Use and Care Guide

63
Emissivities of Common Materials (Con’t)
Material
Temperature

°C

Emissivity
Tin
Commercial tin plate 100 0.07
Strong oxidization
0200
0.60
Zinc
Oxidizing at 400°C 400 0.01
g
alvanized shinin
g
iron plate 28 0.23
Ash zinc oxide 25 0.28
NON-METAL MATERIALS
Brick 1100 0.75
Fire brick 1100 0.75
Graphite (lamp black)
96225
0.95
Porcelain enamel (white) 18 0.90
Asphaltum
0200
0.85
Glass
(
surface
)
23 0.94
Heat-resistance glass
200540 0.850.95
Calcimine 20 0.90
Oak 20 0.90
Carbon piece 0.85
Isolation piece
0.910.94
Sheet metal
0.880.90
Glass pipe 0.90
Loop t
y
pe 0.87
Porcelain enamel
products
0.90
Porcelain enamel
designs
0.830.95
Solid materials
0.800.93
Ceramics
(
vase t
y
pe
)
0.90
Film
0.900.93
Mica
0.940.95
Flume mica
0.900.93
Glass
0.910.92
Semiconductor
0.800.90
Transistor (plastics sealed)
0.300.40
Transistor (metal)
Diode
0.890.90
Transmitting loop
Pulse transmission
0.910.92
Level chalkiness layer
0.880.93
Top loop
0.910.92
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