Investigation of structural and impedance spectroscopic properties of borate glasses with high Li+ concentration

Boora, Mohini; Malik, Somil; Kumar, Vinod; Bala, Manju; Arora, Susheel; Rohilla, Sunil; Kumar, Anand; Dalal, Jasvir

doi:10.1016/j.ssi.2021.115704

Cited by 29 publications

(12 citation statements)

References 60 publications

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“…The lack of an E dc trend indicates that there is no apparent loss in the ionic component of CD conductivity which can be assigned to the different content of the Y-TZP samples. However, the E dc values presented in Figure 8 correspond well to values obtained for, e.g., different lithium borate glasses [ 47 , 48 ].…”

Section: Resultssupporting

confidence: 82%

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The Effect of Y3+ Addition on Morphology, Structure, and Electrical Properties of Yttria-Stabilized Tetragonal Zirconia Dental Materials

et al. 2022

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Zirconia (ZrO2), a widely known material with an extensive range of applications, is especially suitable for dental applications. This kind of dental material is produced in the form of blocks or discs (mostly discs—depending on CAD/CAM machines) by cold isostatic pressing (CIP). Such discs are subsequently milled by CAM/CAD technology into a desirable form. Due to the application of CIP, the resulting discs consist of different yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) powders, additives and pigments. The diverse composition of the discs (e.g., different Y3+ content) governs material properties, such as hardness, toughness and translucence. The aim of this work was to investigate the impact of Y3+ addition on the grains and grain boundaries, on the ZrO2 phases lattice parameter values and on the electrical equivalent circuit parameters of the prepared Y-TZP samples. The disc-shaped samples were prepared by using CAM/CAD technology. It was observed that the grain size and the grain density were increased by Y3+ addition. The sample with the lowest Y3+ content was characterized by the highest portion of the tetragonal phase, whilst the disc with the highest Y3+ addition consisted mainly of the cubic phase. It was also observed that at the higher Y3+ ion concentrations, these ions mainly incorporated the tetragonal phase. Furthermore, conductivity investigations showed that the resistivity of the grains in the samples with the higher Y3+ concentrations was decreased as these ions were mainly trapped in the grain boundary. On the other hand, the Y3+ trapping increased the capacitance of the grain boundary.

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Section: Resultssupporting

confidence: 82%

“…As the conductivity of the Y-TZP samples is governed by the portion of Y 3+ ions, it was decided that the activation energy ( E dc ) for DC conduction be determined. E dc was computed from the slope log σ dc vs. 1/ T by using the following expression [ 47 , 48 ]:

…”

Section: Resultsmentioning

confidence: 99%

The Effect of Y3+ Addition on Morphology, Structure, and Electrical Properties of Yttria-Stabilized Tetragonal Zirconia Dental Materials

et al. 2022

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“…Another promising approach for the treatment of large bone defects could be the combination of S53P4 with autologous/allogenic bone grafts and local or systemic antibiotics. Newly designed bioactive glasses containing high concentrations of lithium ions [ 54 ] or copper-doped glasses [ 55 ] could also be interesting materials to study in this context. Their altered properties compared to S53P4 could lead to more osteoconductive or osteoinductive potential.…”

Section: Discussionmentioning

confidence: 99%

Treatment of Infection-Related Non-Unions with Bioactive Glass—A Promising Approach or Just Another Method of Dead Space Management?

et al. 2022

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The treatment of infected and non-infected non-unions remains a major challenge in trauma surgery. Due to the limited availability of autologous bone grafts and the need for local anti-infective treatment, bone substitutes have been the focus of tissue engineering for years. In this context, bioactive glasses are promising, especially regarding their anti-infective potential, which could reduce the need for local and systemic treatment with conventional antibiotics. The aim of this study was to investigate the osteoinductive and osteoconductive effects, as well as the anti-infectious potential, of S53P4 using a standardized non-union model, which had not been investigated previously. Using an already established sequential animal model in infected and non-infected rat femora, we were able to investigate bioactive glass S53P4 under realistic non-union conditions regarding its osteoinductive, osteoconductive and anti-infective potential with the use of µCT scans, biomechanical testing and histological, as well as microbiological, analysis. Although S53P4 did not lead to a stable union in the non-infected or the infected setting, µCT analysis revealed an osteoinductive effect of S53P4 under non-infected conditions, which was diminished under infected conditions. The osteoconductive effect of S53P4 remained almost negligible in histological analysis, even 8 weeks after treatment. Additionally, the expected anti-infective effect could not be demonstrated. Our data suggested that S53P4 should not be used in infected non-unions, especially in those with large bone defects.

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“…Jayasankar and Babu [38] revealed that the radiative lifetimes for the excited states of Pr 3+ ions are reduced with decreasing lithium oxide concentration, while their values increase with increasing LiF content. The local structure and some properties of borate glasses are also changed with Li 2 O [39] and Na 2 O [40], respectively.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Properties of Inorganic Glasses Doped with Pr3+: A Comparative Study

2022

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The results presented in this communication concern visible and near-IR emission of Pr3+ ions in selected inorganic glasses, i.e., borate-based glass with Ga2O3 and BaO, lead-phosphate glass with Ga2O3, gallo-germanate glass modified by BaO/BaF2, and multicomponent fluoride glass based on InF3. Glasses present several emission bands at blue, reddish orange, and near-infrared spectral ranges, which correspond to 4f–4f electronic transitions of Pr3+. The profiles of emission bands and their relative intensity ratios depend strongly on glass-host. Visible emission of Pr3+ ions is tuned from red/orange for borate-based glass to nearly white light for multicomponent fluoride glass based on InF3. The positions and spectral linewidths for near-infrared luminescence bands at the optical telecommunication window corresponding to the 1G4 → 3H5, 1D2 → 1G4, and 3H4 → 3F3,3F4 transitions of Pr3+ are dependent on glass-host matrices and excitation wavelengths. Low-phonon fluoride glasses based on InF3 and gallo-germanate glasses with BaO/BaF2 are excellent candidates for broadband near-infrared optical amplifiers. Spectroscopic properties of Pr3+-doped glasses are compared and discussed in relation to potential optical applications.

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Investigation of structural and impedance spectroscopic properties of borate glasses with high Li+ concentration

Cited by 29 publications

References 60 publications

The Effect of Y3+ Addition on Morphology, Structure, and Electrical Properties of Yttria-Stabilized Tetragonal Zirconia Dental Materials

The Effect of Y3+ Addition on Morphology, Structure, and Electrical Properties of Yttria-Stabilized Tetragonal Zirconia Dental Materials

Treatment of Infection-Related Non-Unions with Bioactive Glass—A Promising Approach or Just Another Method of Dead Space Management?

Spectroscopic Properties of Inorganic Glasses Doped with Pr3+: A Comparative Study

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