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Effect of Ambient Atmosphere on Defect Generation in MgO during Mechanical Activation
Author(s) -
Spitsyn V. I.,
Steinike U.,
Barsova L. I.,
Hennig H.P.,
Jurik T. K.,
Kretzschmar U.
Publication year - 1986
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170210429
Subject(s) - ion , electron paramagnetic resonance , electron , atmosphere (unit) , materials science , irradiation , lattice (music) , argon , crystallography , chemistry , nuclear magnetic resonance , physics , thermodynamics , organic chemistry , quantum mechanics , nuclear physics , acoustics
Abstract As previous studies have shown (Spitsyn et al.; Henderson, Wertz; Steinike et al. 1981, 1984; Hennig et al.), mechanical activation of MgO in air results in the generation of anion and cation vacancies in the lattice, thus causing heterogeneous lattice distortions. These anion and cation vacancies are identified as F + ‐ and V − ‐centres, respectively, by EPR spectroscopy. F + ‐centres are anion vacancies filled with electrons, V − ‐centres are cation vacancies filled with holes. The electrons and defect electrons filling the vacancies are generated essentially during γ‐irradiation. Since the effect of the ambient atmosphere on the generation of electronic and structural defects upon mechanical activation is known (Bystrikov et al.), the studies of mechanical MgO activation in air were extended to the generation of above defects in an argon atmosphere. The results are compared with those obtained in air.