Carbon pastes are suspensions of carbon in a matrix of electrically conductive or insulating materials and commonly used in various applications, such as batteries, capacitors, and resistors.
The process of producing carbon paste typically involves the following steps:
- Preparation of the carbon source: The carbon source, which can be graphite powder or other forms of carbon, is usually ground and screened to the desired particle size.
- Mixing of the carbon source and binder: The carbon source is mixed with a binder, such as a paste of metal oxides or conductive polymers, to form the carbon paste.
- Dispersion and homogenization: The mixture is subjected to high-speed dispersion and homogenization to ensure a uniform distribution of the carbon particles.
- Filtering: The carbon paste is then filtered to remove any large particles or aggregates.
- Drying: The filtered carbon paste is then dried to remove any remaining solvents.
- Milling: The dried carbon paste may be milled to further refine its particle size and to increase its surface area.
The quality of the carbon paste, including its electrical conductivity and stability, is largely dependent on the composition of the binder, the particle size of the carbon, and the processing conditions used. Carbon paste processing is a complex and specialized area that requires a thorough understanding of materials science and processing technology.
Orbis Machinery offer mixers, blenders, dryers and ball mills for the carbon industry.