High-energy synchrotron X-ray diffraction study of high-temperature levitated liquids

Shinji Kohara, Masaki Takata, Akitoshi Mizuno, Masahito Watanabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

High-energy x-ray diffraction experiments were performed on amorphous silica at the high temperatures at high-energy x-ray diffraction beamline BL04B2 of SPring-8. The conical nozzle levitation system was integrated with a two-axis diffractometer for glass, liquid, and amorphous materials. The incident photon energy was 113.3 keV, and diffraction patterns were measured in a transmission geometry at 1330°C The magnitude of the first sharp diffraction peak (FSDP, Q ∼ 1.525 Å) in the total structure factor, S(Q), of amorphous silica significantly decreased at 1330°C, which has not been observed at temperatures lower than the glass transition temperature (T g=1180°C) in previous studies. Total correlation function, T(r), suggested that the 2nd Si-O correlation is disordered due to the increased thermal-vibrations of Si-O tetrahedra. The structural model obtained by reverse Monte Calro modelling suggested that the ring statistics is unchanged at high temperature, whereas SiO4 tetrahedra are distorted.

Original languageEnglish
Title of host publicationMolten Salts XIV - Proceedings of the International Symposium
Pages246-252
Number of pages7
Publication statusPublished - 2006 Dec 1
Externally publishedYes
Event206th ECS Meeting - Honolulu, HI, United States
Duration: 2004 Oct 32004 Oct 8

Publication series

NameProceedings - Electrochemical Society
VolumePV 2004-24

Other

Other206th ECS Meeting
CountryUnited States
CityHonolulu, HI
Period04/10/304/10/8

ASJC Scopus subject areas

  • Engineering(all)

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