Magnetic and spectroscopic studies of an iron lithium calcium silicate glass and ceramic

Nayak, Manjunath T.; Desa, J.A.E.; Babu, P. D.

doi:10.1016/j.jnoncrysol.2017.12.050

Cited by 21 publications

(9 citation statements)

References 23 publications

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“…A minor peak appearing consistently at~465 nm in the samples with iron can be attributed to the ferric ions. [28] In addition, a broad shoulder in all these samples starting from~385 nm has been attributed to the ferric ions. Figure 3 displays the measured and normalised Raman spectra of lithium silicate glass with and without iron in the range 300 to 1,200 cm −1 .…”

Section: Resultsmentioning

confidence: 87%

“…The spectra indicate that the samples are good ultra violet absorbers. A minor peak appearing consistently at ~465 nm in the samples with iron can be attributed to the ferric ions . In addition, a broad shoulder in all these samples starting from ~385 nm has been attributed to the ferric ions.…”

Section: Resultsmentioning

confidence: 99%

“…Even though lithium di-silicate glasses have a high tendency to form phase separated glasses, the addition of iron ions prevents phase separation, as the iron ions participate in network formation in these systems. [28] Though much have been established regarding the behaviour of iron ions in oxide glasses by varying the iron content, not much has been reported on the vitreous system with constant iron concentration nor on iron ions in lithium di-silicate systems.…”

Section: Introductionmentioning

confidence: 99%

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Roles of iron and lithium in silicate glasses by Raman spectroscopy

Nayak

Desa

2018

J Raman Spectroscopy

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Raman spectroscopy has been used in a qualitative analysis of iron containing lithium silicate glasses. The iron was kept fixed at 8 mol% for all the iron containing samples with varying concentrations of Li2O and SiO2, as this resulted in samples that were fully vitreous in nature. The method of deconvolution of peaks in these data has been employed to understand the relative numbers of Q0, Q1, Q2, Q3, and Q4 silicate structural units. Even though the iron concentration is constant, the linkages of silicate structural units show variation with increasing alkali content. The roles of lithium and iron have been found to be opposed to each other in that the presence of lithium discourages formation of tetrahedral linkages in the structure, whereas iron promotes corner connected tetrahedra or the presence of bridging oxygens.

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Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Roles of iron and lithium in silicate glasses by Raman spectroscopy

Nayak

Desa

2018

J Raman Spectroscopy

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“…The introduction of Y2O3 into the glass network enhanced the optical and physical properties of the glass [11]. Glasses containing rare-earth ions have several optical and photonic applications available [12][13][14][15][16][17][18][19]. It is highly possible for UV optics and solid-state batteries applications because of the good ionic conductivity of these glasses [12][13][14][15][16][17][18][19].…”

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confidence: 99%

Optical Properties of SiO2 – TiO2 – La2O3 – Na2O – Y2O3 Glasses and A Novel Process of Preparing the Parent Glass-Ceramics

El‐Rehim

Wahab

Halaka

et al. 2021

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Quaternary glasses with the composition 50SiO2-25TiO2-5La2O3-(20-x) Na2O-xY2O3 where : (0 ≤ ≥ 10) were synthesized using the melt-quench technique. XRD examined the nature of prepared glasses. UV-spectroscopic of investigated glass system studied at room temperature. Both optical bandgap and refractive index of the present glass have been increased. The polarizability and basicity were determined. Thermal parameter values increased as Y2O3 increased. Under controlling heat, the glass-ceramic were prepared and confirmed using XRD. Glass-ceramics are examined using SEM to evaluate a microstructure. Ultrasonic velocities and elastic-moduli of glass-ceramic samples are increased because of the increase in internal energy. The role of Y2O3 modifier in the glass system is clearly demonstrated. Y2O3 also works as an excellent nucleating agent that can induce crystallizations, supporting in the creation of the sub-phase of glass-ceramics.

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“…The formation of TiO 2 crystals induced structural changes in the glass matrix and led to increase in non‐bridging oxygen (NBO). As NBOs are more excited than bridging oxygens (BO), therefore the band gap decreased . As highest crystallization was present in CBBATZ‐3 samples, highest numbers of NBOs are present in this sample.…”

Section: Resultsmentioning

confidence: 95%

Antibacterial and photocatalytic active transparent TiO₂ crystallized CaO–BaO–B₂O₃–Al₂O₃–TiO₂–ZnO glass nanocomposites

et al. 2018

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Transparent TiO2 crystallized 5CaO–10BaO–65B2O3–Al2O3–20TiO2–10ZnO (CBBATZ) glass nanocomposites were fabricated using melt‐quenching technique followed by specific heat treatments. As‐quenched glass samples were provided three different heat treatments at 630°C for 3, 5, and 10 hours in order to obtain different amounts of TiO2 nanocrystals in the glass. The presence of rutile phase of TiO2 nanocrystals in glass was confirmed by X‐ray diffraction. The glass nanocomposite heat treated for 10 hours showed a hydrophobic nature with contact angle of 90.90°. Contact angle decreased from 90.90 to 22.20°, when irradiated under ultraviolet (UV) radiation for 45 minutes. This photoinduced hydrophilicity showed a photocatalytic and self‐cleaning properties of glass nanocomposite. During photocatalytic ink test, the maximum change in color of Resurin (Rz) ink and 60% degradation in absorbance of ink within 150 minutes under UV radiation were found for glass nanocomposite heat treated at 10 hours. Also, 78% degradation in absorbance of methylene blue dye (pollutant) within 180 minutes under UV irradiation was found for glass naocomposite heat‐treated at 10 hours. Antibacterial performance of transparent glass nanocomposite against Escherichia coli was evaluated as well. More than 95% of the bacterial cells were degraded with glass nanocomposite heat‐treated at 10 hours. CBBATZ glass nanocomposite found to impart the antibacterial effect through generation of reactive oxygen species (ROS) in aqueous medium. ROS species which was confirmed in the bacterial cell through intracellular ROS generation kit. During evaluation of mechanical properties using nanoindentation technique, the values of hardness and reduced modulus increased by ~26% and 10%, respectively, for glass nanocomposite heat‐treated at 10 hours as compared to as‐quenched glass.

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Magnetic and spectroscopic studies of an iron lithium calcium silicate glass and ceramic

Cited by 21 publications

References 23 publications

Roles of iron and lithium in silicate glasses by Raman spectroscopy

Roles of iron and lithium in silicate glasses by Raman spectroscopy

Optical Properties of SiO2 – TiO2 – La2O3 – Na2O – Y2O3 Glasses and A Novel Process of Preparing the Parent Glass-Ceramics

Antibacterial and photocatalytic active transparent TiO₂ crystallized CaO–BaO–B₂O₃–Al₂O₃–TiO₂–ZnO glass nanocomposites

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Magnetic and spectroscopic studies of an iron lithium calcium silicate glass and ceramic

Cited by 21 publications

References 23 publications

Roles of iron and lithium in silicate glasses by Raman spectroscopy

Roles of iron and lithium in silicate glasses by Raman spectroscopy

Optical Properties of SiO2 – TiO2 – La2O3 – Na2O – Y2O3 Glasses and A Novel Process of Preparing the Parent Glass-Ceramics

Antibacterial and photocatalytic active transparent TiO2 crystallized CaO–BaO–B2O3–Al2O3–TiO2–ZnO glass nanocomposites

Contact Info

Product

Resources

About

Antibacterial and photocatalytic active transparent TiO₂ crystallized CaO–BaO–B₂O₃–Al₂O₃–TiO₂–ZnO glass nanocomposites