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Nature of mechanically induced defects in polycrystalline hydrargillite and Al2O3-A1(OH)3 studied by radiation methods

  • Inorganic Chemistry
  • Published:
Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Abstract

Mechanical treatment of hydrargillite Al(OH)3 in a vibrational grinder and in a ball-mill grinder increases the dispersion, the specific surface area, and the unit-cell constants. An x-ray amorphous phase forms. Differences in the nature and in the concentration of paramagnetic centers arise on γirradiation (77 K) of the mechanically treated samples. Anion vacancies and oxygen ions with disrupted short-range order appear in the mechanically treated samples. Their concentration increases with increased time of mechanical treatment. Pulsed thermal treatment of hydrargillite forms the Al2O3-Al(OH)3 system and anneals the mechanically induced defects.

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Authors and Affiliations

  1. Institute of Physical Chemistry, Academy of Sciences of the USSR, Moscow

    U. Steinike, L. I. Barsova, T. K. Jurik, U. Kretchmar, H. -P. Hennig & U. Bol'mann

  2. Central Institute of Physical Chemistry, GDR Academy of Sciences, Berlin

    U. Steinike, L. I. Barsova, T. K. Jurik, U. Kretchmar, H. -P. Hennig & U. Bol'mann

Authors
  1. U. Steinike
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  2. L. I. Barsova
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  3. T. K. Jurik
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  4. U. Kretchmar
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  5. H. -P. Hennig
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  6. U. Bol'mann
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1463–1467, July, 1990.

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Steinike, U., Barsova, L.I., Jurik, T.K. et al. Nature of mechanically induced defects in polycrystalline hydrargillite and Al2O3-A1(OH)3 studied by radiation methods. Russ Chem Bull 39, 1321–1324 (1990). https://doi.org/10.1007/BF00957829

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  • DOI: https://doi.org/10.1007/BF00957829

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