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 has many excellent properties, as a new functional material, such as high and low temperature resistance, non-toxic and harmless, environmental protection and energy saving, and is recognized as one of the most valuable and promising products among carbon materials. one. In the future, with the continuous optimization and upgrading of the industrial structure in traditional application fields and the vigorous development of strategic emerging industries.
The shape of expanded graphite is worm-like, so it is also called graphite worm. A graphite worm is made up of multiple “micelles” linked together. There are many small pores in the microcells, forming a rich pore structure of expanded graphite. It has many excellent properties. It not only retains many advantages of natural graphite, such as high temperature resistance, electrical conductivity, thermal conductivity, lubricity, special thermal shock resistance, chemical stability and corrosion resistance, but also It has the characteristics of developed pore structure, high reactivity, large specific surface area, high compressibility and high elastic modulus that natural graphite does not have.
Expandable graphite’s important potential
The introduction of expanded graphite into carbon composite refractories is expected to solve a series of problems caused by the reduction of carbon content in materials. The porous structure of expanded graphite itself determines its high compressibility and high elastic rate. Adding expanded graphite to carbon composite refractories can effectively absorb thermal stress and improve the thermal shock stability of the material. Expanded graphite has a unique spatial structure and excellent physical and chemical properties. Researchers usually pre-treat expanded graphite to meet applications in different fields. Due to the large number of graphite layers of expanded graphite, it can be used as a reaction carrier for chemical treatment or physical coating on its surface to meet the applications in the fields of electrochemistry, magnetism and photocatalysis.
In addition, since expanded graphite can be regarded as being composed of countless graphene oxide nanosheets superimposed on each other, it can be exfoliated to prepare graphene oxide nanosheets, which can be applied to ceramic materials.
