Zhu, C. orcid.org/0000-0002-5516-661X, Hobbs, M.J., Masters, R.C. et al. (2 more authors) (2020) An accurate device for apparent emissivity characterisation in controlled atmospheric conditions up to 1423 K. IEEE Transactions on Instrumentation and Measurement, 69 (7). pp. 4210-4221. ISSN 0018-9456
Abstract
Emissivity is a material property that must be measured before an accurate non-contact temperature measurement can be made. We have developed a novel instrument for measuring apparent emissivity under a controlled atmosphere, providing data for applications in radiation thermometry. Our instrument employs a split furnace, a sample-blackbody component, two custom designed radiometers and a controlled atmospheric system. We measure across the temperature range from 973 to 1423 K and spectral range from 0.85 to 1.1 lm; this range is matched to the majority of high temperature radiation thermometers. The sample and reference approximate-blackbody are heated and maintained in thermal equilibrium, with a temperature difference of better than 1 K at 1423 K. The combined standard uncertainty of the system is lower than 0.0590 (at k=2) over the whole temperature range. Apparent emissivity of type 304 stainless steel (SS304) was studied under different oxidising procedures. Nitrogen and compressed air were input into the system to control the oxidisation process. We elucidated the relationship between the apparent emissivity variations and the surface composition changes of SS304 during oxidisation. Our study aims towards accurate and traceable apparent emissivity data, with well investigated uncertainty, for use in radiation thermometry.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 IEEE. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/. |
Keywords: | emissivity; radiation thermometer; oxide; uncertainty; 304 stainless steel |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 03 Oct 2019 10:34 |
Last Modified: | 16 Dec 2021 11:07 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
Refereed: | Yes |
Identification Number: | 10.1109/tim.2019.2944504 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:151704 |