Effect of compositional changes on the structure and properties of alkali-alumino borosilicate glasses

Darwish, H.; Gomaa, Mohamed M.

doi:10.1007/s10854-005-5139-2

Cited by 56 publications

(17 citation statements)

References 21 publications

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“…The primary absorption bands were associated with Si-O-Si bending and stretching modes ($455 cm À1 and $1000 cm À1 ), B-O-B bending and stretching modes associated with BO 3 units ($720 cm À1 and $1370 cm À1 ) and Fe-O bending modes ($550 cm À1 ). These assignments are in good agreement with previous investigations of alkali-borosilicate glasses [35,36,[38][39][40][41][42], and specifically Fe-rich alkali-borosilicates [39]. Additional bands were present in the G78 and MW-25% glass samples at 800 cm À1 and 1275 cm À1 respectively; these were fitted to B-O-B bending and stretching modes in BO 4 units [36][37][38].…”

Section: Ftir Spectroscopysupporting

confidence: 90%

The effects of γ-radiation on model vitreous wasteforms intended for the disposal of intermediate and high level radioactive wastes in the United Kingdom

McGann

Bingham

Hand

et al. 2012

Journal of Nuclear Materials

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Section: Ftir Spectroscopysupporting

confidence: 90%

The effects of γ-radiation on model vitreous wasteforms intended for the disposal of intermediate and high level radioactive wastes in the United Kingdom

McGann

Bingham

Hand

et al. 2012

Journal of Nuclear Materials

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“…[6][7][8] Extensive effort has been made to document the properties of various alumino-borosilicate glass compositions, as well as efforts to explore the structure of alumino-borosilicate glasses. [9][10][11][12][13][14][15] Silica glass is composed of SiO 4 tetrahedra that are connected to create an amorphous network. Introducing alkali and alkaline-earth elements into a pure silica structure, the cations act as modifiers and reduce the connectivity in the tetrahedral network.…”

Section: Introductionmentioning

confidence: 99%

Local structure of network modifier to network former ions in soda‐lime alumino‐borosilicate glasses

Garofalini

2016

J Am Ceram Soc.

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The structure of soda‐lime alumino‐borosilicate glass was studied using molecular dynamics simulations of samples of varying compositions containing ~20 000 atoms each. Pair distribution functions (PDFs) of cations to oxygen were used for comparison to available experimental data to evaluate consistency between simulations and experiment. Additional PDFs and coordination of the network forming cations (Al/B/Si) to network modifiers (Ca/Na) were examined, which is difficult to measure experimentally. The results are consistent with available experimental data regarding cation‐oxygen bond lengths and network former to oxygen coordination numbers. Si and Al are predominantly 4‐coordinated, with a small concentration of overcoordinated species similar to experimental data. B varied as 3‐coordinated, BO3, and 4‐coordinated, BO4, as a function of the amount of Ca2+ and Na+ present, the ratio of Al2O3 to B2O3, and the fictive temperature of the sample, similar to experimental data. The simulations provide new information regarding the locations on the network modifiers to the +3 cations, Al and B. For instance, one Al ion can have multiple Na within 4 Å, but also the Na can be within 4 Å of several +3 cations. Such results would indicate a greater complexity of local structure that goes beyond the stoichiometric one +1 modifier ion near one +3 network former or one +2 modifier near two +3 formers in tetrahedral sites.

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“…The band centered at about 1300 cm −1 is due to the asymmetric stretching relaxation of the B-O bond of trigonal [BO 3 ] units [2,35,36]. The broad band ranging from 850 to 1200 cm −1 arises from the overlapping contributions of silicate and borate groups [37]. Within this range, silicon-oxygen tetrahedral with varying numbers of nonbridge oxygen (NBO), which is commonly denoted as describing Si-O tetrahedral group with bridging oxygen per structural unit, can be assigned to respective IR band [38,39].…”

Section: Resultsmentioning

confidence: 99%

Structural Features and Synthesis of CeO₂-Doped Boroaluminosilicate Oxyfluoride Transparent Glass Ceramics

Wang

Cheng

2015

Journal of Chemistry

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This study investigated the effects of CeO2on structure and synthesis of boroaluminosilicate transparent glass ceramics containing CaF2nanocrystals prepared through isothermal crystallization of the melt-quenched glasses with composition 54SiO2–10B2O3–13Al2O3–14Na2O–3ZnO–2Li2O–4CaF2doped with 0–1.2 mol% CeO2. CeO2in polyvalent states acting as network modifier leads to disruption of the silicate network and the conversion of [BO3] to [BO4] generating the nonlinear variations in crystallization, and thermodynamic and optical features. Glass transition temperature and the crystallization temperature decrease firstly and then increase with the increase of CeO2content. Correspondingly, the size of CaF2nanoscale crystals and the absorption coefficient of the glass ceramics are found to pass through a maximum and then decrease with increasing CeO2addition. Increasing CeO2concentration and elevating treating temperature lead to red-shift of absorption edge and transparency deterioration of glass ceramics.

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Effect of compositional changes on the structure and properties of alkali-alumino borosilicate glasses

Cited by 56 publications

References 21 publications

The effects of γ-radiation on model vitreous wasteforms intended for the disposal of intermediate and high level radioactive wastes in the United Kingdom

The effects of γ-radiation on model vitreous wasteforms intended for the disposal of intermediate and high level radioactive wastes in the United Kingdom

Local structure of network modifier to network former ions in soda‐lime alumino‐borosilicate glasses

Structural Features and Synthesis of CeO₂-Doped Boroaluminosilicate Oxyfluoride Transparent Glass Ceramics

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Effect of compositional changes on the structure and properties of alkali-alumino borosilicate glasses

Cited by 56 publications

References 21 publications

The effects of γ-radiation on model vitreous wasteforms intended for the disposal of intermediate and high level radioactive wastes in the United Kingdom

The effects of γ-radiation on model vitreous wasteforms intended for the disposal of intermediate and high level radioactive wastes in the United Kingdom

Local structure of network modifier to network former ions in soda‐lime alumino‐borosilicate glasses

Structural Features and Synthesis of CeO2-Doped Boroaluminosilicate Oxyfluoride Transparent Glass Ceramics

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Structural Features and Synthesis of CeO₂-Doped Boroaluminosilicate Oxyfluoride Transparent Glass Ceramics