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采用辐射能量法测量了三种烧蚀材料的中温光谱发射率。提出了由所测中温光谱发射率计算烧蚀材料的高温发射率的方法。此外，还推导出由不同波段的发射率计算材料总发射率的公式。
The medium-temperature spectral emissivity of three ablative materials was measured by radiant energy method. A method to calculate the high temperature emissivity of ablative material from the measured temperature spectral emissivity is proposed. In addition, the formula for calculating the total emissivity of the material from the emissivities of different wavebands is deduced.