粒度对样品辐射特性影响的实验研究

EXPERIMENTAL STUDY OF THE EFFECT OF GRIT SIZE ON THE RADIATIVE PROPERLIES OF SAMPLES

利用ＩＲＥ－１型红外辐射测量仪对不同粒度砂纸样品进行了（法向）光谱比辐射率的测试；测试波段为８～１４μｍ；测试温度分别为４０℃、５０℃和７０℃．通过对测试结果的分析，指出在粒度尺寸大于测试波长时，随着颗粒尺寸的减小，样品的光谱比辐射率将减小，相应的８～１４μｍ的平均比辐射率也有减小的趋势．

By means of the IRE-1 IR radiometer, the spectral emissivities of abrasive paper with different grit sizes were measured in the 8 ￣ 14 μm spectral band at temperatures of 40℃,50℃,70℃,respectively.It is indicated that the values of the emissivities go down with the decrease of the grit size when it is larger than the wave length.