The effect of silica additive on the structural and luminescence properties of Eu3+/Tb3+ co-doped metaphosphate glasses

Said, Hajer; Omrani, Refka Oueslati; Arana, Laura Ruiz; Bahri, Dhouha; Bouzidi, C.; Terraschke, Huayna; Hamzaoui, Ahmed Hichem; M’nif, Adel

doi:10.1016/j.molstruc.2019.04.087

Cited by 29 publications

(2 citation statements)

References 33 publications

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“…Compared with the area e and f, two peaks at 881 and 744 cm −1 were extremely different. Combining with the element analysis in SEM in Table 5, P─O─Si characteristic absorption (1070–855 cm −1 ) was found at 881 cm −1 and the peak at 771 cm −1 was attributed to P─C (795–650 cm −1 ) groups 31,32 …”

Section: Resultsmentioning

confidence: 74%

Effect of hybrid cross‐linked polyphosphazene microspheres on ablative and mechanical properties of ethylene propylene diene monomer

Chen

He²,

Liu

et al. 2021

J of Applied Polymer Sci

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Polymeric ablative materials (PAMs) are widely used in spacecraft currently for thermal insulation. However, it is challenging to find a single filler that can improve both ablative and mechanical properties of PAMs. In this study, a new type of hybrid cross‐linked polyphosphazene microspheres (PHC) is added to ethylene propylene diene monomer (EPDM) composites as a filler for the first time and its influence on the ablation, mechanical, and thermal properties of EPDM is investigated. The results show that the addition of 3 phr PHC increases the ablation performance by about 10% and enhances the mechanical properties by 20% approximately. In addition, the ablation mechanism is studied in accordance with SEM, FTIR, and Raman spectroscopy. On the one hand, PHC has the effect of catalyzing carbonization, thus increasing the rate of residual carbon; on the other hand, PHC changes the morphology of the char layer, forming a cross‐linked structure containing P─O─Si bonds on the surface. The findings regarding catalyzing carbonization and the special char layer structure could guide the design of ablative materials.

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Section: Resultsmentioning

confidence: 74%

Effect of hybrid cross‐linked polyphosphazene microspheres on ablative and mechanical properties of ethylene propylene diene monomer

Chen

He²,

Liu

et al. 2021

J of Applied Polymer Sci

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show abstract

“…The weak shoulder observed at 790 cm −1 is attributed to the symmetric stretching of Si-O-Si [29]. The medium peak at 455 cm −1 could be ascribed to the bending modes of O-P-O and Si-O-Si bonds [34,35]. The peak is also indicative of the presence of Ca 2+ ions in the glass matrix [36].…”

Section: Ftir Analysismentioning

confidence: 99%

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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Scope and future prospects of pyrophosphate-based phosphors

Kohale

Pawade²,

Dhoble

et al. 2021

Optical Properties of Phosphate and Pyrophosphate Compounds

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The effect of silica additive on the structural and luminescence properties of Eu3+/Tb3+ co-doped metaphosphate glasses

Cited by 29 publications

References 33 publications

Effect of hybrid cross‐linked polyphosphazene microspheres on ablative and mechanical properties of ethylene propylene diene monomer

Effect of hybrid cross‐linked polyphosphazene microspheres on ablative and mechanical properties of ethylene propylene diene monomer

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

Scope and future prospects of pyrophosphate-based phosphors

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The effect of silica additive on the structural and luminescence properties of Eu3+/Tb3+ co-doped metaphosphate glasses

Cited by 29 publications

References 33 publications

Effect of hybrid cross‐linked polyphosphazene microspheres on ablative and mechanical properties of ethylene propylene diene monomer

Effect of hybrid cross‐linked polyphosphazene microspheres on ablative and mechanical properties of ethylene propylene diene monomer

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

Scope and future prospects of pyrophosphate-based phosphors

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Product

Resources

About

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