Expandable graphite from ACS Material is a specially synthesized intercalation compound of graphite. Graphite’s flaky, layered structure makes it possible to introduce outside atoms or small molecules between the graphite layers. This process is called intercalation and the result is an expandable graphite salt or a graphite intercalation compound (GIC.) The material gets its name because, when exposed to heat, the intercalated graphite layers expand and separate like an accordion. The final expanded volume can be hundreds of times greater than the initial volume of the material. The intercalation agent and the proportion of intercalated layers determine the temperature at which expansion begins and the rate at which expansion occurs.
Expansion of the flake graphite decreases the material’s overall bulk density while increasing its surface area; this change yields a material that demonstrates increased chemical reactivity over the original material. Expandable graphite is valued as a flame retardant. Expansion creates an intumescent layer on the surface of the graphite flake that slows the spread of fire and minimizes the creation of toxic fumes and gases.
Expandable graphite is also a component in a number of additional applications, including:
- Plastic foils
- Rubber products
- Heating and cooling systems
- Energy storage systems
- Sealing systems
- And many others
*This product has been discontinued.
New Products List
|SKU||Mesh||Purity (%)||Expansion Start
|Expansion Volume (ml/g)||Properties/Highlights||Package Size|
|CXG5C022||50||≥98||175||≥350||High purity, very high free expansion and expansion strength||200g|
|CXG5B022||50||≥99||180||≥250||High purity, soft ash, for application require least instruments damage||200g|
|CXG5B122||50||≥95||180||≥250||Standard product for all main applications||200g|
|CXG8B122||80||≥95||180||≥230||For main application in EPS, XPS foam, sealing strip and PU foam||200g|
|CXGAA222||150||≥92||175||≥150||Mainly used in fabric coatings, fire-resistant coatings, fire-resistant adhesives and EPS and XPS flame retardants||200g|
|CXG22022||-200||≥94||180||≥20||Finest particle size, min 80% below 75mircon for coatings, impregnation||200g|
|CXG21122||-100||≥95||180||≥35||Fine particle size, min80% below 150micron/100mesh||200g|
Please also take a look at our Lower Temperature Expandable Graphite.
| Expansion Volume
Research Citations of ACS Material Products