Piecewise linear calibration of Fourier spectral measurement system responsivity based on the high temperature blackbody

Xuyao, 宋旭尧 Song; Qingduo, 端木庆铎 Duanmu; Wei, 董伟 Dong; Zhibin, 李志彬 Li; Xiaofeng, 卢小丰 Lu; Zundong, 原遵东 Yuan

doi:10.3788/irla201948.0718002

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“…The spectral output S of the FTIR is a dimensionless value, which can be obtained by direct output of FTIR. It is defined by the spectral radiance L , and given by [ 20 ]:

where R is the spectral responsivity. Above 1000 °C, the environment background spectral radiance L env is several orders of magnitude lower than the spectral radiance of the integrated blackbody L ibb , so can be ignored.…”

Section: Resultsmentioning

confidence: 99%

Investigation of High-Temperature Normal Infrared Spectral Emissivity of ZrO2 Thermal Barrier Coating Artefacts by the Modified Integrated Blackbody Method

Zhang

Song

et al. 2021

Materials

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Zirconium oxide (ZrO2) is widely used as the thermal barrier coating in turbines and engines. Accurate emissivity measurement of ZrO2 coating at high temperatures, especially above 1000 °C, plays a vital role in thermal modelling and radiation thermometry. However, it is an extremely challenging enterprise, and very few high temperature emissivity results with rigorously estimated uncertainties have been published to date. The key issue for accurately measuring the high temperature emissivity is maintaining a hot surface without reflection from the hot environment, and avoiding passive or active oxidation of material, which will modify the emissivity. In this paper, a novel modified integrated blackbody method is reported to measure the high temperature normal spectral emissivity of ZrO2 coating in the temperature range 1000 °C to 1200 °C and spectral range 8 μm to 14 μm. The results and the associated uncertainty of the measurement were estimated and a relative standard uncertainty better than 7% (k = 2) is achieved.

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“…The spectral output S of the FTIR is a dimensionless value, which can be obtained by direct output of FTIR. It is defined by the spectral radiance L , and given by [ 20 ]:

Section: Resultsmentioning

confidence: 99%

Investigation of High-Temperature Normal Infrared Spectral Emissivity of ZrO2 Thermal Barrier Coating Artefacts by the Modified Integrated Blackbody Method

Zhang

Song

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

Piecewise linear calibration of Fourier spectral measurement system responsivity based on the high temperature blackbody

Cited by 1 publication

References 0 publications

Investigation of High-Temperature Normal Infrared Spectral Emissivity of ZrO2 Thermal Barrier Coating Artefacts by the Modified Integrated Blackbody Method

Investigation of High-Temperature Normal Infrared Spectral Emissivity of ZrO2 Thermal Barrier Coating Artefacts by the Modified Integrated Blackbody Method

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