B4C 325# 200#-0 100#-0 for antioxidant additive

Boron  Carbide                                                                                         

B4C 325# 200#-0 100#-0 for antioxidant additive

B4C, also known as black diamond, is an inorganic substance with a chemical formula of B4C, usually gray-black micropowder. It is one of the three hardest materials known (second only to diamond and cubic boron nitride). It is used in gem grinding polishing tankarmor, bulletproof vests and many industrial applications. Its Mohs hardness is about 9.6

B4C is used as an antioxidant additive for low-carbon magnesia-carbon bricks and castables. It is used in the key parts of high temperature resistance and erosion resistance in the iron and steel industry.

A b4c-graphite thermocouple consists of a graphite tube, a boron carbide rod, and a boron nitride bushing between them. In inert gas and vacuum, the service temperature is as high as 2200°C. Between 600 and 2200°C, the potential difference has a good linear relationship with temperature.

At present, the use performance of low-carbon magnesia-carbon bricks is generally improved by improving the bonded carbon structure, optimizing the matrix structure of magnesia-carbon bricks, and adding high-efficiency antioxidants. Among them, graphitized carbon black composed of industrial grade B4C and partly graphitized carbon black is used. Composite powder, which is used as carbon source and antioxidant for low-carbon magnesia-carbon bricks, has achieved good results. The low-carbon magnesia-carbon bricks added with B4C have good conventional physical properties, oxidation resistance and thermal shock stability.

boron carbide is produced by high temperature smelting boric aid and carbon materails in electric furnaces.