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Transmission Mössbauer spectroscopy study of the surface of iron powders: feasibility and results

✍ Scribed by Mikhailik, O. M.; Yelsukov, E. P.; Konygin, G. N.; Mikhailova, S. S.; Povstugar, V. I.

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 92 KB
Volume: 26
Category: Article
ISSN: 0142-2421
DOI: 10.1002/(sici)1096-9918(199811)26:12<885::aid-sia430>3.0.co;2-8

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✦ Synopsis

Transmission Mo ssbauer spectroscopy has been used to obtain information on structural and chemical conversions in the surface layers during preparation of Ðnely dispersed iron powders by high-temperature reduction of a-FeOOH. The two-stage technique of preparing 56Fe-based particles with an 57Fe surface layer makes it possible to obtain high-quality Mo ssbauer spectra from surface layers 4-5 nm thick on di †erent reduction stages. The investigations performed allowed us to consider the possibility of studying physicochemical processes in ultrathin surface layers by means of transmission Mo ssbauer spectroscopy.

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