Carbon black
Carbon black is a black powder of amorphous carbon. Carbon black is the average diameter of 2 ~ 3nm spherical or chain particles formed, the internal is containing a diameter of 3 ~ 500nm microcrystalline structure, and a variety of free radicals can react. The specific gravity of the carbon black is 1.8 to 1.9, the specific gravity of the granular carbon black is 0.35 to 0.4, and the specific gravity of the powdery carbon black is 0.04 to 0.08. Hydrocarbons are carbonized at a high temperature of 800 ° C or higher for several milliseconds, and carbon black is obtained. With natural gas and petroleum fractions as raw materials, in the furnace for some combustion, get furnace black. In addition, according to the raw materials and the system of different slot method, acetylene method, thermal cracking method, lamp method, its use is not the same. Carbon black is mainly used as a rubber enhancer for the manufacture of automobile tires. The other is also used as a pigment (ink, plastic, paint), dry battery conductive agent, catalyst carrier, super-hard alloy material. About 70% of global carbon black for tire manufacturing, 20% used in other rubber, the remaining less than 10% for plastic additives, dyes, printing inks and other industries. ...