Mechanical Properties of Phosphate Glass Optical Fibers

Mura, Emanuele; Milanese, Daniel; Lousteau, Joris

doi:10.1111/ijag.12040

Cited by 16 publications

(9 citation statements)

References 25 publications

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“…(24) If 3-coordinated (trigonal) B changed to 4-coordinated (tetrahedral) B under the indentation process by absorbing part of the mechanical energy, then such absorption might result in cracks with shorter lengths. To test this hypothesis, the ELNES of boron K-edge in borosilicate glass before and after indentation were analyzed and compared.…”

Section: Elnes Profile Of the Boron K-edgementioning

confidence: 99%

Indentation cracking behaviour and structures of nanophase separation of glasses

Cheng¹,

Song²,

Ercius³

et al. 2017

Phys. Chem. Glasses: Eur. J. Glass Sci. Technol. B

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Section: Elnes Profile Of the Boron K-edgementioning

confidence: 99%

Indentation cracking behaviour and structures of nanophase separation of glasses

Cheng¹,

Song²,

Ercius³

et al. 2017

Phys. Chem. Glasses: Eur. J. Glass Sci. Technol. B

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“…Phosphate glasses have extensive applications in optical communication, , high power laser, − optical switching devices, , and other photonics applications − because of their high compositional flexibility and high solubility of rare-earth ions . Rare earth oxide doped phosphate glasses have high stimulated emission cross sections, moderate phonon energies and low nonlinear coefficients.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Structures in Short- and Middle-Order of Lanthanum-Doped Al₂O₃–NaPO₃ Glasses by Solid State NMR Spectroscopy

Shi

Cui

et al. 2021

J. Phys. Chem. C

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Glasses in the xLa 2 O 3 -yAl 2 O 3 -(100 − x − y)NaPO 3 system were synthesized by a melt quenching method, where 0 ≤ x ≤ 7.5, y = 0 and x = 5, 5 ≤ y ≤ 15. The structures were characterized by advanced multinuclei solid-state nuclear magnetic resonance spectroscopy (SSNMR) and X-ray photoelectron spectroscopy (XPS). 31 P MAS NMR spectroscopy indicates that the glass Q 2 structure is depolymerized by La 2 O 3 and Al 2 O 3 , forming multiple Q xAl n and Q yLa n phosphorus species, where n, x, and y represent the number of P−O−P, P−O−Al, and P−O− La bonds, respectively. The various phosphorus species were identified by the J-coupling effect based one and two-dimensional (1D and 2D) experiments such as 2D J-resolved, 1D refocused INADEQUATE and 1D 31 P{ 27 Al} J-coupling heteronuclear multiple quantum coherence (HMQC). La is used as a mimic to simulate the local structure of the luminescent rare earth ions. 139 La wideband uniform rate smooth truncation quadrupolar Carr−Purcell−Meiboom−Gill (WURST-QCPMG) spectra show that the coordination number of La is dominantly nine, and some La atoms transfer to lower coordination with the addition of Al 2 O 3 . La, Al, and Na atoms exclusively bond to phosphorus tetrahedron PO 4 , which is evidenced by the 31 P/ 23 Na, 31 P/ 27 Al double resonance NMR, XPS, and the calculation of charge balance. However, the Al/P and La/P connection methods are much different based on the calculation of charge balance and bond number. Finally, comprehensive and novel local structure models are developed for these rare earth-doped aluminum phosphate glasses.

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“…The same effect of TiO 2 addition to the increasing of E values and glass durability was found for bioactive phosphate glasses reported in [ 40 , 41 ]. Some reference values of H and E for different phosphate glasses are presented elsewhere [ 9 ].…”

Section: Resultsmentioning

confidence: 99%

“…A more evident decrease is observed when ZnO is replaced by Li 2 O-TiO 2 for a constant TeO 2 content. Some reference values related to the FT parameter for different phosphate glasses are presented elsewhere [ 9 ].…”

Section: Resultsmentioning

confidence: 99%

“…Increased values of hardness, Young’s modulus and fracture toughness of Bi, Pb-doped borophosphate glasses were reported [ 8 ] in comparison with the un-doped phosphate glasses [ 9 ] and rare-earth-doped phosphate glasses [ 10 ], due to the mixed glass former role of P 2 O 5 and B 2 O 3 components, which contribute to structural strengthening. The deformation of phosphate glasses under different load (strain) rates depends on the evolution of four mechanisms, namely, elastic deformation, densification, shear flow and fracture [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Investigations Regarding the Addition of ZnO and Li2O-TiO2 to Phosphate-Tellurite Glasses: Structural, Chemical, and Mechanical Properties

Elisa

Iordache

et al. 2022

Materials

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Phosphate and tellurite glasses can be used in optics, optoelectronics, magneto-optics, and nuclear and medical fields. Two series of phosphate-tellurite glasses, (50-x)ZnO-10Al2O3-40P2O5-xTeO2 and (40-x)Li2O-10Al2O3-5TiO2-45P2O5-xTeO2 (x = 5, 10), were synthesized by a non-conventional wet-route, and the mechanical properties as key performance measures for their application in optoelectronics were investigated. X-ray Diffraction (XRD) measurements revealed the vitreous nature of the investigated materials. Instrumented indentation tests allowed the calculation of hardness (H) and Young’s modulus (E) using the Oliver and Pharr model. The influence of increasing the TeO2 content, as well as the substitution of ZnO by Li2O-TiO2, on the variation of hardness, Young’s modulus, penetration depth (PD), and fracture toughness (FT) was evaluated in both series. As a general trend, there is a decrease in the hardness and Young’s modulus with increasing penetration depth. The addition of Li2O and TiO2 instead of ZnO leads to improved hardness and elastic modulus values. Regarding the H/E ratio, it was found that the samples with lower TeO2 content should be significantly more crack-resistant compared to the higher TeO2 content samples. The H3/E2 ratio, being lower than 0.01, revealed a poor resistance of these glasses to plastic deformation. At the same time, a decrease of the fracture toughness with increasing TeO2 content was noticed for each glass series. Based on dilatometry measurements, the thermal expansion coefficient as well as the characteristic temperatures of the glasses were measured. Field Emission Scanning Electron Microscopy-Energy Dispersive X-ray analysis (FESEM-EDX) revealed a uniform distribution of the elements in the bulk samples. The mechanical properties of these vitreous materials are important in relation to their application as magneto-optical Faraday rotators in laser cavities.

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Mechanical Properties of Phosphate Glass Optical Fibers

Cited by 16 publications

References 25 publications

Indentation cracking behaviour and structures of nanophase separation of glasses

Indentation cracking behaviour and structures of nanophase separation of glasses

Revealing the Structures in Short- and Middle-Order of Lanthanum-Doped Al₂O₃–NaPO₃ Glasses by Solid State NMR Spectroscopy

Investigations Regarding the Addition of ZnO and Li2O-TiO2 to Phosphate-Tellurite Glasses: Structural, Chemical, and Mechanical Properties

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Mechanical Properties of Phosphate Glass Optical Fibers

Cited by 16 publications

References 25 publications

Indentation cracking behaviour and structures of nanophase separation of glasses

Indentation cracking behaviour and structures of nanophase separation of glasses

Revealing the Structures in Short- and Middle-Order of Lanthanum-Doped Al2O3–NaPO3 Glasses by Solid State NMR Spectroscopy

Investigations Regarding the Addition of ZnO and Li2O-TiO2 to Phosphate-Tellurite Glasses: Structural, Chemical, and Mechanical Properties

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Revealing the Structures in Short- and Middle-Order of Lanthanum-Doped Al₂O₃–NaPO₃ Glasses by Solid State NMR Spectroscopy