The difference between conductive carbon black and acetylene carbon black

Author : Clirik

 Conductive carbon black is a general term. It is a special type of carbon black that has stronger electrical conductivity than ordinary carbon black and pigment carbon black. According to the electrical conductivity, from low to high, it can be divided into CF conductive carbon black, SCF superconductive carbon black, XCF special conductive carbon black, and acetylene carbon black. In terms of production methods, it can be divided into three categories: acetylene carbon black, heavy oil furnace carbon black, and heavy oil gas by-product carbon black.
Acetylene carbon black is a kind of conductive carbon black. It usually refers to the high-performance carbon black obtained by making acetylene from calcium carbide, isolating the air at high temperature and thermally cracking the purified acetylene gas, then cooling and collecting it, commonly known as acetylene black. Compared with other carbon blacks, acetylene carbon black has the following characteristics: light weight and small specific gravity; large specific surface area and strong adsorption; stable chemical properties; good surface activity and high conductivity; high purity, low ash and volatile content. Acetylene black is mainly used for electrical conductivity, thermal conductivity, anti-static, coloring, reinforcement and other functions.

conductive carbon black

(Note: the above picture is cited from Wikipedia.)
The structure of carbon black is expressed by the degree to which carbon black particles aggregate into chains or grape shapes.
At present, the oil absorption value is commonly used to indicate the structure. The larger the oil absorption value, the higher the structure of the carbon black, which is easy to form a spatial network channel and is not easy to damage. High-structure carbon black has fine particles, tightly packed network chains, large specific surface area, and many particles per unit mass, which is conducive to the formation of chain conductive structures in polymers. Carbon black particles with a wide particle size distribution can impart more conductivity to the polymer than carbon black particles with a narrow distribution. Statistical methods can be used to explain this phenomenon. For carbon black with a wide particle size distribution, a few large-diameter particles need a huge number, and small diameter particles are compensated. Carbon black with the same average particle size distribution has a larger total number of particles than carbon black with a narrow distribution.

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