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Evolution of the Defect Structure of Zinc‐Oxide as a Consequence of Tribophysical Activation
Author(s) -
Kakazey N. G.,
Klockov L. A.,
Timofeeva I. I.,
Sreckovic T. V.,
Marinkovic B. A.,
Ristic M. M.
Publication year - 1999
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/(sici)1521-4079(199908)34:7<859::aid-crat859>3.0.co;2-4
Subject(s) - crystallite , dislocation , zinc , transmission electron microscopy , materials science , diffraction , crystallography , oxide , powder diffraction , electron diffraction , activation energy , grinding , scattering , condensed matter physics , metallurgy , chemistry , composite material , optics , nanotechnology , physics
Zinc‐oxide powder was tribophysically activated in a high‐energy vibro mill in a continual regime in air for 3, 30 and 300 minutes with the purpose of modifying the powders physico‐chemical properties. By analyzing of data obtained by X‐ray powder diffraction, electron diffraction and transmission electron microscopy, the values of distances between corresponding crystallographic planes, average domain sizes of coherent scattering, i.e. crystallites, width of diffraction lines due to the existence of microstrains, and microstrain values, minimal dislocation densities, dislocation density due to microstrain and real dislocation density, and also average distances between dislocations were determined. The dependence of these values on the activation time was established, which enabled analysis of the evolution of the defect structure of zinc‐oxide powders during tribophysical activation by grinding in the described regime.