23
UK
10.2.3 Emissivities for TW2001, TW2101, TW2011, TW2002
TW2001, TW2101,
TW2011
(λ = 1.1...1.7 μm)
TW2002
(λ = 0.78...1.06 μm)
Material
[%]
[%]
Aluminium, polished
5
15
Aluminium, finished
10
25
Asbestos cement
60
70
Bronze, polished
1
3
Bronze, finished
15
30
Chromium, blank
15
30
Iron, heavily scaled
90
95
Iron, rolling skin
75
90
Iron, molten
15
30
Gold and silver
1
2
Graphite, finished
85
90
Copper, oxidised
70
90
Brass, oxidised (tarnished)
50
70
Nickel
8
20
Porcelain, glazed
50
60
Porcelain, rough
75
85
Soot
90
95
Chamotte
40
50
Slag
80
85
Black body
100
100
Pottery, glazed
85
90
Brick
85
90
zinc
40
60