A systematic investigation was made of transport in oxide solid solutions at 1200C. The diffusion of the tracers, 60Co, 59Fe and 54Mn in (Co,Fe)1-xO was measured at various O activities. The O activity dependence of the electrical conductivity (table 49) was analyzed.

S.Tinkler, R.Subramanian, R.Dieckmann: Journal of the Physics and Chemistry of Solids, 1994, 55[3], 273-86

Table 46

Fe Diffusion in (CoyFe1-y)O as a Function of O Activity

Coefficients in the Equation:

Log[D(cm2/s)] = AaO23 + BaO22 + CaO2 + D

 

y

A

B

C

D

0.97

0.00359

0.0423

0.182

-7.43

0.95

0.00288

0.0290

0.091

-7.41

0.90

0.00524

0.0561

0.132

-7.34

0.80

0.00567

0.0751

0.211

-7.27

0.70

0.00276

0.0237

-0.120

-8.00

0.60

-

-0.0264

-0.436

-8.60