A review of the structures of oxide glasses by Raman spectroscopy

Yadav, Anurag; Singh, Prabhakar

doi:10.1039/c5ra13043c

Cited by 629 publications

(252 citation statements)

References 227 publications

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“…Na and Li oxynitride glasses exhibit the same Raman features and attributions with just a slight shift in peak positions due to difference in ionic radius . Table presents the Raman assignments to seven peaks observed in this work for LiPON and NaPON network structures related to phosphorous‐oxygen and phosphorous‐nitrogen bonds in accordance to the literature …”

Section: Resultssupporting

confidence: 76%

LiPON and NaPON glasses: A study of the ammonolysis of lithium and sodium metaphosphate melts

Souza

Gebhardt

et al. 2019

Int J of Appl Glass Sci

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Metaphosphate glasses such as LiPO3 and NaPO3 are known to incorporate nitrogen in the molten state under NH3 flow to form (Li/Na)PON glasses through the reaction: (Li/Na)PO3 + xNH3 → (Li/Na)PO3−(3x/2)Nx + (3x/2)H2O, by partially replacing two‐coordinated oxygen with two‐ and three‐coordinated nitrogen. After nitridation, the glasses exhibit improved properties such as increased working range, chemical durability, and ionic conductivity. In this study, LiPO3 and NaPO3 glasses were prepared by the conventional melting and casting method and used as base glasses for the ammonolysis procedure. The nitridation processes were carried out by remelting the base glasses at temperatures up to 780°C, under a constant NH3 flow. The effects on the nitrogen content in the resulting (Li/Na)PON glasses caused by different processing times and masses of powder and/or bulk materials were investigated. Nitridation was successfully confirmed by CNHS chemical analyses, Raman spectroscopy, and Differential Scanning Calorimetry. Mass loss measurements after the ammonolysis process and Raman spectroscopy were used to quantify the nitrogen content into the glass structure. A new approach using a specific Raman normalization, (P–N<)/(O–P–O)sym, has been demonstrated as a reliable, simple, and fast way to determine the amounts of N incorporated to metaphosphate glass structures.

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Section: Resultssupporting

confidence: 76%

LiPON and NaPON glasses: A study of the ammonolysis of lithium and sodium metaphosphate melts

Souza

Gebhardt

et al. 2019

Int J of Appl Glass Sci

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“…For CPSNB2, CPSNB3 and CPSNB4 sample, average HCA particle sizes are 1355, 1587 and 1605 nm, respectively. This shows that average particle size decreases with increase in CaO content from 15 to 20 mol% and increases with increase in CaO content from 20 to 30 mol% (Yadav and Singh 2015). From these observations it could be concluded that HCAforming ability is more for CPSNB1 compared to CPSNB2 sample and HA-forming ability is in increasing order from CPSNB2 to CPSNB4 sample as observed in XRD analysis.…”

Section: Surface Morphologysupporting

confidence: 63%

“…The obtained NBO/BO ratios for CPSNB1, CPSNB2, CPSNB3 and CPSNB4 samples were 0.36188, 0.22859, 0.26729 and 0.47349, respectively. It indicates that NBO/BO ratio decreased with increase in CaO from 15 to 20 mol% and increased with increase in CaO from 20 to 30 mol% (Yadav and Singh 2015). Wollstonite crystalline phase was also observed in the wave number region 1044-1051 cm -1 (Aguiar et al 2009).…”

Section: Surface Morphologymentioning

confidence: 77%

Effect of alkali earth oxides on hydroxy-carbonated apatite nano layer formation for SiO2–BaO–CaO–Na2O–P2O5 glass system

et al. 2017

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Barium soda lime phosphosilicate [(58SiO 2 -(32 -x)BaO-xCao-6Na 2 O-4P 2 O 5 (where x = 15, 20, 25 and 30 mol%)] samples were synthesised using conventional sol-gel method at 700°C sintering temperature. Thermal, structural properties were studied using thermo gravimetric analysis and differential thermal analysis, X-ray diffraction, scanning electron microscopy, fourier transform infrared and Raman spectroscopy. Using Raman spectra non-bridging oxygen concentrations were estimated. The hydroxy-carbonated apatite (HCA) layer formation on samples was analysed for 7 days using simulated body fluid (SBF) soaked samples. The growth of HCA layers self-assembled on the sample surface was discussed as a function of NBO/BO ratio. Results indicated that the number of Ca 2? ions released into SBF solution in dissolution process and weight loss of SB-treated samples vary with NBO/BO ratio. The changes in NBO/BO ratios were observed to be proportional to HCA forming ability of barium soda lime phosphosilicate glasses.

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“…Furthermore, two bands at 958-972 cm −1 and 1000-1019 cm −1 indicate the presence of Q 0 and Q 1 P entities, respectively [28,44,47].…”

Section: Raman Spectroscopymentioning

confidence: 98%

Structural variations of bioactive glasses obtained by different synthesis routes

Dziadek

Zagrajczuk

Jeleń

et al. 2016

Ceramics International

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A review of the structures of oxide glasses by Raman spectroscopy

Cited by 629 publications

References 227 publications

LiPON and NaPON glasses: A study of the ammonolysis of lithium and sodium metaphosphate melts

LiPON and NaPON glasses: A study of the ammonolysis of lithium and sodium metaphosphate melts

Effect of alkali earth oxides on hydroxy-carbonated apatite nano layer formation for SiO2–BaO–CaO–Na2O–P2O5 glass system

Structural variations of bioactive glasses obtained by different synthesis routes

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