Conductive carbon black and conductive graphite conduct electricity differently
Conductive carbon black is a kind of carbon black with low or high resistance properties produced according to the semiconducting properties of carbon black. Its conductivity has a great relationship with the structure of carbon black.
The conductivity of graphite powder mainly depends on its carbon content, degree of graphitization, split particle size, shape and other factors. In addition to high electrical conductivity, conductive graphite powder also has the characteristics of corrosion resistance, wear resistance, high temperature resistance, high strength, and light weight.
Comparison of conductive carbon black and conductive graphite
When it comes to conduction, for carbon, the one with excellent conductivity is graphitized carbon. It is not difficult to see from this point that the conductivity of graphite is better than that of carbon black. Of course, this requires the purity of the two to be high.
The reason why conductive carbon black is more used than conductive graphite
In the field of carbon black, we all know that the conductive materials used in plastic systems are almost all conductive carbon black instead of graphite powder. This is mainly because the factors that play a conductive role in plastics are not only the conductivity of the added conductive powder itself, but also related to the distribution of conductive particles in the polymer. The same quality of carbon black and graphite, due to the relatively small specific gravity of carbon black, occupies a larger volume fraction in polymer compounds such as plastics, which is conducive to the formation of a conductive network and thus obtains a better conductive effect than graphite powder as a filler. . Therefore, in plastic applications, we often see conductive carbon black instead of graphite powder.
Although in a sense the conductivity of graphite is better than that of carbon black, the application of graphite is not as much as that of conductive carbon black. It can be seen that the use of suitable products is more critical than the best.