Various transport properties were measured in monocrystals of pure Co1-xO, where x was between 0.003 and 0.044. The 60Co diffusion coefficient was determined at 1200C, for partial pressures of between 0.21 and 32atm and temperatures of between 1064 and 1200C; under a partial pressure of 3.7atm. All of the results exhibited a greater O partial pressure dependence (table 54) than that which was expected on the basis of a point defect theory which assumed the existence of ideal solutions.
K.P.Constant, T.O.Mason, S.J.Rothman, J.L.Routbort: Journal of the Physics and Chemistry of Solids, 1992, 53[3], 405-11
Table 53
Diffusion of 60Co in (Co1-xFex)O
x | Temperature (C) | PO2 (atm) | D (cm2/s) |
0 | 1001 | 2.09 x 10-3 | 2.68 x 10-10 |
0.0055 | 1001 | 2.09 x 10-3 | 7.18 x 10-10 |
0.0090 | 1001 | 2.09 x 10-3 | 9.55 x 10-10 |
0.0148 | 1001 | 2.09 x 10-3 | 1.53 x 10-9 |
0 | 1201 | 2.1 x 10-1 | 9.78 x 10-9 |
0.0055 | 1201 | 2.1 x 10-1 | 1.35 x 10-8 |
0.0090 | 1201 | 2.1 x 10-1 | 1.50 x 10-8 |
0.0148 | 1201 | 2.1 x 10-1 | 1.94 x 10-8 |
0 | 1200 | 2.11 x 10-3 | 2.42 x 10-9 |
0.0055 | 1200 | 2.11 x 10-3 | 4.63x 10-9 |
0.0090 | 1200 | 2.11 x 10-3 | 5.85 x 10-9 |
0.0148 | 1200 | 2.11 x 10-3 | 8.59 x 10-9 |
0 | 1201 | 1.25 x 10-7 | 3.15 x 10-10 |
0.0055 | 1201 | 1.25 x 10-7 | 1.26 x 10-9 |
0.0090 | 1201 | 1.25 x 10-7 | 1.64 x 10-9 |
0.0148 | 1201 | 1.25 x 10-7 | 2.68 x 10-9 |
0 | 1400 | 2.11 x 10-3 | 1.27 x 10-8 |
0.0055 | 1400 | 2.11 x 10-3 | 2.03 x 10-8 |
0.0090 | 1400 | 2.11 x 10-3 | 2.35 x 10-8 |
0.0148 | 1400 | 2.11 x 10-3 | 3.19 x 10-8 |
0 | 1401 | 1.21 x 10-6 | 2.59 x 10-9 |
0.0055 | 1401 | 1.21 x 10-6 | 5.61 x 10-9 |
0.0090 | 1401 | 1.21 x 10-6 | 7.15 x 10-9 |
0.0148 | 1401 | 1.21 x 10-6 | 1.04 x 10-8 |