Study on Variation of Short Wave Infrared Spectral Emissivity of High-Temperature Graphite Plate

Yutao Bian; Jun Pan; Lijun Jiang; Yehan Sun; Yu Cao; Bowen Fan

doi:10.3788/AOS202141.1030003

Journals >Acta Optica Sinica >Volume 41 >Issue 10 >Page 1030003 > Article

Acta Optica Sinica
Vol. 41, Issue 10, 1030003 (2021)

Study on Variation of Short Wave Infrared Spectral Emissivity of High-Temperature Graphite Plate

Yutao Bian¹, Jun Pan^1、*, Lijun Jiang¹, Yehan Sun¹, Yu Cao¹, and Bowen Fan²

Author Affiliations

¹Key College of Geo-Exploration Science and Technology, Jilin University, Changchun, Jilin 130026, China

²Beijing Institute of Control and Electronics Technology, Beijing 100032, China

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DOI: 10.3788/AOS202141.1030003 Cite this Article Set citation alerts

Yutao Bian, Jun Pan, Lijun Jiang, Yehan Sun, Yu Cao, Bowen Fan. Study on Variation of Short Wave Infrared Spectral Emissivity of High-Temperature Graphite Plate[J]. Acta Optica Sinica, 2021, 41(10): 1030003 Copy Citation Text

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Fig. 1. Experimental apparatus for measurement of emissivity

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Fig. 2. Change curves of radiance of each group

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Fig. 3. Spectral curves of emissivity of each group

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Fig. 4. Distribution of original measurement data

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Fig. 5. Synthetic uncertainty of emissivity at different temperatures

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Fig. 6. Fitted curves of emissivity-temperature

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Temperature /K	Mean /K	Median /K	Mode /K	Minimum /K	Maximum /K	Standard deviation /K
573	558.565	559.150	559.150	552.150	563.150	2.436
623	604.930	605.150	605.150	600.150	609.150	1.983
673	648.505	648.650	649.150	641.150	655.150	2.480
723	692.460	692.150	692.150	686.150	698.150	2.461
773	732.115	732.150	733.150	723.150	740.150	3.224
823	772.675	773.150	773.650	764.150	779.150	3.122
873	815.572	816.150	817.150	809.150	822.150	3.158
923	855.410	856.150	855.150	842.150	864.150	4.660

Table 1. Temperature distribution of each group

Combination of temperature /K	Q_A	f_A	Q_e	f_e	P	F	F_a
573,923	1.282	1	0.543	398	8.000×10^-107	939.770	3.865
573--923	2.227	7	1.692	1591	8.500×10^-285	299.170	20.150
573,623	0.009	1	0.578	398	1.459×10^-2	6.018	3.865
623,673	0.002	1	0.364	398	1.800×10^-1	1.804	3.865
673,723	0.036	1	0.398	398	3.538×10^-9	36.483	3.865
723,773	0.008	1	0.444	398	9.190×10^-3	6.852	3.865
773,823	0.010	1	0.419	398	2.750×10^-3	9.080	3.865
823,873	0.150	1	0.341	397	3.273×10^-33	174.070	3.865
873,923	0.055	1	0.298	397	2.480×10^-16	73.299	3.868

Table 2. Variance results for different combinations

Temperature /K	Mean	Median	Mode	Minimum	Maximum	Standard deviation
573	0.769	0.770	0.761	0.686	0.876	0.045
623	0.760	0.769	0.756	0.701	0.841	0.029
673	0.756	0.757	0.771	0.683	0.848	0.031
723	0.737	0.738	0.754	0.667	0.821	0.032
773	0.728	0.732	0.738	0.652	0.804	0.035
823	0.718	0.722	0.722	0.656	0.798	0.030
873	0.679	0.675	0.665	0.621	0.748	0.029
923	0.656	0.652	0.658	0.611	0.736	0.026

Table 3. Statistics for emissivity data

Wavelength /nm	a₀ /(10^-4 K^-1)	a₁	R²	Wavelength /nm	a₀ /(10^-4 K^-1)	a₁	R²
1300	-7.582	1.273	0.875	2000	-4.113	1.033	0.922
1400	-5.870	1.159	0.934	2100	-3.898	1.022	0.919
1500	-5.545	1.117	0.929	2200	-3.700	0.988	0.918
1600	-5.338	1.095	0.923	2300	-3.585	1.006	0.903
1700	-5.023	1.075	0.918	2400	-3.546	1.015	0.912
1800	-4.484	1.038	0.912	2500	-3.856	0.997	0.920
1900	-4.522	1.075	0.921

Table 4. Fitting parameters

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