Thermogravimetric measurements between 380 and 675 C show that the rate of initial oxidation of MnO follows direct logarithmic, inverse logarithmic, and cubic rate laws successively from the very first stage. The measurements are used to estimate the height of the potential barrier for the electron tunneling from MnO through Mn//2O//3, the electric field strength across the oxide film in the next stage, and the activation energy for the diffusion of oxygen ions in Mn//2O//3. It is concluded that the N. F. Mott-K. Hauffe-B. Ilschner mechanism can be applied to the initial oxidation of manganous oxide.
|Number of pages||5|
|Journal||Trans Jap Inst Met|
|Publication status||Published - 1975 Jan 1|
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