The determination of the conductivity of special conductive carbon black is usually done by measuring the powder resistance ratio of dry carbon black. That is to say, the special conductive carbon black is compressed with a metal plunger electrode in a cylinder with a high constant pressure or constant volume, and its resistance value is measured and the specific volume resistance is calculated. The former is called the constant pressure method and the latter is called the constant volume method. The pressure level used for the constant pressure method is 100-130 kilograms per cubic centimeter. The specific resistance measured by the constant volume method for high structured carbon black can better reflect its relationship with application.
The microstructure of special conductive carbon black: Carbon black particles have a microcrystalline structure. In carbon black, the arrangement of carbon atoms is similar to graphite, forming a hexagonal plane. Usually, 3-5 such layers form a microcrystal. Due to the ordered arrangement of carbon atoms in each graphite layer of carbon black microcrystals, and the disordered arrangement of carbon atoms between adjacent layers, it is also called quasi graphite crystal.
Specially conductive carbon black can generally be used in industries such as batteries and electronics that require large filling quantities. Stable quality, high coloring, easy to disperse. Can endow the adhesive with good conductivity. Special conductive carbon black has a small particle size, a large and rough specific surface area, a high structure, and a clean surface (with fewer compounds). It has anti-static properties and can also impart conductivity to the product, with low and high resistance functions.