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Emissivity tables 21
Table 21.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification; 3:
Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Asbestos powder T 0.40–0.60 1
Asbestos slate 20 T 0.96 1
Asphalt paving 4 LLW 0.967 8
Brass dull, tarnished 20–350 T 0.22 1
Brass oxidized 100 T 0.61 2
Brass oxidized 70 SW
0.04–0.09 9
Brass oxidized 70 LW 0.03–0.07 9
Brass oxidized at 600°C 200–600 T 0.59–0.61 1
Brass polished 200 T 0.03 1
Brass polished, highly 100 T 0.03 2
Brass rubbed with 80-
grit emery
20 T 0.20 2
Brass sheet, rolled 20 T 0.06 1
Brass sheet, worked
with emery 20 T 0.2 1
Brick alumina 17 SW 0.68 5
Brick common 17
SW
0.86–0.81 5
Brick Dinas silica,
glazed, rough 1100 T 0.85 1
Brick Dinas silica,
refractory 1000 T 0.66 1
Brick Dinas silica, un-
glazed, rough 1000 T 0.80 1
Brick firebrick 17
SW
0.68 5
Brick fireclay 1000 T 0.75 1
Brick fireclay 1200 T 0.59 1
Brick fireclay 20 T 0.85 1
Brick masonry 35
SW
0.94 7
Brick
masonry,
plastered 20 T 0.94 1
Brick red, common 20 T 0.93 2
Brick red, rough 20 T 0.88–0.93 1
Brick refractory,
corundum 1000 T 0.46 1
Brick refractory,
magnesite 1000–1300 T 0.38 1
Brick refractory, strongly
radiating 500–1000 T 0.8–0.9 1
Brick refractory, weakly
radiating 500–1000 T 0.65–0.75 1
Brick silica, 95% SiO
2
1230 T 0.66 1
Brick sillimanite, 33%
SiO
2
, 64% Al
2
O
3
1500 T 0.29 1
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