Normal emissivity of high-purity nickel at temperatures between 1440 and 1605K

Teodorescu, George; Jones, Peter D.; Overfelt, Ruel A.; Guo, Baojian

doi:10.1016/j.jpcs.2007.08.047

Cited by 25 publications

(6 citation statements)

References 16 publications

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“…For µ > 0, memory of field perturbations decays asymptotically with a decay strength dependent on the value of µ. As µ → 1, the limiting behavior of (7) in (6) is such that memory kernel behaves as the IID distribution δ(t), which implies the previously noted Markovian relaxation. The memory kernel given by (7) is such that in the stationary limit of (6), one arrives at the causal convolution:…”

Section: Theorymentioning

confidence: 76%

“…16 In Appendix A, we show that a more general approach can be taken with the memory kernel that nevertheless leads to (8). By combining (6), (7), and (8), and then inserting the result into (1), a temporally nonlocal macroscopic carrier transport model is obtained:…”

Section: Theorymentioning

confidence: 99%

“…3 The need for thermophysical models is also prevalent, with use cases including heat shielding design, 4 noncontact thermometry, 5 and engine component fabrication. 6 In all but the most idealized scenarios, the Drude model fails to completely account for experimental observations. [7][8][9][10][11] An everyday example of such behavior can be found in the infrared responses of transition metals with sufficiently complicated valence configurations.…”

Section: Introductionmentioning

confidence: 99%

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Temperature-dependent carrier transport: Low-complexity model for the infrared optical and radiative properties of nickel

Orosco

Coimbra

2019

Journal of Applied Physics

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We propose a framework for modeling the temperature-dependent infrared optical and radiative properties of metals exhibiting nonideal free-carrier dynamics. In order to do so, we derive a parsimonious model that possesses both multivariate (in temperature and wavelength) and single variate (in wavelength) components. The model is realized as the complex-valued relative permittivity, and is applicable to optically smooth media. A procedure is outlined for regressing both components of the model under an appropriate set of physical constraints that preclude superfluous degrees of freedom. The procedure is demonstrated by applying the model to nickel, a transition metal of technical significance that possesses nontrivial valency. The resulting model yields practically accurate results for eight data sets spanning four separate studies, representing the approximate wavelength (λ) bandwidth between 1 and 16 µm, and the approximate temperature (T) range between 0 and 1400 K. The proposed model framework retains phase information and can therefore be directly interfaced with more complex Fresnel frameworks, such as those commonly used for modeling systematically or randomly roughened surfaces.

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Section: Theorymentioning

confidence: 76%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Temperature-dependent carrier transport: Low-complexity model for the infrared optical and radiative properties of nickel

Orosco

Coimbra

2019

Journal of Applied Physics

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“…In order to characterize the thermal radiation performance, the emissivity is the essential parameter to determine the cooling efficiency of thermal radiation [6][7][8]. Evaluation of the emissivity of thermal protection materials is therefore an important problem in spacecraft design.…”

Section: Introductionmentioning

confidence: 99%

EFFECTS OF TEMPERATURE ON THE SPECTRAL EMISSIVITY OF C/SiC COMPOSITES

Lü¹,

Dai²,

Zhang³

et al. 2016

Ceramics - Silikaty

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The effect of temperature on the infrared spectral emissivity of C/SiC composites as a thermal protection material has been studied, using a measurement system based on a FT-IR spectrometer. The spectral emissivity of C/SiC composites in the wavelength range 3-20 μm and in the temperature range from 1000 K to over 2000 K was measured. Based on the analysis of the measured spectral emissivity, variations of the spectral emissivity with temperature were studied. The relationship between emissivity and temperature in some certain wavelength was found.

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“…Many measurement methods have been developed to measure the spectral emissivity of materials at various temperatures and spectral ranges. The direct measurement method of the spectral emissivity was widely used that compare the sample spectral intensity to the blackbody spectral intensity at the same temperature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. For example, Rozenbaum et al [4] used a spectroscopic method to measure the directional spectral emissivity of semi-transparent materials for wavelengths of 10-12000 cm À1 and temperatures of 600-3000 K with the sample heated by a carbon dioxide laser.…”

Section: Introductionmentioning

confidence: 99%