Temperature Gradients for Convection in Well Models

Temperature Gradients for Convection in Well Models

Abstract

DaFe = 34000e- 77'OO/ RT, D-YFe = 0.001 04e-' sooo /RT • The points have been corrected for the change in diffusion distances introduced by cooling the samples to room temperature for measurement. These corrections are between 2 and 3 percent of the value of D. Substituting the measured activation energies, Q, and the interatomic distances, d, for iron into the DushmanLangmiur equation permitted independent calculations of the frequency factor, A. A is given by the...