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Article Dans Une Revue Communications Chemistry Année : 2023

Siliceous zeolite-derived topology of amorphous silica

Hirokazu Masai
Toru Wakihara
  • Fonction : Auteur
Yuki Shibazaki
  • Fonction : Auteur
Yohei Onodera
Atsunobu Masuno
Koji Ohara
Yuki Sakai
Philippe Hébert
  • Fonction : Auteur
Aude Isambert
David Keen
Masaki Azuma

Résumé

Abstract The topology of amorphous materials can be affected by mechanical forces during compression or milling, which can induce material densification. Here, we show that densified amorphous silica (SiO 2 ) fabricated by cold compression of siliceous zeolite (SZ) is permanently densified, unlike densified glassy SiO 2 (GS) fabricated by cold compression although the X-ray diffraction data and density of the former are identical to those of the latter. Moreover, the topology of the densified amorphous SiO 2 fabricated from SZ retains that of crystalline SZ, whereas the densified GS relaxes to pristine GS after thermal annealing. These results indicate that it is possible to design new functional amorphous materials by tuning the topology of the initial zeolitic crystalline phases.

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Chimie
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Dates et versions

hal-04369660 , version 1 (03-01-2024)

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Hirokazu Masai, Shinji Kohara, Toru Wakihara, Yuki Shibazaki, Yohei Onodera, et al.. Siliceous zeolite-derived topology of amorphous silica. Communications Chemistry, 2023, 6 (1), pp.269. ⟨10.1038/s42004-023-01075-1⟩. ⟨hal-04369660⟩
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