Activated Carbon for Friction Materials
Activated Carbon is another carbon used in today’s friction formulations. This Carbon has unique
properties such as adsorption, hardness and high surface area. Activated Carbons are added when
porosity is needed for sound damping or pedal feel, where well developed pore structure for odor
and smoke adsorption is required and to provide open pores that allow effective flow of viscous
fluids. Asbury can size any of our activated carbons to meet your needs.
Powdered Activated Carbon
Type of
Carbon
Coconut
Coal
Wood
Grade
5562
5583
5597
Pore
Volume
(cc/gm)
n/a
0.8
1.8
Pore Size
(nanometers)
≤2
2 – 50
50+
Surface
Area
( /gm)
1000
600
1200
Particle Size
90% -200 mesh
90% -325 mesh
90% -325 mesh
Granular Activated Carbon
Type of
Carbon
Grade
Lignite
Coal
Coconut
5506
5589
5586S
Pore
Volume
(cc/gm)
.95
.80
n/a
Mesh Size
12 x 20
12 x 40
12 x 40
Surface
Area
( /gm)
650
900
1100
Hardness %
70
90
98
Definitions
Pore Volume
Pore Size
Surface Area
Hardness
Total volume of pores present in a specified weight of carbon
The average width of a carbon molecule
The total surface area of solid carbon determined by nitrogen
adsorption or desorption data
Hardness is a measure of the activated carbon’s resistance to
attrition
Be Safe / Be Sure! Use Asbury for all your friction formulations!
Rev 7-27-16