Thermal Conductivity and Raman Spectra of Carbon Fibers

Thermal Conductivity and Raman Spectra of Carbon Fibers Due to its unique physical properties, carbon fiber (CF) has been widely studied for extensive application in aerospace and machinery. In this study, the thermal diffusivity of three kinds of CF sample is characterized by the transient electrothermal technique at room temperature. By subtracting the effect of radiative losses, the effective thermal diffusivity of CFs can be calculated as $$6.46\times 10^{-6}\,\hbox {m}^{2}\cdot \hbox {s}^{-1}$$ 6.46 × 10 - 6 m 2 · s - 1 , $$6.58\times 10^{-6}\,\hbox {m}^{2}\cdot \hbox {s}^{-1}$$ 6.58 × 10 - 6 m 2 · s - 1 and $$2.01\times 10^{-4}\,\hbox {m}^{2}\cdot \hbox {s}^{-1}$$ 2.01 × 10 - 4 m 2 · s - 1 , respectively. For the first time, the emissivity coefficient of carbon fiber is calibrated as 0.78. Combined with Raman spectra and phonon scattering, we found that the better crystalline structure and low defect in CF have an obvious impact on its thermal diffusivity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Thermophysics Springer Journals

Thermal Conductivity and Raman Spectra of Carbon Fibers

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC
Subject
Physics; Condensed Matter Physics; Classical Mechanics; Industrial Chemistry/Chemical Engineering; Physical Chemistry
ISSN
0195-928X
eISSN
1572-9567
D.O.I.
10.1007/s10765-017-2275-x
Publisher site
See Article on Publisher Site

Abstract

Due to its unique physical properties, carbon fiber (CF) has been widely studied for extensive application in aerospace and machinery. In this study, the thermal diffusivity of three kinds of CF sample is characterized by the transient electrothermal technique at room temperature. By subtracting the effect of radiative losses, the effective thermal diffusivity of CFs can be calculated as $$6.46\times 10^{-6}\,\hbox {m}^{2}\cdot \hbox {s}^{-1}$$ 6.46 × 10 - 6 m 2 · s - 1 , $$6.58\times 10^{-6}\,\hbox {m}^{2}\cdot \hbox {s}^{-1}$$ 6.58 × 10 - 6 m 2 · s - 1 and $$2.01\times 10^{-4}\,\hbox {m}^{2}\cdot \hbox {s}^{-1}$$ 2.01 × 10 - 4 m 2 · s - 1 , respectively. For the first time, the emissivity coefficient of carbon fiber is calibrated as 0.78. Combined with Raman spectra and phonon scattering, we found that the better crystalline structure and low defect in CF have an obvious impact on its thermal diffusivity.

Journal

International Journal of ThermophysicsSpringer Journals

Published: Aug 23, 2017

References

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