Emissivity
Staff posted on October 23, 2006 |
DESCRIPTION
COMPOSITION
TEMPERATURE (K)
EMISSIVITY
(E)
Aluminum oxide
(n)
600
0.69
 
 
1000
0.55
 
 
1500
0.41
Asphalt pavement
(h)
300
0.85-0.93
Building materials
 
 
 
Asbestos sheet
(h)
300
0.93-0.96
Brick, red
(h)
300
0.93-0.96
Gypsum or
plaster board
(h)
 
 
Wood
(h)
300
0.82-0.92
Cloth
(h)
300
0.75-0.90
Concrete
(h)
300
0.88-0.93
Glass, window
(h)
300
0.90-0.95
Ice
(h)
273
0.95-0.98
Paints
 
 
 
Black (Parsons)
(h)
300
0.98
White, acrylic
(h)
300
0.90
White, zinc oxide
(h)
300
0.92
Paper, white
(h)
300
0.92-0.97
Pyrex
(n)
300
0.82
 
 
600
0.80
 
 
1000
0.71
 
 
1200
0.62
Pyroceram
(n)
300
0.85
 
 
600
0.78
 
 
1000
0.69
 
 
1500
0.57
Refractories (furnace liners)
 
 
 
Alumina brick
(n)
800
0.40
 
 
1000
0.33
 
 
1400
0.28
 
 
1600
0.33
Magnesia brick
(n)
800
0.45
 
 
1000
0.36
 
 
1400
0.31
 
 
1600
0.40
Kaolin insulating brick
(n)
800
0.70
 
 
1200
0.57
 
 
1400
0.47
 
 
1600
0.53
Sand
(h)
300
0.90
Silicon carbide
(n)
600
0.87
 
 
1000
0.87
 
 
1500
0.85
Skin
(h)
300
0.95
Snow
(h)
273
0.82-0.90
Soil
(h)
300
0.93-0.96
Rocks
(h)
300
0.93-0.96
Teflon
(h)
300
0.85
 
 
400
0.87
 
 
500
0.92
Vegetation
(h)
300
0.92-0.96
Water
(h)
300
0.96
Total, normal (n), or hemispherical (h) emissivity of selected surfaces

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