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Expandable Graphite

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SKU# 148

Product Detail

CAS No.: 7782-42-5

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:

  • Batteries
  • Coatings
  • Plastic foils
  • Rubber products
  • Heating and cooling systems
  • Energy storage systems
  • Sealing systems
  • And many others
 
Product No.

Expansion

Start

Temperature

(EST‚ °C)

pH Mesh

Packing Density

(mg/cm3)

Expansion Volume
(EV‚ ml/g)
Property
EG-175-350 175 7.0 50 0.5 350

Highest Expansion

Volume

*EG-170-400 170 7.0 80 0.5 400

Highest

Expansion Volume

EG-180-250

180 7.0 80 0.5 250  
EG-250-180 250 7.0 80 0.5 180  
EG-300-170 300 7.0 80 0.5 170

Highest Expansion 

Start Temperature

 

*This product has been discontinued.

Please also take a look at our Lower Temperature Expandable Graphite.

Products No.

Expansion

Start

Temperature

(EST‚ °C)

pH   Mesh  

Packing Density

(mg/cm3)

 Expansion Volume
(EV‚ ml/g)
 Property
EG-110-230 110 7.0 80 0.6 230

Super-low Expansion 

Start Temperature

EG-150-230  150 7.0  80 0.6 230  

 

Research Citations of ACS Material Products