Synthesis and properties of tellurite based glasses containing Na2O, BaO, and TiO2: Raman, UV and neutron/charged particle shielding assessments

Alzahrani, Jamila S.; Lebedev, A. V.; Avanesov, Samvel A.; Hammoud, Alaa; Alrowaili, Z.A.; Mahmoud, Zakaria M. M.; Olarinoye, I.O.; Al-Buriahi, M.S.

doi:10.1016/j.ceramint.2022.03.092

Cited by 22 publications

(1 citation statement)

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“…The absence of absorption peaks satisfies the essential factors for nonlinear behavior in optical fibers, namely minimum absorption and low cutoff wavelengths [40]. However, a predominantly strong absorptive band in the UV region at 280 nm and high transmittance in the visible and near IR regions are observed, which also increases with doping [41,42]. Equation ( 7) represents the Davis-Mott equation to predict the optical direct bandgap energy due to the allowed transitions.…”

Section: Uv-visible Spectral Analysismentioning

confidence: 99%

Multifunctional praseodymium-doped composite silica glasses for UV shielding and photonic applications

Gracie

Geetha²,

Battisha³

2023

J. Phys. D: Appl. Phys.

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Silica phosphate glasses strengthened with calcium oxide modifier and doped with different concentrations (0%, 0.5%, 1%, 1.5 mol%) of praseodymium (Pr3+) were synthesized by sol-gel method. The absence of sharp peaks in the x-ray diffraction (XRD) spectra confirms non-crystallinity of the glasses. Higher doping indicates increasing optical band gaps due to Burstein Moss shift, which also reflects on structural disorders at the absorption tails as validated by Urbach’s rule. The density increases with a subsequent decrease in oxygen packing density, proving the mechanical and chemical stability of the glasses. The composite glasses are multifunctional with marked absorption at 280 nm predicting its purpose as UV shielding films. Luminescence corresponding to the intra 4f transition, 〖1_D〗_2→〖1_G〗_4 in the IR region, with high transmission and low reflection losses suggests the use of the synthesized glass material for S-band telecommunications, while the radiative process involving 〖3_P〗_0→〖3_F〗_2 yields a predominant red laser source. Commission International de l’Eclairage (CIE) color coordinates observe warmer red emission corresponding to Correlated Colour Temperature (CCT) of 3200 K. The composite silica phosphate glass systems evidence the effective role of Pr3+ for photonic applications.

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Section: Uv-visible Spectral Analysismentioning

confidence: 99%