Time：2023.05.05Browse：1
Graphite powder is a wear -resistant material, and its self -lubrication performance is its most important feature. Graphn powder has a good self -lubrication performance due to its special layer -shaped crystal structure. The following are the analysis of the reasons for the self -lubricating property of graphite powder:
The carbon atoms in graphite lattles are arranged in hexagonal on different planes. The distance between the carbon atoms in the same plane layer is 1.42 meters, and the distance between the carbon atom of each plane layer is 3.35. They are staggered along the same direction, repeat the position of the first plane in the third plane, the fourth plane repeats the position of the second plane, and so on. In each plane layer, because the carbon atoms are relatively tight, the binding forces between them are relatively large, and the carbon atom between layers and layers is far from each other, which is easy to separate and relatively slide. This is the main reason why graphite powder has excellent and self -lubricating performance.
Graphite powder has a strong adhesion for most metals. Therefore, when grinding with metal parts, the laminar graphite particles that have been shedding can easily adhere to the metal surface to form a layer of graphite. This has become a friction between graphite and graphite. Graphite is easy to slide relative to each other. In addition, graphite powder is easy to absorb water or oxygen in the air, and forms a water film on the surface of friction. These are why graphite powder has good self -lubricating performance.
2023-03-20Expanded graphite was discovered at the beginning of the 1860s, and many countries like to use it for research, which can achieve many unexpected results. How many times can expansion be magnified? That's right. It's twice as big or even times! It is a new carbon material! Many people don't know much about expanded graphite!
Raw material quality: The main raw material for graphite crucibles is natural graphite, and its quality is closely related to the service life of graphite crucibles. High quality natural graphite has the characteristics of high density, high purity, and high strength, which can extend the service life of graphite crucibles.
Graphene is a type of ² A new material in which hybrid connected carbon atoms are tightly packed into a single-layer two-dimensional honeycomb lattice structure. Graphene has excellent optical, electrical, and mechanical properties, and has important application prospects in materials science, micro/nano processing, energy, biomedical, and drug delivery. It is considered a revolutionary material in the future. Andre Geim and Konstantin Novoselov, physicists from the University of Manchester, UK, successfully separated graphene from graphite by micromechanical stripping method, so they jointly won the 2010 Nobel Prize in Physics. The common methods for producing graphene powder are mechanical stripping, redox, SiC epitaxial growth, and the film production method is chemical vapor deposition (CVD).Graphene has special significance for fundamental research in physics, as it enables some quantum effects that could only be theoretically demonstrated to be experimentally verified. In two-di2023-12-11The service life of graphite crucibles
2023-11-01Basic Research on Graphene
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