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Emissivity
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| 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 |
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|
1500 |
0.57 |
| Refractories (furnace liners) |
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| Alumina brick |
(n) |
800 |
0.40 |
| |
|
1000 |
0.33 |
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|
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 |
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|
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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