Structural, optical, thermal, mechanical, morphological & radiation shielding parameters of Pr3þ doped ZAlFB glass systems

Vignesh, K R and Ramya, B and Nimitha, S and Wagh, Akshatha and Sayyed, M I and Sakar, E and Yakout, A H and Dahshan, A and Kamath, Sudha D (2020) Structural, optical, thermal, mechanical, morphological & radiation shielding parameters of Pr3þ doped ZAlFB glass systems. Optical Materials, 99. p. 109512. ISSN 0925-3467

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Authors have investigated a series of newly developed Pr3þ doped 10ZnF2 – (5-y) Al2 O3–30LiF – 55B2O3 – yPr6011 (y ¼0–0.5 mol %) glasses synthesized through melt quench technique with an objective to analyse its optical, structural, thermal, morphological, mechanical and radiation shielding capabilities. The structural evolution was systematically investigated by density, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and Energy dispersive analysis (EDAX). The overlaid absorbance (3H4→1D2) and emission (1D2→3H4) bands of 0.05 mol% of Pr3þ-doped ZAlFB glass indicated the cross-relaxation channel for energy transfer between Rare-Earth (RE) ions. The ZAlFB:Pr3þ glasses excited at 445 nm exhibited intense reddish orange emission with 1D2→3H4 transition at 605 nm. This proves its suitability in reddish orange LEDs. Luminescence quenching was observed past 0.05 mol% of Pr3þconcentration in ZAlFB glass. The 1D2→3H4 transition exhibited maximum branching ratio (βr ¼0.8601) in Pr0.5 glass. All the Pr3þ doped glasses revealed strong thermal stability with ΔT > 100 �C. Pr0.5 glass sample showed maximum thermal strength and mechanical hardness (Vicker’s Microhardness tester). Hence, compromise over the hardness or the optical properties of the samples were studied in the ZAlFB:Pr3þ glasses. Radiation shielding properties indicated 0.5 mol% Pr3þ doped sample as a superior gamma rays shielder among the investigated ZnF2–Al2O3–LiF–B2O3–Pr6O11 glass system with favourable luminescent and radiation shielding properties, these Pr3þ doped ZAlFB glasses can be used as photonic/lasing devices in radiation zones as well.

Item Type: Article
Uncontrolled Keywords: Praseodymium (Pr3þ) Fourier transform infrared spectroscopy WinXCom Differential scanning calorimetry (DSC) Photoluminescence Half-value laye
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 17 Mar 2020 09:50
Last Modified: 17 Mar 2020 09:50

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