Glass Formation in the MgO–B2O3–SiO2 System

Hordieiev, Yurii; Karasik, Olena; Zaichuk, A. V.

doi:10.1007/s12633-022-01745-0

Cited by 11 publications

(4 citation statements)

References 31 publications

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“…5 presents DTA curves for all the investigated glasses but with a fixed heating rate of 5°C/min. These curves provide valuable information about the characteristic temperatures of the glasses, including T g , T m (melting temperature), T x (onset crystallization temperature), and T с (peak crystallization temperature) [34].…”

Section: Resultsmentioning

confidence: 99%

Exploring the impact of Bi2O3 addition on the thermal properties and crystallization behavior of lead borosilicate glasses

Hordieiev,

Zaichuk

2023

JOR

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Novel heavy-metal oxide glasses with different compositions, specifically (80-x)PbO– xBi2O3–10B2O3–10SiO2, where x ranges from 0 to 60 mol%, were synthesized using a conventional melt-quenching technique. The amorphous nature of these glasses was confirmed through X-ray diffraction analysis. Additionally, infrared spectra were obtained for the prepared samples to explore their structural characteristics. Differential thermal analysis was performed to investigate the characteristic temperatures of the glasses, including the glass transition temperature, melting temperature, onset crystallization temperature, and peak crystallization temperature. The addition of Bi2O3 shifts the characteristic temperatures to higher values and affects the crystallization process and phases formed. Parameters like ΔT, KH, and KSP are used to evaluate and quantify glass stability. Dilatometric measurements demonstrated that substituting PbO with Bi2O3 in the glass composition resulted in an increase in glass transition temperature and dilatometric softening temperature, as well as a decrease in the coefficient of thermal expansion. Furthermore, we determined the density and calculated the molar volume of the samples. These findings deepen our understanding of the thermal behavior, glass stability, and structure-property relationships in lead borosilicate glasses with Bi2O3, facilitating the development and customization of glass compositions with desired thermal and physical characteristics for specific applications.

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Section: Resultsmentioning

confidence: 99%

Exploring the impact of Bi2O3 addition on the thermal properties and crystallization behavior of lead borosilicate glasses

Hordieiev,

Zaichuk

2023

JOR

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“…The following parameters were measured by subjecting the glass sample to a constant heating rate of 5°C/min, from room temperature to 1000°C in an air atmosphere: glass transition temperature (T g ), onset crystallization temperature (T x ), peak crystallization temperature (T c ), and melting temperature (T m ). The determination of the glass transition temperature (T g ) was based on the initiation point of the first endothermic deviation observed in the DTA trace [17]. The process for identifying crystalline phases associated with exothermic peaks in differential thermal analysis (DTA) curves involved heat-treating glass powder in the air at the crystallization temperature for a duration of 5 hours.…”

Section: Methodsmentioning

confidence: 99%

Impact of aluminum fluoride addition on crystallization, structure and thermal properties of lead borate glasses

Hordieiev,

Zaichuk

2024

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The glass composition (70-x)PbO–(30-y)B2O3–(x+y)AlF3, where x and y ranges from 0 to 20 mol%, were prepared using the conventional melt-quenching-annealing technique. The structural and thermal properties of the glasses were comprehensively analyzed using techniques like Differential Thermal Analysis (DTA), Dilatometry, Fourier-Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). XRD confirmed the amorphous, non-crystalline structure of the glasses. The glass network was found to be composed of structural units such as PbO4, BO4, BO3 and AlO6 using FTIR spectroscopy. FTIR analysis revealed significant structural changes, including the transformation of BO4 to BO3 units and the increase in non-bridging bonds, particularly with higher AlF3 content. DTA was instrumental in determining characteristic temperatures, such as the glass transition, melting, and peak crystallization temperatures, along with glass stability parameters (∆T, Hr, Tgr) for all samples. The study found that the addition of AlF3 led to a decrease in these characteristic temperatures when replacing B2O3, but an increase when replacing PbO. Variations in the density and thermal expansion of the lead borate glass were observed upon the addition of AlF3, decreasing when substituting for PbO and increasing when substituting for B2O3. These findings provide insights into the properties of oxyfluoride glasses, paving the way for future optimization in their composition for varied applications.

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“…O{ 23 Na} and 17 O{ 27 Al} NMR applied to an AS glass of composition 10.8Na 2 O−32.3CaO−13.0Al 2 O 3 −44.0SiO 2 . 96 That yielded estimated x(M−BO)/x(M−NBO) ratios of 1.4 and 0.37 for Na + and Ca 2+ , respectively, 96 incidentally very close to those of 1.3 (Na + ) and 0.40 (Ca 2+ ) predicted herein for the M−BO/NBO partitioning of the NaCa2.0−2.1 glass (Table 4).…”

Section: The Journal Of Physical Chemistry B Pubsacsorg/jpcb Articlementioning

confidence: 99%

“…(The CFS scales as the charge divided by the square of the cation radius) . There has been a decades-long and recently growing interest in exploring the structures of Mg 2+ -bearing aluminosilicate (AS) glasses − and their correlation with physical properties. − In contrast, there are comparatively few studies of incorporating Mg 2+ into the other main glass family of ubiquitous technological and geological importance, i.e., borosilicate (BS) glasses. − It also remains unclear as to whether the physical-property boosts observed for Mg 2+ -bearing AS glasses (relative to those with lower-CFS alkali/alkaline earth metal ions) also apply to the BS glass context. Results from M O–Na 2 O–B 2 O 3 –SiO 2 glasses merely suggest that the larger Sr 2+ and Ba 2+ cations offer higher hardness and better elastic properties than their Mg 2+ counterpart …”

Section: Introductionmentioning

confidence: 99%

Sub-Nanometer-Range Structural Effects From Mg²⁺ Incorporation in Na-Based Borosilicate Glasses Revealed by Heteronuclear NMR and MD Simulations

Lv,

Stevensson,

Mathew

et al. 2024

J. Phys. Chem. B

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Magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) experiments and molecular dynamics (MD) simulations were employed to investigate Na 2 O−B 2 O 3 −SiO 2 and MgO− Na 2 O−B 2 O 3 −SiO 2 glass structures up to ≈0.3 nm. This encompassed the {Na [p] }, {Mg [p] }, and {B [3] , B [4] } speciations and the {Si, B [p] , M [p] }−BO and {Si, B [p] , M [p] }−NBO interatomic distances to the bridging oxygen (BO) and nonbridging oxygen (NBO) species, where the superscript indicates the coordination number. The MD simulations revealed the dominance of Mg [5] coordinations, as mirrored in average Mg 2+ coordination numbers in the 5.2−5.5 range, which are slightly lower than those of the larger Na + cation but with a narrower coordination distribution stemming from the higher cation field strength (CFS) of the smaller divalent Mg 2+ ion. We particularly aimed to elucidate such Na + /Mg 2+ CFS effects, which primarily govern the short-range structure but also the borosilicate (BS) glass network order, where both MD simulations and heteronuclear double-resonance 11 B/ 29 Si NMR experiments revealed a reduction of B [4] −O−Si linkages relative to B [3] −O−Si upon Mg 2+ -for-Na + substitution. These effects were quantified and discussed in relation to previous literature on BS glasses, encompassing the implications for simplified structural models and descriptions thereof.

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Glass Formation in the MgO–B2O3–SiO2 System

Cited by 11 publications

References 31 publications

Exploring the impact of Bi2O3 addition on the thermal properties and crystallization behavior of lead borosilicate glasses

Exploring the impact of Bi2O3 addition on the thermal properties and crystallization behavior of lead borosilicate glasses

Impact of aluminum fluoride addition on crystallization, structure and thermal properties of lead borate glasses

Sub-Nanometer-Range Structural Effects From Mg²⁺ Incorporation in Na-Based Borosilicate Glasses Revealed by Heteronuclear NMR and MD Simulations

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Glass Formation in the MgO–B2O3–SiO2 System

Cited by 11 publications

References 31 publications

Exploring the impact of Bi2O3 addition on the thermal properties and crystallization behavior of lead borosilicate glasses

Exploring the impact of Bi2O3 addition on the thermal properties and crystallization behavior of lead borosilicate glasses

Impact of aluminum fluoride addition on crystallization, structure and thermal properties of lead borate glasses

Sub-Nanometer-Range Structural Effects From Mg2+ Incorporation in Na-Based Borosilicate Glasses Revealed by Heteronuclear NMR and MD Simulations

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Sub-Nanometer-Range Structural Effects From Mg²⁺ Incorporation in Na-Based Borosilicate Glasses Revealed by Heteronuclear NMR and MD Simulations