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説明:

Pressure induced amorphization provides a distinct route to prepare novel amorphous materials. Single crystals of the porous aluminophosphate AlPO4-17 directly transform to an amorphous state beginning at 0.6 GPa, without fragmentation into polycrystalline material. Apart from a reduction in dimensions, the amorphous material retains the form of the initial single crystal. Remnant crystalline domains in the amorphous material also preserve the initial ori-entation of the single crystal. X-ray diffraction indicates the compression of the structure around the empty pores in the xy plane and such an amorphization mechanism is consistent with a direct structural relationship between the single crystal and amorphous forms. The collapse of the initial pore volume is almost complete at 2.5 GPa. A memory effect is observed in the amorphous form, which strongly expands on decompression. The present process opens the way for the synthesis of topologically-ordered amorphous materials approaching “perfect glasses” with improved mechanical properties.

権利情報:

• In Copyright
  

  This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry Letters, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see　https://doi.org/10.1021/acs.jpclett.4c00853.

キーワード: AlPO4‑17, high pressure, memory effect

刊行年月日: 2024-05-02

出版者: American Chemical Society (ACS)

掲載誌:

• The Journal of Physical Chemistry Letters (ISSN: 19487185) p. 4612-4615

研究助成金:

• Elettra-Sincrotrone Trieste

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4489

公開URL: https://doi.org/10.1021/acs.jpclett.4c00853

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更新時刻: 2025-04-20 17:43:48 +0900

MDRでの公開時刻: 2025-04-20 17:42:51 +0900