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Versatile in situ powder X-ray diffraction cells for solid-gas investigations

Författare:
  • Torben R. Jensen
  • Thomas K. Nielsen
  • Yaroslav Filinchuk
  • Jens-Erik Jorgensen
  • Yngve Cerenius
  • Evan MacA Gray
  • Colin J. Webb
Publiceringsår: 2010
Språk: Engelska
Sidor: 1456-1463
Publikation/Tidskrift/Serie: Journal of Applied Crystallography
Volym: 43
Dokumenttyp: Artikel
Förlag: Wiley-Blackwell Publishing, Inc

Sammanfattning

This paper describes new sample cells and techniques for in situ powder X-ray diffraction specifically designed for gas absorption studies up to ca 300 bar (1 bar = 100 000 Pa) gas pressure. The cells are for multipurpose use, in particular the study of solid-gas reactions in dosing or flow mode, but can also handle samples involved in solid-liquid-gas studies. The sample can be loaded into a single-crystal sapphire (Al2O3) capillary, or a quartz (SiO2) capillary closed at one end. The advantages of a sapphire single-crystal cell with regard to rapid pressure cycling are discussed, and burst pressures are calculated and measured to be similar to 300 bar. An alternative and simpler cell based on a thin-walled silicate or quartz glass capillary, connected to a gas source via a VCR fitting, enables studies up to similar to 100 bar. Advantages of the two cell types are compared and their applications are illustrated by case studies.

Disputation

Nyckelord

  • Physics and Astronomy
  • solid-gas reactions
  • powder X-ray diffraction
  • X-ray diffraction cells
  • hydrogen absorption

Övriga

Published
Yes
  • ISSN: 0021-8898

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