Physical, mechanical and structural properties of BaO–CaF2–P2O5 glasses

Narayanan, Manoj Kumar; Shashikala, H.D.

doi:10.1016/j.jnoncrysol.2015.10.006

Cited by 25 publications

(7 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The elastic modulus and hardness of SLS glasses increased as more ES powder was added, which is due to the strengthening of the glass network via network modifier cations (CaO) present in the ES powders. The brittleness of glasses depends on densification, and on plastic deformation flow modes that occur before the crack initiation process [7]. Thereupon, the brittleness of the glass samples increased with increase of CaO content owing to a lesser densification of the samples.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Soda-Lime-Silica Glasses Doped with Eggshell Powder

et al. 2017

View full text Add to dashboard Cite

In this study, eggshell powder obtained from eggshell waste was used as a dopant in soda-lime-silica glass powders. Various eggshell-doped soda-lime-silica glass samples were produced through melting, and the effect of the eggshell powders on the mechanical properties of the soda-lime-silica glasses was investigated by microVickers indentation tests. The X-ray diffraction results of the eggshell-doped glasses showed that, depending on the dopant content, different phases such as gypsum, nepheline, alunogene, aragonite, cristobalite etc. appeared. These results were different from the X-ray diffraction patterns of pure soda-lime-silica glass powders, where the phases observed included sodium aluminium silicate, sodium aluminum oxide, and silicon oxide. Although the elastic modulus of soda-lime-silica glasses increased with the addition of the eggshell powders, the dopant powders also caused an increase in the hardness of the glasses. Furthermore, it was found that the fracture toughness increased for soda-lime-silica glasses with 0.5 and 1 wt% eggshell powder, while it decreased for samples with eggshell powder contents ≥ 1 wt%. This behaviour could be explained by an increased depolymerization in the network connectivity of the glass when the amount of eggshell dopant increases.

show abstract

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Soda-Lime-Silica Glasses Doped with Eggshell Powder

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The selected glass system is desirable for optical applications, e.g., all-optical signal processing and ultrafast switching, given its high metal solubility . Further, the low-melting character, relatively low glass transition temperature, high thermal stability, and adequate mechanical properties make it attractive for photonic devices. , Herein, remarkable reduction of Cu 2+ via graphite during glass preparation by melting is consistently demonstrated whereby the copper dopant is added as copper(II) oxide. Further, in situ concurrent PL and absorption microspectroscopy − is put to use for the real-time monitoring of the optical properties of the copper and Eu 3+ codoped glasses during thermal processing.…”

Section: Introductionmentioning

confidence: 99%

Carbon-Promoted in Situ Evolution of Cu Nanoclusters Influencing Eu³⁺ Photoluminescence in Glass: Bidirectional Energy Transfer

Jiménez

2016

J. Phys. Chem. C

View full text Add to dashboard Cite

The present work explores the use of carbon powder, recently proposed for producing plasmonic metal nanocomposites, as a means to obtain Eu3+ photoluminescence (PL) enhancements via Cu nanoclusters in glass. Phosphate glasses containing Eu2O3 and CuO were prepared by melting in ambient atmosphere with graphite powder added to the batch materials for the chemical reduction of copper(II). Optical absorption and PL spectroscopy characterizations, including emission decay dynamics, were performed. The data show consistently the effective reduction of Cu2+ ions via carbon during melting which ultimately leads to thermally induced copper particle precipitation. Further, the novel in situ concurrent PL and absorption microspectroscopy technique was employed for the real-time monitoring of the optical properties of the codoped glasses during thermal processing from 470 to 490 °C. Bidirectional energy transfer between europium ions and copper nanoclusters has been manifested through enhancement and quenching regimes of Eu3+ PL. These periods were observed well separated in time, favorable for the optical tuning of the solid-state luminescent material. Relating simultaneously the luminescence with the time evolution in optical absorption allowed for discriminating the effects of Cu preplasmonic clusters as energy donors and Cu nanoparticles as acceptors, to and from Eu3+ ions, respectively.

show abstract

“…comparable to the reported for similar glasses. 21,30 They exhibit similarly the broad diffuse scattering at lower angles consistent with long-range structural disorder with no additional crystallization peaks. Accordingly, the noncrystalline nature of the glasses synthesized is supported.…”

Section: ■ Introductionmentioning

confidence: 85%

Tm³⁺Ion Blue Emission Quenching by Pd²⁺Ions in Barium Phosphate Glasses: Fundamental Analysis toward Sensing Applications

Jiménez

Ibarra

2022

J. Phys. Chem. B

View full text Add to dashboard Cite

The quenching effect of Pd2+ ions on the blue emission from Tm3+ was investigated for the first time using barium phosphate glass as model matrix. Glasses containing fixed Tm2O3 at 0.5 mol % and PdO up to 0.3 mol % (added relative to P2O5) were prepared by melting and first characterized for basic structural properties by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and Raman spectroscopy. Thermal properties were then evaluated by differential scanning calorimetry (DSC). The focus was thereafter on evaluating the optical properties by absorption and photoluminescence (PL) spectroscopy with decay kinetics assessment. XRD confirmed the amorphous nature of the glasses synthesized. The vibrational spectroscopy assessment consistently exhibited the IR- and Raman-active bands characteristic of phosphate glasses, showing no significant variation with PdO codoping. The DSC analysis revealed all glasses possessed high thermal stability assessed by the differences (ΔT = T g – T x ≥ 154 °C) between glass transition temperatures (T g) and onset of crystallization (T x). A tendency of the T g values to increase with PdO contents was however exhibited. In addition, specific enthalpies of crystallization showed magnitudes decreasing with increasing PdO concentration, thus suggesting crystallization suppression by Pd2+. Concerning the optical properties, it was observed that codoping the glasses with PdO (0.1–0.3 mol %) led to the development of the visible Pd2+ d–d absorption band (peak ≈415–410 nm). In addition, drastic PL quenching of the Tm3+ blue emission around 452 nm (1D2 → 3F4 transition) was induced by Pd2+. Analyzing PL decay curves obtained by exciting Tm3+ ions at 359 nm while monitoring 452 nm emission revealed decreased 1D2 state lifetimes. Thus, a potential of Tm3+ for analytical sensing of Pd2+ in various matrices was suggested. Ultimately determining quenching constants from the PL data and based on the comparison of results from emission intensity and decay rates, likely Tm3+ → Pd2+ energy transfer processes underlying the PL quenching were proposed.

show abstract

Physical, mechanical and structural properties of BaO–CaF2–P2O5 glasses

Cited by 25 publications

References 36 publications

Mechanical Properties of Soda-Lime-Silica Glasses Doped with Eggshell Powder

Mechanical Properties of Soda-Lime-Silica Glasses Doped with Eggshell Powder

Carbon-Promoted in Situ Evolution of Cu Nanoclusters Influencing Eu³⁺ Photoluminescence in Glass: Bidirectional Energy Transfer

Tm³⁺Ion Blue Emission Quenching by Pd²⁺Ions in Barium Phosphate Glasses: Fundamental Analysis toward Sensing Applications

Contact Info

Product

Resources

About

Physical, mechanical and structural properties of BaO–CaF2–P2O5 glasses

Cited by 25 publications

References 36 publications

Mechanical Properties of Soda-Lime-Silica Glasses Doped with Eggshell Powder

Mechanical Properties of Soda-Lime-Silica Glasses Doped with Eggshell Powder

Carbon-Promoted in Situ Evolution of Cu Nanoclusters Influencing Eu3+ Photoluminescence in Glass: Bidirectional Energy Transfer

Tm3+Ion Blue Emission Quenching by Pd2+Ions in Barium Phosphate Glasses: Fundamental Analysis toward Sensing Applications

Contact Info

Product

Resources

About

Carbon-Promoted in Situ Evolution of Cu Nanoclusters Influencing Eu³⁺ Photoluminescence in Glass: Bidirectional Energy Transfer

Tm³⁺Ion Blue Emission Quenching by Pd²⁺Ions in Barium Phosphate Glasses: Fundamental Analysis toward Sensing Applications