Purification and investigation of tellurium rich Te-As-Se chalcogenide glass for extended far-infrared transmission

Prabhudessai, AG and Balaji, S and Biswas, K and Molla, AR and Vinoth, S and Ramesh, K and Dutta, S and Chauhan, AK and Singh, S and Dasgupta, R and Sarkar, P and Annapurna, K (2024) Purification and investigation of tellurium rich Te-As-Se chalcogenide glass for extended far-infrared transmission. In: Journal of Non-Crystalline Solids, 642 .

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Abstract

In the present study, tellurium-rich (45�55 mol) As-Se-Te chalcogenide glasses were synthesized and purified further to eliminate the impurities for achieving extended far infrared transmission. The glasses were characterized and studied for physical, thermal, optical, structural and mechanical properties. All the glasses have shown transparency in the wavelength range of �1.6�19 µm, with >45 transmission with impurities. The purification process through vacuum distillation has eliminated the oxide impurities in the glass and the glass displayed �52 T in the wide infrared region. The refractive index for purified glass decreased from 3.487 at 2 µm to 3.362 at 10 µm. The purified glass was heat treated for four hours, and the most dominant crystal phase, As2Te3 was observed in XRD analysis. Presence of sharp Raman peak at �120 cm�1 belonging to As2Te3 pyramids in heat-treated sample well agreed with the XRD results. © 2024 Elsevier B.V.

Item Type:	Journal Article
Publication:	Journal of Non-Crystalline Solids
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Chalcogenides; Crystal impurities; Distillation; Light transmission; Purification; Refractive index; Selenium compounds; Tellurium; Tellurium compounds; X ray diffraction, Chalcogenide glass; Far infrared; Impurities in; Optical spectroscopy; Purification process; Structural and mechanical properties; Synthesised; Thermal-optical; Vacuum distillation; Wavelength ranges, Glass
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	10 Sep 2024 05:28
Last Modified:	10 Sep 2024 05:28
URI:	http://eprints.iisc.ac.in/id/eprint/86000

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