Conductive Carbon Black
The following is an introduction to conductive carbon black:
Definition and Characteristics
- Definition: Conductive carbon black is a type of carbon black with low - resistance or high - resistance properties, which can endow products with conductive or anti - static characteristics.
- Characteristics: It has small particle size, large specific surface area, rough surface, high structure, and clean surface (with few compounds). It also has advantages such as high electrical and thermal conductivity, low production cost, oxidation stability, and low density. It is easy to process and form, and has a reinforcing effect on materials.
Classification
According to the degree of conductivity, it can be divided into ordinary conductive carbon black, super - conductive carbon black, and special - conductive carbon black.
Production Process
- Raw Material Preparation: Carbon - containing materials such as petroleum, natural gas, coal, or calcium carbide are selected as the starting materials. The raw materials are pretreated by processes like cleaning and drying to remove impurities.
- Carbonization: The pretreated raw materials are placed in a heating furnace and heated to a high temperature above 1000°C to undergo a carbonization reaction, generating partial carbon black and gaseous by - products. The preliminary carbon black product is obtained by controlling the reaction conditions and time.
- Pyrolysis: The carbonized material is fed into a pyrolysis furnace and further heated in an oxygen - free or low - oxygen environment for a deep pyrolysis reaction to produce high - purity carbon black.
- Oxidation (Optional): To improve the dispersibility and operability of the carbon black, some of the carbon black can be sent to an oxidation furnace for oxidation treatment. By controlling the degree of oxidation and reaction time, carbon black with a certain amount of surface functional groups is generated.
- Reduction: The oxidized carbon black is subjected to a reduction treatment to remove the surface oxides in the reduction furnace and restore its electrical conductivity. Appropriate reduction temperature and time need to be controlled.
- Pulverization and Classification: The reduced carbon black is finely pulverized to obtain the required particle size and meet the performance requirements. Then, through processes such as screening and classification, impurities and large particles are removed to improve the purity and quality of the product.
- Post - treatment: The carbon black is treated with oil immersion to increase its adhesiveness and fluidity, and then dried to remove moisture, ensuring the stability and quality of the product. Finally, it is packaged.
Application Fields
- Battery Field: In lithium - ion batteries, it can be added to the positive and negative electrodes to improve electron transfer ability, construct lithium - ion migration channels, and extend the cycle life. In nickel - metal hydride batteries and nickel - cadmium batteries, it is applied to the negative electrode, which can reduce electrode polarization and improve charge - discharge performance.
- Rubber and Plastic Products Field: It is used to manufacture antistatic rubber products, such as antistatic rubber sheets and antistatic conveyor belts. It can also be used to produce conductive plastic products, such as conductive films and conductive fibers, which are important in fields like electronic packaging and electromagnetic shielding.
- Cable Material Field: When added to the shielding layer of cables, it can effectively shield external electromagnetic interference, ensuring stable and accurate power signal transmission. It can also homogenize the electric field distribution, reduce local electric field concentration, and lower the risk of partial discharge. At the same time, it can improve the processing performance of cable materials and enhance mechanical strength and wear resistance.
- Electronic Printing and Coating Industry: When added to inks and coatings, it can be used in fields such as printed circuit boards, electronic displays, and electromagnetic shielding coatings. It can also be used to manufacture antistatic clothing, smart textiles, etc. It can also be used in screen - printing inks to produce various conductive printed products.
- Other Fields: In fuel cells, it can be used as an electron carrier and catalyst carrier to improve power generation efficiency and performance. In supercapacitors, it can improve the electrical conductivity and capacitance performance of the electrodes. In the aerospace and military fields, it is used to manufacture antistatic and electromagnetic shielding materials.
| Product name: |
Carbon black |
| Appearance: |
black powder |
| CAS No.: |
1333-86-4 |
| EINECS No.: |
215-609-9 |
| Molecular formula: |
C |
| Molecular weight: |
12.01 |
| Melting point: |
3550 °C |
| Boilting point: |
4827ºC |
| Storage Conditions: |
Room Temprature |
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