Structural studies of potassium silicate glasses with fixed iron content and their relation to similar alkali silicates

Nayak, Manjunath T.; Desa, J.A.E.; Reddy, V. R.; Nayak, Chandrani; Bhattacharyya, D.; Jha, S. N.

doi:10.1016/j.jnoncrysol.2019.04.025

Cited by 18 publications

(2 citation statements)

References 21 publications

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“…Bandgap energies for direct and indirect transitions, according to Tauc's theory [31][32][33][34][35][36] are evaluated by:h ¼ C ðh À E opt Þ s : Figs. 6 and 7 present the correlation between ( h ) 1/2 , (h ) 2 , and (h ).…”

Section: Optical Studiesmentioning

confidence: 99%

A Study of Thermal, and Optical Properties of 22SiO2- 23Bi2O3-37B2O3-13TiO2-(5-x) LiF- x BaO Glasses

Ali

Alrowaili

Al-Baradi

et al. 2021

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Using melt-quenching techniques, the glass system 22SiO 2 -23Bi 2 O 3 -37B 2 O 3 -13TiO 2 À ð5 À xÞ LiF-x BaO was prepared. The amorphous status of fabricated samples were established using X-ray diffraction patterns. Differential thermal analysis (glass transition temperature, crystallization temperature, and thermal stability) as well as optical properties (molar refractivity, bandgap, molar polarizability, reflection loss, metallization, electronegativity, and electron polarizability) of these glasses have been investigated. These structural changes influence the thermal properties, as we discovered. Indeed, as BaO levels rise, all the thermal parameters rise as well. With increasing BaO content, density, and refractive index rise. Bandgap energies for direct and indirect transitions reduced as the BaO content increased while Urbach energy increases. This interpretation attributable to the increment in the bond length of Ba-O. This study suggests that the fabricated glasses' optical and thermal characteristics have improved, making them suitable for a variety of applications.

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Section: Optical Studiesmentioning

confidence: 99%

A Study of Thermal, and Optical Properties of 22SiO2- 23Bi2O3-37B2O3-13TiO2-(5-x) LiF- x BaO Glasses

Ali

Alrowaili

Al-Baradi

et al. 2021

Silicon

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“…Recently, studies have been conducted on using silica gels as inorganic anti-fire materials. [11][12][13][14] The existing patents utilize the drying method to prepare the plate-type laminated anti-fire glass using low modulus (less than 3.6) K 2 O⋅nSiO 2 (where n is the SiO 2 /K 2 O modulus), [15][16][17][18][19] but this method cannot be used to prepare curved laminated anti-fire glass. Moreover, in most parts of the world, the ambient temperature in winter drops below −15 • C, and in some regions, it even reaches below −40 • C. These materials, such as polyacrylamide-based and low-modulus K 2 O⋅nSiO 2 -based, freeze or devitrify at low outdoor temperatures (≤−15 • C).…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance of laminated anti‐fire glass using the K₂O·nSiO₂‐based ultrathin and flexible membrane

Mu,

Meng,

Xin

et al. 2023

J Am Ceram Soc.

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We present a new method for synthesizing cold‐resistant laminated anti‐fire glass using a K2O·nSiO2‐based ultrathin flexible membrane, which is prepared by vacuum surface treatment method with ball‐milled core–shell SiO2 emulsion (55 wt%). We systemically characterize the mechanical, optical, rheological, cold‐resistant, fire‐resistant, and weather‐resistant performances of this glass. The formation mechanism of K2O·nSiO2‐based ultrathin membrane is studied in detail using multispeckle diffusing–wave spectroscopy and scanning electron microscopy. Then, the tensile strength, plasticity, and rheological behavior of the materials with different moduli are characterized. Combined with thermal gravity analysis, we characterize the compositions of K2O·nSiO2‐based materials with different moduli. For the K2O·nSiO2‐based ultrathin flexible membrane, the appearance of air‐conducting microchannels is designed, resembling the Wu Zhu coin morphology (a square hole circular coin in ancient China) or honeycomb wall morphology. These structures endow the visible region of the anti‐fire glass with a reduced presence of microbubbles. As a type of building safety glass, the spongelike microporous insulation layer can increase the heat‐insulating time in the event of a fire. Furthermore, the weather‐resistant performance of this glass is demonstrated to be more than 3000 h through an ultraviolet test. This work also provides a new routine for synthesizing high‐quality anti‐fire glass with different shapes, including curved surfaces.

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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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Structural studies of potassium silicate glasses with fixed iron content and their relation to similar alkali silicates

Cited by 18 publications

References 21 publications

A Study of Thermal, and Optical Properties of 22SiO2- 23Bi2O3-37B2O3-13TiO2-(5-x) LiF- x BaO Glasses

A Study of Thermal, and Optical Properties of 22SiO2- 23Bi2O3-37B2O3-13TiO2-(5-x) LiF- x BaO Glasses

Preparation and performance of laminated anti‐fire glass using the K₂O·nSiO₂‐based ultrathin and flexible membrane

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

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Structural studies of potassium silicate glasses with fixed iron content and their relation to similar alkali silicates

Cited by 18 publications

References 21 publications

A Study of Thermal, and Optical Properties of 22SiO2- 23Bi2O3-37B2O3-13TiO2-(5-x) LiF- x BaO Glasses

A Study of Thermal, and Optical Properties of 22SiO2- 23Bi2O3-37B2O3-13TiO2-(5-x) LiF- x BaO Glasses

Preparation and performance of laminated anti‐fire glass using the K2O·nSiO2‐based ultrathin and flexible membrane

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

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Preparation and performance of laminated anti‐fire glass using the K₂O·nSiO₂‐based ultrathin and flexible membrane