Journal of Infrared and Millimeter Waves, Volume. 40, Issue 2, 204(2021)

The infrared spectral emissivity measurement of a graphite material in a high temperature range of 1000~1500℃ using integrated blackbody principle

Xu-Yao SONG, Wei DONG*, Yi-Jie PAN, Zun-Dong YUAN, and Xiao-Feng LU
Author Affiliations
  • Heat Division, National Institute of Metrology, Beijing 100029, China
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    Figures & Tables(13)
    Schematic of the integrated blackbody principle (a) A integrated blackbody formed by a sample on the cavity bottom coupled with the cavity wall, (b) a sample moved from the bottom to the mouth of the cavity
    Distributions of the radiance temperature of the integrated blackbody cavity at a nominal temperature of 1 000 ℃
    Simulation and validation results of the effective emissivity of the integrated blackbody
    Schematic of the emissivity measurement device using the integrated blackbody principle
    The spectral outputs of the integrated blackbody and the graphite material (a) The spectral outputs during the spectral emissivity measurement of a graphite material at a nominal temperature of 1 000 ℃ of the integrated blackbody, (b) The effective spectral outputs of the integrated blackbody and the graphite material in the measurement state at the nominal temperatures of 1 000 ℃, 1 300℃ and 1 500 ℃
    The measurement and comparison results of the infrared spectral emissivity of graphite
    Heat transfer model of a sample surface
    The maximum temperature drop evaluations of a graphite material
    Results of the SSE measurements
    Results of the linearity of the spectral responsivity
    Linearity correction coefficients of the spectral responsivity
    • Table 1. Uncertainties and evaluation methods of the materials infrared spectral emissivity measurements using integrated blackbody principle

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      Table 1. Uncertainties and evaluation methods of the materials infrared spectral emissivity measurements using integrated blackbody principle

      不确定度主项不确定度子项评定方法
      集成黑体发射率uεb
      集成黑体温场A
      集成控温稳定性A
      腔体材料辐射特性B
      观测因子比uK
      辐射源尺寸效应B
      距离效应B
      集成黑体-样品亮度比uRatio
      光谱亮度比测量重复性A
      FTIR响应度非线性B
      FTIR噪声B
      FTIR波数准确性B
      FTIR波数重复性B
      FTIR短期稳定性B
      环境杂散辐射A
      飞行动态温降修正因子uC
      LP4波长准确性B
      LP4滤波片带宽B
      LP4量程系数B
      LP4噪声B
      LP4辐射源尺寸效应B
      LP4短期稳定性B
      LP4非线性B
      示值精度B
      样品在腔底控温精度A
      飞行温降A
      样品定位精度B
      控温重复性A
    • Table 2. Summary of measurement uncertainties of the infrared spectral emissivity of the graphite material

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      Table 2. Summary of measurement uncertainties of the infrared spectral emissivity of the graphite material

      不确定度主项不确定度子项

      u(1 000 ℃)

      /(%)

      u(1 300 ℃)

      /(%)

      u(1 500 ℃)

      /(%)

      集成黑体发射率uεb
      集成黑体温场2.11.50.6
      集成黑体短期控温稳定性0.010.010.01
      腔体材料辐射特性0.10.10.1
      观测因子比uK
      辐射源尺寸效应0.050.060.08
      距离效应可忽略可忽略可忽略
      集成黑体-样品亮度比uRatio
      光谱亮度比测量重复性0.20.30.6
      FTIR响应度非线性0.50.50.6
      FTIR噪声0.010.010.01
      FTIR波数准确性0.010.010.01
      FTIR波数重复性0.00030.00030.0003
      FTIR短期稳定性可忽略可忽略可忽略
      环境杂散辐射0.0010.0010.001
      飞行动态温降修正因子uC
      LP4波长准确性可忽略可忽略可忽略
      LP4滤波片带宽可忽略可忽略可忽略
      LP4量程系数0.020.030.04
      LP4噪声0.010.020.02
      LP4辐射源尺寸效应0.060.080.12
      LP4短期稳定性0.10.130.17
      LP4非线性可忽略可忽略可忽略
      示值精度可忽略可忽略可忽略
      样品在腔底控温精度0.10.10.2
      飞行温降1.793.324.61
      样品定位精度0.0020.0020.002
      控温重复性0.010.010.01
      合成不确定度方正汇总行uεs/(%),k=12.823.694.75
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    Xu-Yao SONG, Wei DONG, Yi-Jie PAN, Zun-Dong YUAN, Xiao-Feng LU. The infrared spectral emissivity measurement of a graphite material in a high temperature range of 1000~1500℃ using integrated blackbody principle[J]. Journal of Infrared and Millimeter Waves, 2021, 40(2): 204

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    Paper Information

    Category: Research Articles

    Received: Jun. 23, 2020

    Accepted: --

    Published Online: Aug. 31, 2021

    The Author Email: Wei DONG (dongw@nim.ac.cn)

    DOI:10.11972/j.issn.1001-9014.2021.02.011

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