nitride bushing between them. In inert gas and vacuum, the temperature is up to 2200 ℃. The linear relationship between potential difference and temperature is good between 600 ℃ and 2200 ℃.

At present, the performance of low-carbon magnesia carbon brick is generally improved by improving the combined carbon structure, optimizing the matrix structure of magnesia carbon brick and adding high-efficiency antioxidants. The graphitized carbon black composite powder composed of industrial grade B4C and part of graphitized carbon black is used as carbon source and antioxidants for low-carbon magnesia carbon brick, and good results are achieved. The low carbon magnesia carbon brick with B4C has good conventional physical properties, oxidation resistance and thermal shock stability.