Fabrication of photoacoustic cell and thermal diffusivity measurement of coal carbon black using it

Sarkar, Minarul I.; Kumar, Kaushal

doi:10.1016/j.matpr.2021.11.467

Cited by 7 publications

(2 citation statements)

References 11 publications

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“…12 Through PAS the thermal diffusivity could efficiently be measured and it is also used as multi-purpose spectroscopic technique in variety of scientific fields. [13][14][15][16][17] With the advent of lasers and sensitive acoustic sensors the sensitivity of PAS has now improved too much.…”

Section: Introductionmentioning

confidence: 99%

“…Schmitt et al 14 have measured the thermal diffusivity of caprocks and Jeyadheepan et al 15 have measured the thermal diffusivity of Cd 2 SnO 4 thin films using this technique. Sarkar and Kumar 16,17 have measured the thermal diffusivity of MoS 2 , MoS 2 -GO nano-composites, and carbon black samples. Authors have found that the addition of GO in MoS 2 increases the thermal diffusivity and this result has inspired authors to measure thermal diffusivity of graphene oxide (GO).…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of a photoacoustic cell and thermal diffusivity measurement of graphene oxide using photoacoustic spectroscopy

Sarkar

Upadhyay

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Photoacoustic spectroscopy (PAS) is an important technique for the characterization of materials by measuring the heat produced due to the non-radiative transitions. Here, the authors have fabricated a photoacoustic cell and made parametric studies to get maximum signal sensitivity. For the optimum signal, the cavity volume of the sample chamber is found to be 1.763 × 10–6 m3. After optimization of the cell, the thermal diffusivity of hummers method synthesized graphene oxide (GO) powder was measured using laser excitation at 980 nm and it is found to ∼(1.84 ± 0.10) × 10–4 m2/s. Also, the thermal diffusivity of the same sample was measured using 560 and 680 nm excitation wavelengths. No measurable change in thermal diffusivity with excitation wavelength is seen and it confirms that thermal diffusivity is independent of the excitation wavelength. Lastly, photoacoustic spectrum of the GO sample was measured in the 400–1200 nm range and compared with the spectrum of lamp black.

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