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Introduction of carbon black

Carbon black is an amorphous carbon. Light, loose and very fine black powder with a very large surface area, from 10-3000m2 / g, is a carbon-containing substance (coal, natural gas, heavy oil, fuel oil, etc.) under incomplete air conditions or incomplete combustion or thermal decomposition The resulting product.

Carbon black generally refers to carbon simple particles. Generally, due to insufficient combustion of organic matter, the hydrogen and oxygen elements therein are converted into water. If the carbon element is not burned sufficiently, it will detach from the molecules and form carbon black. The furnace black production process can be used to obtain carbon black in almost all particle size ranges. The carbon blacks of the same variety have different particle sizes and exhibit a particle size distribution range. In general, the finer particles have a narrower particle size distribution. The finer the pigment black, the more contact points between the carbon black aggregates, and as a result, the stronger the cohesion between them, when the pigment black is mixed into the material, that is, the uniform distribution of the initial carbon black is started, the work to be done for dispersion It is large to separate the carbon black particles, and finally reaches the highest blackness and coloring.

There are two kinds of density of carbon black. One is true density, which is determined by the elements and structure (or crystal structure) that make up carbon black. Unless otherwise specified, the density of carbon black refers to the true density; the other is The pouring density or apparent density varies with the processing conditions of carbon black and needs to be measured frequently. The apparent density mainly provides the basis for the volume calculation of engineering equipment and packaging, storage and transportation containers.

Carbon black with small particle size and high structure has low pouring density. Carbon black with small particles, high structure, clean surface and large surface roughness has good conductivity.