Time:2023.08.16Browse:1
Carbon graphite material is a powder structure material similar to refractory materials and concrete. Except for non-ferrous brushes and mechanical metal graphite products, which are formed as a whole with a certain strength by phase transformation of metal powder at sintering temperature, the powder particles of typical carbon graphite materials cannot spontaneously bond together even at high temperatures. In order for them to bond into a whole with a certain shape and strength, a certain amount of substance that can bond carbon powder particles or fibrous fine substances into a whole must be added, and this substance is called a binder.
The conditions that the adhesive should meet:
1) The adhesive should be able to mix with the main material to form a plastic substance.
2) The binder becomes a viscous liquid within an appropriate temperature range. And it can have good adhesion and adsorption with the particles of the main material, and has a large adsorption force.
3) The binder should be an organic substance with low ash content and exhibit a strong consolidation effect between the particle interfaces of the main material after carbonization.
4) After the binder melts into a liquid state, it can fully and uniformly wet the main material, penetrate into the gaps between the powder particles, and penetrate into the capillary tube with a radius of r.