How to Choose High-Performance Conductive Carbon Black

Conductive carbon black is a specialized type of carbon black that must possess certain fundamental characteristics to excel in its applications. These include a large specific surface area, minimal impurities that capture electrons, and a high degree of crystallinity.

Understanding Carbon Black Structure

The structure of conductive carbon black refers to the extent to which very fine carbon black particles aggregate into chain-like or grape-like formations. This structure is determined by the size, shape, and number of particles within each aggregate. The more particles comprising an aggregate, the higher its structural integrity. A higher structural integrity increases the likelihood of forming a conductive network, thereby enhancing conductivity.

Carbon black characterized by aggregates composed of numerous branched and cross-linked primary particles is referred to as "high-structure" carbon black. High structural integrity indicates a well-developed chain-like or grape-like structure, which facilitates the formation of robust spatial network channels that are resistant to disruption.

Advantages of High-Structure Carbon Black

High-structure carbon black particles are fine and densely packed in a net-like chain arrangement, offering a large specific surface area and a high number of particles per unit mass. This configuration is advantageous for forming chain-like conductive structures within polymers.

The porosity of carbon black, which correlates with its structural integrity, is typically characterized by its dibutyl phthalate (DBP) absorption value. A higher DBP absorption value indicates greater structural integrity and, consequently, superior conductivity.

In summary, when selecting conductive carbon black for your applications, prioritize those with high structural integrity, as evidenced by a large specific surface area and a high DBP absorption value. These attributes ensure optimal conductivity and performance in your end products.