A systematic investigation was made of transport in oxide solid solutions at 1200C. The diffusion of the tracer, 60Co, in (Co,Fe)1-xO was measured at various O activities. The O activity dependences of the tracer diffusion coefficients (tables 43 and 44) were analyzed.
S.Tinkler, R.Subramanian, R.Dieckmann: Journal of the Physics and Chemistry of Solids, 1994, 55[3], 273-86
Table 40
Diffusion of 54Mn in [CoxFe2(1-x)/3Mn(1-x)/3]3-dO4
as a Function of O Activity at 1200C
O Activity | x | D (cm2/s) |
2.09 x 10-1 | 0 | 8.32 x 10-9 |
2.69 x 10-3 | 0 | 4.90 x 10-10 |
2.30 x 10-6 | 0 | 3.72 x 10-10 |
4.00 x 10-7 | 0 | 1.07 x 10-9 |
2.09 x 10-1 | 0.1 | 1.12 x 10-9 |
4.57 x 10-2 | 0.1 | 3.80 x 10-10 |
7.41 x 10-3 | 0.1 | 1.23 x 10-10 |
4.27 x 10-5 | 0.1 | 1.55 x 10-10 |
1.38 x 10-5 | 0.1 | 2.63 x 10-10 |
1.80 x 10-6 | 0.1 | 9.33 x 10-10 |
8.91 x 10-1 | 0.2 | 2.69 x 10-10 |
2.09 x 10-1 | 0.2 | 1.20 x 10-10 |
1.18 x 10-3 | 0.2 | 1.12 x 10-10 |
1.41 x 10-4 | 0.2 | 3.72 x 10-10 |
8.91 x 10-1 | 0.333 | 5.75 x 10-11 |
2.09 x 10-1 | 0.333 | 7.24 x 10-11 |
3.55 x 10-2 | 0.333 | 1.55 x 10-10 |
Table 41
Diffusivity of Fe in (CoxFezMn2z)3-δO4 at 1200C
log10[O2 activity] | x | log10[D (cm2/s)] |
-0.67 | 0 | -9.66 |
-0.67 | 0.1 | -10.13 |
-0.67 | 0.2 | -10.50 |
-0.97 | 0.333 | -10.25 |