EFD仿真材料热辐射系数表
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Emissivity Coefficients of some
common Materials The radiation heat transfer emissivity coefficient of some common materials as aluminum, brass, glass and many more
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The emissivity coefficient - - indicates the radiation of heat from a 'grey body' according the Stefan-Boltzmann Law,
compared with the radiation of heat from a ideal 'black body'
with the emissivity coefficient = 1. The emissivity coefficient - - for some common materials
can be found in the table below. Note that the emissivity coefficients for some products varies with the temperature. As a guideline the emmisivities below are based on temperature 300 K.
Surface Material Emissivity
Coefficient - -
Alloy 24ST Polished 0.9
Alumina, Flame sprayed 0.8
Aluminum
Commercial sheet 0.09
Aluminum Foil 0.04
Aluminum
Commercial Sheet 0.09
Aluminum Heavily Oxidized 0.2 - 0.31
Aluminum Highly Polished 0.039 - 0.057
Aluminum Anodized 0.77
Aluminum Rough 0.07
Antimony, polished 0.28 - 0.31
Asbestos board and paper 0.94
Asphalt 0.93
Basalt 0.72
Beryllium 0.18
Beryllium, Anodized 0.9
Bismuth, bright 0.34
Black Body Matt 1.00
Black Parson Optical 0.95
Black Silicone Paint 0.93
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