Structures of silicate glasses with varying sodium and fixed iron contents

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

doi:10.1016/j.jnoncrysol.2019.01.009

Cited by 15 publications

(6 citation statements)

References 25 publications

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“…According to the EDS results, the commercial-grade glass was mainly composed of Si, because glass is primarily made of silica or silicon oxide, and a small amount of Na because sodium carbonate is used in its preparation. 41 The main elements of TiO 2 were detected at a high atomic percentage in the GL/WT140 material, indicating the successful formation of white TiO 2 on the glass substrate. After HF etching, the removal of the glass template resulted in a significant decrease in the atomic percentage of Si in HL/WT140.…”

Section: ■ Results and Discussionmentioning

confidence: 92%

“…The composition of each element is summarized in Table S2. According to the EDS results, the commercial-grade glass was mainly composed of Si, because glass is primarily made of silica or silicon oxide, and a small amount of Na because sodium carbonate is used in its preparation . The main elements of TiO 2 were detected at a high atomic percentage in the GL/WT140 material, indicating the successful formation of white TiO 2 on the glass substrate.…”

Section: Resultsmentioning

confidence: 99%

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Designing Novel LiDAR-Detectable Plate-Type Materials: Synthesis, Chemistry, and Practical Application for Autonomous Working Environment

Jekal,

Otgonbayar,

Noh

et al. 2024

ACS Appl. Mater. Interfaces

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Plate-type hollow black TiO 2 (HL/BT) with a high NIR reflectance was fabricated for the first time as a LiDARdetectable black material. A TiO 2 layer was formed on commercialgrade glass by using the sol−gel method to obtain a plate-type structure. The glass template was then etched with hydrofluoric acid to form a hollow structure, and blackness was further achieved through NaBH 4 reduction, which altered the oxidation state of TiO 2 to black Ti x O 2x−1 or Ti 4+ to Ti 3+ and Ti 2+ . The blackness of the HL/BT material was maintained by a novel approach that involved etching prior to reduction. The thickness of the TiO 2 layer was controlled to maximize the NIR reflectance when applied as paint. The HL/BT material with a thickness of 140 nm (HL/ BT140) showed a blackness (L*) of 13.3 and high NIR reflectance of 23.6% at a wavelength of 905 nm. This is attributed to the effective light reflection at the interface created by the TiO 2 layer and the hollow structure. Plate-type HL/BT140 provides excellent spreadability, durability, and thermal stability in practical paint applications compared with sphere-type materials due to the higher contacting area to the applied surface, making it suitable for use as a LiDAR-detectable inorganic black pigment in autonomous environments.

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Section: ■ Results and Discussionmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Designing Novel LiDAR-Detectable Plate-Type Materials: Synthesis, Chemistry, and Practical Application for Autonomous Working Environment

Jekal,

Otgonbayar,

Noh

et al. 2024

ACS Appl. Mater. Interfaces

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“…The apparent activation energy (Ea) was determined to be 132.03 kJ/mol using Equation (18). This suggested that the rheological process of the K 2 O⋅nSiO 2 material was a thermal acceleration process.…”

Section: Rheological Behavior Of K 2 O⋅nsio 2 -Based Materialsmentioning

confidence: 99%

“…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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“…In traditional models of iron silicate glasses, Fe 2+ is assumed to occupy 6-fold coordinated sites (Mysen and Richet, 2005). However, a wide distribution of 4-, 5-, and 6-fold coordination with oxygen has been reported in synthetic and natural iron silicate glasses by using x-ray, Mössbauer and optical absorption spectroscopies (Calas and Petiau 1983;Virgo and Mysen 1985;Binsted et al 1986;Iwamoto et al 1987;Dingwell and Virgo 1988;Hannoyer et al 1992;Keppler 1992;Wang et al 1993;Rossano et al 1999;Wu et al 1999;Rossano et al 1999Rossano et al , 2000aGaloisy et al 2001;Giuli et al, 2002;Farges et al 2004;Wilke et al 2004;Jackson et al 2005;Mysen 2006;Bingham et al 2007;Giuli et al 2011;Giuli et al 2012;Nyrow et al 2014;Zhang et al 2016;Alderman et al 2017a;Nayak et al 2019) and x-ray and neutron diffraction (Johnson et al 1999;Holland et al 1999;Weigel et al 2006;Wiegel et al 2008a,b;Wright et al 2014).…”

Section: Iron Silicate Melts and Glassesmentioning

confidence: 99%

From Short to Medium Range Order in Glasses and Melts by Diffraction and Raman Spectroscopy

Drewitt

Hennet

2022

Reviews in Mineralogy and Geochemistry

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Figure 2: a) crystalline and b) amorphous structure of SiO2 (small blue spheres: Si atoms, large red spheres: O atoms) shown together with their corresponding x-ray diffraction (Warren 1934a) and Raman (Gross and Ramanova 1929) photographs in c) and d).Figure 4: Raman spectra of SiO2 polymorphs: quartz, cristobalite and glass (redrafted from Neuville et al. (2014)). See the text for the assignment of the BP, R, D1, D2, and other peaks in the glass spectrum.

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Structures of silicate glasses with varying sodium and fixed iron contents

Cited by 15 publications

References 25 publications

Designing Novel LiDAR-Detectable Plate-Type Materials: Synthesis, Chemistry, and Practical Application for Autonomous Working Environment

Designing Novel LiDAR-Detectable Plate-Type Materials: Synthesis, Chemistry, and Practical Application for Autonomous Working Environment

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

From Short to Medium Range Order in Glasses and Melts by Diffraction and Raman Spectroscopy

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Structures of silicate glasses with varying sodium and fixed iron contents

Cited by 15 publications

References 25 publications

Designing Novel LiDAR-Detectable Plate-Type Materials: Synthesis, Chemistry, and Practical Application for Autonomous Working Environment

Designing Novel LiDAR-Detectable Plate-Type Materials: Synthesis, Chemistry, and Practical Application for Autonomous Working Environment

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

From Short to Medium Range Order in Glasses and Melts by Diffraction and Raman Spectroscopy

Contact Info

Product

Resources

About

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