Time‐resolved pair distribution function analysis of disordered materials on beamlines BL04B2 and BL08W at SPring‐8. (28th September 2018)

• Record Type: Journal Article
• Authors: Ohara, Koji; Tominaka, Satoshi; Yamada, Hiroki; Takahashi, Masakuni; Yamaguchi, Hiroshi; Utsuno, Futoshi; Umeki, Takashi; Yao, Atsushi; Nakada, Kengo; Takemoto, Michitaka; Hiroi, Satoshi; Tsuji, Naruki; Wakihara, Toru
• Is Part Of: Journal of synchrotron radiation. Volume 25:Part 6(2018)
• Page Start: 1627
• Page End: 1633
• Publication Date: 2018-09-28
• Subjects: time‐resolved measurements -- pair distribution functions -- beamlines -- disordered materials -- crystallization; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577518011232
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : A new apparatus for total scattering measurements has been developed with a variable camera length using a 16‐inch two‐dimensional flat‐panel detector to observe structural changes in amorphous and disordered crystalline materials substantially in real time on beamlines BL08W and BL04B2 at SPring‐8. This paper presents the successful time‐resolved pair distribution function analysis at SPring‐8, and a newly developed program for data conversion from two‐dimensional images into one‐dimensional total scattering patterns. Abstract : A dedicated apparatus has been developed for studying structural changes in amorphous and disordered crystalline materials substantially in real time. The apparatus, which can be set up on beamlines BL04B2 and BL08W at SPring‐8, mainly consists of a large two‐dimensional flat‐panel detector and high‐energy X‐rays, enabling total scattering measurements to be carried out for time‐resolved pair distribution function (PDF) analysis in the temperature range from room temperature to 873 K at pressures of up to 20 bar. For successful time‐resolved analysis, a newly developed program was used that can monitor and process two‐dimensional image data simultaneously with the data collection. The use of time‐resolved hardware and software is of great importance for obtaining a detailed understanding of the structural changes in disordered materials, as exemplified by the results of commissioned measurements carried out on both beamlines. Benchmark results obtained using amorphous silica and demonstration results for the observation of sulfide glass crystallization upon annealing are introduced.