Energy-saving glasses based on sodium tungsten bronze-like (Na5W14O44) functional units: Facile synthesis, NIR-shielding performance, and formation mechanism

G. Yang; C. Yang; F. Xia; D. Hu; J. Brugger; B.E. Etschmann; J. Hamilton; H. Chen; Y. Gao

doi:10.1016/j.ceramint.2022.04.005

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Energy-saving glasses based on sodium tungsten bronze-like (Na5W14O44) functional units: Facile synthesis, NIR-shielding performance, and formation mechanism

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Energy-saving glasses based on sodium tungsten bronze-like (Na5W14O44) functional units: Facile synthesis, NIR-shielding performance, and formation mechanism

G. Yang, C. Yang, F. Xia, D. Hu, J. Brugger, B.E. Etschmann, J. Hamilton, H. Chen and Y. Gao

Ceramics International, Vol.48(15), pp.21141-21150

2022

DOI: https://doi.org/10.1016/j.ceramint.2022.04.005

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Abstract

Near-infrared (NIR)-shielding glasses for energy-saving window applications were prepared by forming sodium tungsten bronze-like (Na5W14O44) functional units in the 29SiO2–43B2O3–28NaF glass matrix. The glasses were synthesized by a facile melt-quenching process where 4–8 mol.% H2WO4 was added as the W source. The optimal glass was produced using 6 mol.% H2WO4, which had a low NIR transmission of 15.4% and a high visible light transmission of 59.8%. The possible mechanism for the formation of Na5W14O44 in glasses were discussed based on XRD, Raman, XPS, XANES and EXAFS characterization of the glass samples, the glass samples after further crystallization, and the samples produced by staged heating of the starting materials. Crystalline or amorphous Na5W14O44 formed during heating partially due to the protection by molten B2O3. Subsequently, amorphous Na5W14O44 clusters are present in the glass acting as NIR-shielding functional units. This study sheds a light on further development of non-film-based and highly efficiency energy-saving windows.

Details

Title: Energy-saving glasses based on sodium tungsten bronze-like (Na5W14O44) functional units: Facile synthesis, NIR-shielding performance, and formation mechanism
Authors/Creators: G. Yang (Author/Creator) - Shanghai University
C. Yang (Author/Creator) - Shanghai University
F. Xia (Author/Creator) - Murdoch University
D. Hu (Author/Creator) - Shanghai University
J. Brugger (Author/Creator) - Monash University
B.E. Etschmann (Author/Creator) - Monash University
J. Hamilton (Author/Creator) - Australian Synchrotron
H. Chen (Author/Creator) - Shanghai University
Y. Gao (Author/Creator) - Shanghai University
Publication Details: Ceramics International, Vol.48(15), pp.21141-21150
Publisher: Elsevier Ltd
Identifiers: 991005544980807891
Copyright: © 2022 Elsevier Ltd and Techna Group S.r.l.
Murdoch Affiliation: Harry Butler Institute
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 2 Chemistry; 2.74 Photocatalysts; 2.74.1306 Electrochromism
Web Of Science research areas: Materials Science, Ceramics
ESI research areas: Materials Science