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Weathering Induced Morphological Modification on the Thermal Diffusivity of Natural Pyrrhotite: a Thermal Lens Study by M. S. Swapna; V. Gokul; Vimal Raj; R. Manu Raj; S. N. Kumar; S. Sankararaman is a Materials Science article available to read on EtoBox.

What is Weathering Induced Morphological Modification on the Thermal Diffusivity of Natural Pyrrhotite: a Thermal Lens Study about?

Natural pyrrhotites have gained significant attention due to their interesting electronic, antimicrobial, and chemical properties. The present work attempts to explore the morphology-induced modifications in the thermal characteristics of natural pyrrhotite due to ageing. The morphological, elemental, structure, optical, and thermal characterisations help in understanding the effect of ageing. The effects of five years of ageing of the sample are (i) Field Emission Scanning Electron Microscopic analysis reveals a morphological transformation from flakes to agglomerated powder, (ii) elemental analyses suggest the ageing induced compositional modification (iii) the Tauc plot analysis shows a bandgap energy modification from 1.46 eV to 1.92 eV, (iv) X-ray Diffraction (XRD), Fourier Transform Infrared, and X-ray photoelectron spectroscopic studies affirm the formation of oxy-hydroxides (v) the XRD data indicates an increase of dislocation density, and (vi) Photoluminescence study shows a deep violet emission evidenced through the CIE plot. The study by the thermal lens technique shows a lowering of thermal diffusivity study by 23%, due to the morphological modifications, adsorbed/chemi

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Author

M. S. Swapna; V. Gokul; Vimal Raj; R. Manu Raj; S. N. Kumar; S. Sankararaman

Publisher

Informa UK Limited

Published

2021

Language

EN

Field

Materials Science (Physical Sciences)