Simultaneous Measurement Method of Normal Spectral Emissivity and Optical Constants of Solids at High Temperature in Vacuum

2010 ◽  
Vol 31 (10) ◽  
pp. 2010-2018 ◽  
Author(s):  
K. Nakazawa ◽  
A. Ohnishi
Keyword(s):  
High Temperature ◽  
Simultaneous Measurement ◽  
Measurement Method ◽  
Optical Constants ◽  
Spectral Emissivity ◽  
Normal Spectral Emissivity

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

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 235
Author(s):  
Tong Zhang ◽  
Xuyao Song ◽  
Gongjin Qi ◽  
Baolin An ◽  
Wei Dong ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Barrier Coating ◽  
Radiation Thermometry ◽  
Spectral Emissivity ◽  
Standard Uncertainty ◽  
Thermal Barrier ◽  
Normal Spectral Emissivity ◽  
Zro2 Coating ◽  
Barrier Coating ◽  
Relative Standard

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.

New experimental device for high-temperature normal spectral emissivity measurements of coatings

2014 ◽  
Vol 25 (9) ◽  
pp. 095501 ◽  
Author(s):  
Petra Honnerová ◽  
Jiří Martan ◽  
Martin Kučera ◽  
Milan Honner ◽  
Jacques Hameury
Keyword(s):  
High Temperature ◽  
Spectral Emissivity ◽  
Experimental Device ◽  
Normal Spectral Emissivity ◽  
Emissivity Measurements

MODELING THE NORMAL SPECTRAL EMISSIVITY OF BRASS H62 AT 800–1100 K DURING OXIDE LAYER GROWTH

2018 ◽  
Vol 49 (15) ◽  
pp. 1445-1458
Author(s):  
Deheng Shi ◽  
Fenghui Zou ◽  
Zunlue Zhu ◽  
Jinfeng Sun
Keyword(s):  
Oxide Layer ◽  
Spectral Emissivity ◽  
Layer Growth ◽  
Normal Spectral Emissivity
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