Expandable Graphite
Size
0.50mm or 0.106mm, etc
Package
25 kg small bags into ton bags
Origin
China
Features
Preservative/Electrical and thermal conductivity, etc.
Application
Fireproof sealing element, flame retardant, refractory brick, etc.
Expandable graphite crystal is a typical layered carbon material. Other heterogeneous particles such as atoms, molecules, ions, and even atomic clusters are inserted into the interlayer of crystalline graphite by physical or chemical methods to form a new layered compound, which is called graphite interlayer compound, namely expandable graphite.
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Expanded graphite is a graphite product obtained by chemical treatment with natural flake graphite as raw material. It has good thermal conductivity, soIt is loose and porous, and also has the characteristics of being compressible, flexible and elastic. It does not deform or decompose under high temperature and high pressure. This stable chemical property brings it a wide range of uses.
Relationship between mesh and the expansion ration in expanded graphite
Expanded graphite has a special color with soft texture, strong resilience and compressibility, and has gained rapid popularity as a sealing material in our country. It replaces traditional sealing materials such as rubber and asbestos, and solves the water leakage problem of the equipment very well. The environment has a revolutionary improvement. It is widely used in heat insulation and flame retardant products because of its rapid expansion when exposed to heat. Among them, when choosing it, according to the different expansion multiples required, different target numbers of expanded graphite should be selected, so as to achieve the best effect.
The current mainstream standards for expanded graphite are 50 mesh, 80 mesh, and 100 mesh. Why should we choose these mesh numbers? Because the mesh numbers. High expansion graphite is not easy to expand, and the expansion ratio is low. Generally speaking, the expansion factor of expanded graphite is 100-300 times. You can choose the product that suits you according to your needs. We can customize production according to customer needs.
Factors related to the creep of expanded graphite
1. The creep of expanded graphite increases with the increase of temperature and the increase of applied stress and time. At lower temperature, It takes a long time to detect significant creep. But at higher temperatures, creep increases almost linearly. The deformation is mainly dependent on the temperature. At a lower temperature, the time increases several times and the creep does not increase much, but when the temperature increases hundreds of times, the creep will multiply.
2. The research found that the creep value of is also proportional to the magnitude of the applied stress. At the same temperature and within the same time period, the greater the applied stress, the greater the creep value. The creep of expanded graphite is also related to the final heat treatment temperature of graphite. The graphite with higher heat treatment temperature has smaller creep at the same temperature and the same applied pressure.
The Franli factory conducts various tests and analysis of expansion temperature, expansion volume, etc. Expanded graphite widely used for flame retardant industry and other industries.
