Transport processes in temperature gradients thermal diffusion and soret effect in crystalline solids

Simulations of heat and oxygen diffusion in UO2 nuclear fuel rods

“…(4), the gradient of nonstoichiometry is associated with the conventional Fickian diffusion. The term involving a gradient in temperature represents the Soret effect [43,44], and it is a cross-transport effect: a flux of oxygen appears under a temperature gradient.…”

On the Soret effect in binary nonstoichiometric oxides—kinetic demixing of cuprite in a temperature gradient

“…The immobile sublattice provides a natural frame of reference, and electrochemical cells offer favourable means for measuring local chemical activities. Doing so, a number of mixed-conducting binary compounds have been studied so far [13,[15][16][17][18][19][20][50][51][52][53][54][55][56][57][58][59], but only a few quantitative results for Q* have been evaluated.…”

“…However, the evaluation of heats of transport of individual defects is complicated by the fact that the heat of transport of the neutral metal is the sum of the independent heats of transport ions and electrons. Even neglecting the electronic contribution, the interpretation of the remaining ionic heat of transport is complicated since it is composed of contributions of all mobile defects [19,[55][56][57][58][59].…”

Effect of fluctuating temperature field on the sintering of Al–10Mg alloy

“…Some authors claimed that atoms could transfer owing to temperature gradients, which is called "Soret Effect" [12,13]. And this results from an additive driving force f A , as expressed in:…”

“…In other words, fluctuating sintering might belong to a kind of activated sintering. This would be discussed based on equilibrium binary eutectic phase diagram and "Soret effect" [12,13].…”