Isotopic exchange of gaseous oxygen with mechanoactivated manganese oxides

Abstract

Isotope exchange of oxygen 18O 2 with oxides Mn 2O 3 and Mn 3O 4 was investigated in the temperature range of 300-700° C. It was established that the content of the isotope O 18 in mechanically activated powders was noticeably higher than in the initial ones. Already at relatively low annealing temperatures isotope exchange leads to nearly the maximum possible under the given conditions replacement of atoms 16O to 18O. The isotope exchange parameters connected with the processes at the boundaries of the particles of mechanoactivated powder and within their volume were determined. © (2012) Trans Tech Publications.