The spectral emissivity of natural surfaces measured with a Fourier transform infrared spectrometer

Lindermeir, Erwin; Tank, Volker

doi:10.1016/0263-2241(94)90026-4

Cited by 7 publications

(6 citation statements)

References 6 publications

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“…The emissivity ε reflects the thermal radiation characteristic of a blackbody, which is the ratio of the radiation of a perfect blackbody emitted at temperature T [37]. The radiance emitted by the conversion films are given by Planck's law where L is the spectral radiance emitted, ε (λ, T) the emissivity, λ the wavelength, T the temperature, c l the first radiation constant (3.74 × 10 −12 W m 2 ) and c 2 the second radiation constant (1.44 × 10 −2 m K) [38].…”

Section: Resultsmentioning

confidence: 99%

“…In this work, the emissivities of the conversion films were measured by means of FTIR. More detailed presentations on this are found in references [38,39]. Radiometric characterisation is given by where S ( λ ) is the measured spectrum, L ( λ ) the spectral radiance of the object, R ( λ ) the spectral response of the instrument, and G ( λ ) the instrument radiance.…”

Section: Resultsmentioning

confidence: 99%

“…where L is the spectral radiance emitted, ε (λ, T) the emissivity, λ the wavelength, T the temperature, c l the first radiation constant (3.74 × 10 −12 W m 2 ) and c 2 the second radiation constant (1.44 × 10 −2 m K) [38].…”

Section: Emissivitymentioning

confidence: 99%

Section: Emissivitymentioning

confidence: 99%

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Preparation of chemical conversion super-black films on ZK61M magnesium alloy

Yan

Tan

Yuan

2018

Surface Engineering

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Four different super-black conversion films on ZK61M magnesium alloys were investigated in this work. Macro-and micro-morphologies of the conversion films were observed using a digital camera and scanning electron microscope, respectively. Salt spray testing and electrochemical measurements were used to examine the corrosion resistance of the conversion films. The emissivities of the conversion films were measured using the Fourier transform infrared spectrometry. The results show that all conversion films reduced the corrosion rate of the magnesium alloy substrates effectively; in particular, the film prepared using 230 g L −1 HF + 150 g L −1 Na 2 Cr 2 O 7 •2H 2 O + 2.5 g L −1 CaF 2 mixed solution had a higher corrosion resistance. Moreover, the emissivities of the conversion films prepared using 230

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Emissivitymentioning

confidence: 99%

Section: Emissivitymentioning

confidence: 99%

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Preparation of chemical conversion super-black films on ZK61M magnesium alloy

Yan

Tan

Yuan

2018

Surface Engineering

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“…The Fourier transform infrared (FTIR) spectrometer is a powerful instrument for measuring infrared emission with a good spectral resolution. Many studies on instrumentation and methods with the FTIR spectrometers [3][4][5] have been performed for measuring the spectral emissivity of materials. However, when we use the FTIR spectrometer for emission measurement, it is necessary to consider carefully the problems [6,7] such as nonlinearity of the response and phase error in the interferogram, which affect the accuracy of the spectral radiance seriously.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty estimation for emissivity measurements near room temperature with a Fourier transform spectrometer

Ishii

Ono

2001

Meas. Sci. Technol.

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A Fourier transform infrared (FTIR) spectrometer was developed to measure spectral radiance of thermal-infrared emission near ambient temperatures with high accuracy at the NMIJ (former NRLM). The spectrometer uses a simple Michelson interferometer that consists of corner cube mirrors and a KBr beam splitter. The spectral range between 5 µm and 12 µm was covered by a liquid nitrogen cooled photovoltaic HgCdTe detector operated in the photoamperic mode. Opaque solid samples with good thermal conductivity were heated directly by the thermostatic fluid up to 100 °C. To reduce the effect of absorption by air, all of the optical components were operated in the vacuum. The spectrometer was calibrated against two high quality reference blackbodies: a fixed-temperature blackbody cooled by liquid nitrogen and a variable-temperature blackbody operated in the temperature range between -20 °C and 100 °C. We measured the normal spectral emissivity of alumina ceramic samples and determined the uncertainties. The combined standard relative uncertainties for the alumina samples at 100 °C was smaller than 1% when the emissivity was close to unity, and less than 3% when the emissivity was approximately 0.2.

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Spektroskopische Temperaturmessung

Bernhard

2004

Technische Temperaturmessung

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The spectral emissivity of natural surfaces measured with a Fourier transform infrared spectrometer

Cited by 7 publications

References 6 publications

Preparation of chemical conversion super-black films on ZK61M magnesium alloy

Preparation of chemical conversion super-black films on ZK61M magnesium alloy

Uncertainty estimation for emissivity measurements near room temperature with a Fourier transform spectrometer

Spektroskopische Temperaturmessung

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