...反射隔热涂料至少应具备以下四项特征：一、太阳反射比（solar reflectance）≥0.8；二、半球发射率（hemispherical emittance）≥0.8；三、在特定的测温条件下与标准试版有较大的温差；四、隔热稳定性强即在污染后隔热性能基本不变。
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... 半球发射率 hemispherical emissivity 半球发射率 hemispherical emissivity 半球日照仪 hemispherical pyrheliometer ...
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总半球发射率 hemispherical total emissivity
重点分析了散射反照率和散射相函数对介质层表观方向发射率和表现半球发射率的影响。
The influence of the scattering albedo and scattering phase function to the apparent emittance was investigated.
氟碳油漆也能满足隔热降温性能指标要求，阳光反射率和半球发射率均大于80% 3纳米ato既是红外辐射材料，又是导电材料。
Can meet the performance requirements of heat insulation and cooling, sunlight reflectivity and emittance are more than 80%3 of nano ATO is the infrared radiation material, and conductive material.
论述用辐射热平衡法（热丝法）测量材料半球全发射率的原理；
The principle of measuring the hemisphere integrated radiant emittance by the radiation heat-equilibrium method (filament method) was discussed.
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