Download file (790KB)
Download as zip (771KB)

コレクション

引用

説明:

Synthesizing densified glasses with structure ordering is an important issue for the development of new optical fibers with high refractive index and low dispersion. Herein, we report on our attempt to synthesize densified silica (SiO2) glasses by hot compression at a pressure of 7.7 GPa and temperatures above 1200 °C. We succeeded for the first time in recovering densified SiO2 glasses compressed at 7.7 GPa and 1300 °C. Samples compressed above 1300 °C were crystallized into coesite by heterogeneous nucleation. The height of the first sharp diffraction peak in high-energy X-ray and neutron diffraction data of densified SiO2 glasses increased with increasing temperature, indicating the evolution of intermediate-range ordering. Furthermore, the density increase of hot-compressed SiO2 glasses was estimated by analyzing reduced pair distribution functions. We found that the SiO2 glass compressed at 7.7 GPa and 1300 °C is by far the most densified and structurally ordered (hyperorderd) glass in the world.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Densified glass, Hot compression, Structure, X-ray diffraction, Neutron diffraction

刊行年月日: 2024-07-01

出版者: The Ceramic Society of Japan

掲載誌:

• Journal of the Ceramic Society of Japan (ISSN: 13486535) vol. 132 issue. 7 p. 427-433 24013

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.2109/jcersj2.24013

関連資料:

その他の識別子:

連絡先:

更新時刻: 2024-08-26 16:30:29 +0900

MDRでの公開時刻: 2024-08-26 16:30:29 +0900