The carbon material in electrode paste is a kind of granular structure material, which is made by mixing, shaping, roasting and graphitization of various kinds of materials with different particle size by adding binder.In this paper, the main solid carbon
Main solid carbonaceous materials of electrode paste
Carbon material is a kind of granular structure material, it is made of various kinds of different particle size of raw materials, by adding binder, by mixing kneading, forming, roasting and graphitization.
Therefore, the performance of the material is not only related to the particle size, the type and amount of binder and the process control and operation in the production process, but also has an important relationship with the type and performance of the material itself.
There are many solid raw materials used in the production of carbon materials, such as ordinary petroleum coke, needle petroleum coke, asphalt coke, artificial graphite, natural graphite, carbon black, anthracite,
metallurgical coke, charcoal, sugar carbon, bone carbon, etc.
For electric carbon products, there are copper, silver, tin, lead and other metal powder and artificial resin;
For the mechanical use of carbon and furnace lining materials, there is silicon carbide, silicon dioxide, clay, and so on;
For carbon fiber and its composites, there are rayon, polypropylene, etc.
Although naturally carbon-containing minerals and manmade carbon materials are all essentially composed of carbon elements, they do not share the same physical and chemical properties.
The main reason is that their formation conditions are different, so the arrangement of carbon atoms and the bond between carbon atoms are different.
Some are crystalline, such as graphite and diamond;
Some are amorphous structure, such as petroleum coke, asphalt coke, anthracite, metallurgical coke.
It is also related to the nature and structure of the carbonaceous minerals themselves that produce these carbon materials, such as petroleum coke, metallurgical coke and anthracite, which have different properties.
Even for the same kind of mineral, the properties of carbon raw materials produced from different producing areas are not exactly the same, such as the properties of daqing petroleum coke and shengli petroleum coke.
Therefore, in the production of carbon materials, it is necessary to conduct in-depth and systematic research and understanding of different types of raw materials, and then study their impact on the performance of carbon materials, and then select and cooperate according to the performance requirements of the products, so as to find out the regularity and then guide the production.
At present, although a lot of achievements have been made in the study of carbon materials, accurate calculation and accurate description have not been made in the microscopic structure, even in the deeper level of chemical bond structure, electronic structure and energy band theory.
Based on the experience of long-term production practice, people summarized the application range of various main raw materials, and made a certain theoretical explanation on the macro level, the characteristics and application range of various main carbon raw materials.
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