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The topology of amorphous materials is an important topic from the perspective of structural ordering. Compression, one of the sintering processes of solid-state materials, can induce material densification. Here, we have confirmed for the first time that densified amorphous SiO2 fabricated by cold compression of siliceous zeolite is permanently densified while densified glassy SiO2 fabricated by cold compression of glassy SiO2 is not, although the X-ray diffraction data and the density of the former is identical to those of the latter. Moreover, we found that the topology of densified amorphous SiO2 fabricated from siliceous zeolite remains that of crystalline siliceous zeolite, while the relaxation to pristine glassy SiO2 is observed for densified glassy SiO2 after thermal annealing. These results indicate that densified siliceous zeolites retain their crystalline topology, even in the amorphous state, and that it is possible to design new functional amorphous materials by tuning of the topology.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: silicalite, zeolite, structure, densified amorphous, topology

刊行年月日: 2023-12-09

出版者: Springer Science and Business Media LLC

掲載誌:

• Communications Chemistry (ISSN: 23993669) vol. 6 269

研究助成金:

• MEXT | Japan Society for the Promotion of Science 20H05882
• MEXT | Japan Society for the Promotion of Science 20H05878
• MEXT | Japan Society for the Promotion of Science 20H05881
• MEXT | Japan Society for the Promotion of Science 20H05880
• MEXT | Japan Society for the Promotion of Science 20H05878
• MEXT | Japan Society for the Promotion of Science 20H05881
• MEXT | Japan Society for the Promotion of Science 20H05880

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s42004-023-01075-1

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更新時刻: 2024-04-01 12:30:41 +0900

MDRでの公開時刻: 2024-04-01 12:30:41 +0900