FTIR and Raman spectroscopic study of sodium aluminophosphate and sodium aluminum-iron phosphate glasses containing uranium oxides

Stefanovsky, S. V.; Stefanovsky, O.I.; Кадыко, М. И.

doi:10.1016/j.jnoncrysol.2016.04.031

Cited by 39 publications

(12 citation statements)

References 29 publications

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“…4b), 373 cm −1 for NiAl 2 O 4 (Fig. 4c)) that were attributed to the Al–O octahedral vibration, 31,32 as well as a low-intensity band near 500 cm −1 that was attributed to metal–oxygen bonding, specifically to the symmetrical Al–O stretching related to octahedral groups, 17,33 verifying the X-ray diffractometry results. Bands near 400 cm −1 (Fig.…”

Section: Resultssupporting

confidence: 75%

Color stability of blue aluminates obtained from recycling and applied as pigments

et al. 2023

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Section: Resultssupporting

confidence: 75%

Color stability of blue aluminates obtained from recycling and applied as pigments

et al. 2023

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“…In general, glass properties are determined by its composition and, to a large degree, its structure. Aluminophosphate glasses doped with MnO are a mixture of network formers and modifiers with a complex composition [4,5,9,10,19]. P 2 O 5 is a well-known network former composed of PO 4 structural units, in which one of the four oxygen atoms in the PO 4 tetrahedron is doubly bonded to the phosphorous atom [15].…”

Section: Discussionmentioning

confidence: 99%

“…ey have significant physical properties, such as a low melting temperature, high heat transfer coefficient, high ultraviolet transmission, lower glass transition temperature, minimum softening temperature, high ionic conductivity, and biocompatibility [8]. Addition of Al 2 O 3 to phosphate glasses improves their chemical durability and modifies their physical properties for more commercial applications [9,10].…”

Section: Introductionmentioning

confidence: 99%

[Retracted] Effect of Manganese Ions on Spectroscopic and Insulating Properties of Aluminophosphate Glasses

Kassa

Tesfaye

Bulcha

et al. 2021

Advances in Materials Science and Engineering

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The melt-quenching technique was used to produce 39CdO–10Al2O3-(51-x) P2O5: xMnO glasses (x = 0, 0.1, 0.2, 0.3, and 0.4 wt.%). Various stability factors were calculated and presented from DTA analysis. The stability of the glass network appears to increase with the increase of MnO concentration, according to the findings. IR spectral analysis of these glasses exhibited several symmetrical and asymmetrical bands due to phosphate groups. The observed change in these band intensities with the rise in MnO concentrations, ranging from 0.1 wt.% to 0.4 wt.%, shows an increase in the stability of the glass network. Optical absorption analyses of these glasses revealed an absorption band that shifted from 500 to 488 nm as the concentration of manganese oxide (MnO) increased from 0.1 wt.% to 0.4 wt.%, indicating that Mn2+ ions were gradually converted into Mn3+ ions. EPR spectra of these glasses were characterized by two signals due to Mn2+ and Mn3+ ions. Observations on these signal intensity variations revealed an increase in stability of the glass network with the increase of MnO concentration from 0.1 wt.% to 0.4 wt.%. Parameters, which describe the insulating characteristics, for example, dielectric constant, ε, dielectric loss, tan δ, and AC conductivity σac, were determined in relation to frequency (103 Hz to 105 Hz) and temperature (20°C to 400°C) and presented in the dielectric analysis of these glasses.

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“…FTIR spectra of the glass samples doped with different trivalent lanthanides are shown in figure 2. The medium band observed at 3450 cm −1 is due to the symmetric stretching modes of hydroxyl ions and absorbed water molecules [20]. The relative area representing the vibrational modes increases in the order: Ce 3+ < Sm 3+ < Nd 3+ < Er 3+ < Yb 3+ , implying the bonding of the respective rare earth ions with OH − groups.…”

Section: Ftir Analysismentioning

confidence: 94%

Structural and optical investigations of RE³⁺: Yb, Er, Sm, Nd, Ce-doped multi-functional silica glasses for photonic applications

Yasmin,

Geetha

2024

J. Phys. D: Appl. Phys.

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The influence of various trivalent lanthanides was investigated in the silica phosphate multi-component glass matrix, synthesized by the sol-gel method. The prepared glasses were analyzed to explore the degree of bandwidth amplification for telecommunication systems, and the potentiality of lasing media and smart glass films. Alkaline earth metal ions of Ca2+ were effectuated as a glass modifier, mediating the formation of non-bridging oxygen with the glass formers, and imputing favorable structural attributes to the glasses for versatile applications. The bonding parameter derived from the average nephelauxetic ratio implies covalency around the rare earth ion sites in the Er3+ and Nd3+ doped systems, while the Sm3+ doped glass exhibits ionicity. In the silica-based glass matrix singly doped with Yb3+, the coexistence of Yb3+/ Yb2+ ions was evidenced. Transitions across 4f14 and 4f135d levels of Yb2+, with an experimental lifetime of 45.8 ns would provide prospective pulsed yellow lasers, for non-invasive therapeutics. Er3+ doped glass evinced a large bandwidth of 93.775 nm at 1477 nm and a high quantum efficiency of 97%, favorable for O+E+S-band telecommunication networks. The transition corresponding to 4G_(5/2)→6H_(7/2) of Sm3+ and 2G_(7/2)→4I_(9/2) of Nd3+ is suggestive that the respective doped glasses could be devised into solid-state red and green laser sources. Novel NIR emission at 1476 nm was also evidenced in the Sm3+ and Nd3+ doped systems. Prominent absorption at 280 nm and complete transparency in the visible region observed in the Ce3+ mono-doped system make it ideal for smart glasses as UVB and UVC shielding films.

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FTIR and Raman spectroscopic study of sodium aluminophosphate and sodium aluminum-iron phosphate glasses containing uranium oxides

Cited by 39 publications

References 29 publications

Color stability of blue aluminates obtained from recycling and applied as pigments

Color stability of blue aluminates obtained from recycling and applied as pigments

[Retracted] Effect of Manganese Ions on Spectroscopic and Insulating Properties of Aluminophosphate Glasses

Structural and optical investigations of RE³⁺: Yb, Er, Sm, Nd, Ce-doped multi-functional silica glasses for photonic applications

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FTIR and Raman spectroscopic study of sodium aluminophosphate and sodium aluminum-iron phosphate glasses containing uranium oxides

Cited by 39 publications

References 29 publications

Color stability of blue aluminates obtained from recycling and applied as pigments

Color stability of blue aluminates obtained from recycling and applied as pigments

[Retracted] Effect of Manganese Ions on Spectroscopic and Insulating Properties of Aluminophosphate Glasses

Structural and optical investigations of RE3+: Yb, Er, Sm, Nd, Ce-doped multi-functional silica glasses for photonic applications

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Structural and optical investigations of RE³⁺: Yb, Er, Sm, Nd, Ce-doped multi-functional silica glasses for photonic applications