By using tracer and sectioning techniques, the migration of 60Co was studied at 1000 to 1400C under O partial pressures of between 10-7 and 0.21atm. (table 53).

K.Hoshino, N.L.Peterson: Journal of the Physics and Chemistry of Solids, 1985, 46[2], 229-40

Table 49

Conductivity of (Co,Fe)O as a Function of O Activity

 

Material

Log[aO2]

(S/cm)

(Co0.7Fe0.3)1-xO

-9.34

9.77

(Co0.7Fe0.3)1-xO

-9.19

10.08

(Co0.7Fe0.3)1-xO

-8.80

11.40

(Co0.7Fe0.3)1-xO

-7.99

14.51

continued

Table 49 (continued)

Conductivity of (Co,Fe)O as a Function of O Activity

 

Material

Log[aO2]

(S/cm)

(Co0.7Fe0.3)1-xO

-6.68

16.09

(Co0.7Fe0.3)1-xO

-5.18

13.60

(Co0.7Fe0.3)1-xO

-3.82

10.42

(Co0.7Fe0.3)1-xO

-2.65

11.53

(Co0.7Fe0.3)1-xO

-1.71

16.24

(Co0.7Fe0.3)1-xO

-1.38

18.50

(Co0.8Fe0.2)1-xO

-8.86

2.68

(Co0.8Fe0.2)1-xO

-8.00

3.63

(Co0.8Fe0.2)1-xO

-6.73

4.66

(Co0.8Fe0.2)1-xO

-5.65

4.83

(Co0.8Fe0.2)1-xO

-3.96

4.90

(Co0.8Fe0.2)1-xO

-2.64

5.37

(Co0.8Fe0.2)1-xO

-1.66

8.28

(Co0.8Fe0.2)1-xO

-0.68

14.60

(Co0.8Fe0.2)1-xO

0.0

31.92

(Co0.9Fe0.1)1-xO

-8.87

1.06

(Co0.9Fe0.1)1-xO

-8.01

1.34

(Co0.9Fe0.1)1-xO

-6.65

1.93

(Co0.9Fe0.1)1-xO

-5.26

2.61

(Co0.9Fe0.1)1-xO

-3.82

4.28

(Co0.9Fe0.1)1-xO

-3.32

5.29

(Co0.9Fe0.1)1-xO

-2.68

7.30

(Co0.9Fe0.1)1-xO

-1.68

12.87

(Co0.9Fe0.1)1-xO

-0.68

25.12

(Co0.9Fe0.1)1-xO

0.0

42.11

(Co0.95Fe0.05)1-xO

-8.80

0.40

(Co0.95Fe0.05)1-xO

-8.00

0.52

(Co0.95Fe0.05)1-xO

-6.71

0.82

(Co0.95Fe0.05)1-xO

-5.19

1.30

continued

Table 49 (continued)

Conductivity of (Co,Fe)O as a Function of O Activity

 

Material

Log[aO2]

(S/cm)

(Co0.95Fe0.05)1-xO

-3.84

2.65

(Co0.95Fe0.05)1-xO

-2.62

5.33

(Co0.95Fe0.05)1-xO

-1.66

9.64

(Co0.95Fe0.05)1-xO

-0.68

19.69

(Co0.95Fe0.05)1-xO

0.0

33.28

(Co0.97Fe0.03)1-xO

-8.88

0.40

(Co0.97Fe0.03)1-xO

-7.98

0.42

(Co0.97Fe0.03)1-xO

-6.69

0.62

(Co0.97Fe0.03)1-xO

-5.14

1.20

(Co0.97Fe0.03)1-xO

-3.65

2.91

(Co0.97Fe0.03)1-xO

-2.65

5.11

(Co0.97Fe0.03)1-xO

-1.67

9.34

(Co0.97Fe0.03)1-xO

-0.68

18.46

(Co0.97Fe0.03)1-xO

0.0

30.72

Table 50

Diffusivity of Co in (CoxFe1-x)3-δO4 at 1200C

as a Function of O Activity and Stoichiometry

 

x

log10 [a]

log10 [D (cm2/s)]

0

-3.23

-7.76

0

-4.68

-8.68

0

-6.98

-9.10

0

-7.84

-8.48

0

-8.84

-7.89

0.1

-2.98

-8.21

0.1

-4.00

-8.83

0.1

-6.10

-9.31

0.1

-6.87

-8.87

0.1

-8.10

-8.08

continued

Table 50 (continued)

Diffusivity of Co in (CoxFe1-x)3-δO4 at 1200C

as a Function of O Activity and Stoichiometry

 

x

log10 [a]

log10 [D (cm2/s)]

0.2

-1.20

-8.11

0.2

-1.68

-8.34

0.2

-2.68

-8.88

0.2

-3.55

-9.45

0.2

-5.27

-9.42

0.2

-6.64

-8.55

0.3

-0.68

-9.46

0.3

-1.36

-10.01

0.3

-1.68

-10.03

0.3

-3.34

-9.83

0.3

-4.09

-9.39

0.333

0

-10.12

0.333

-0.68

-10.31

0.333

-2.67

-9.38

0.333

-3.02

-9.17

Table 51

Diffusivity of Fe in (CoxFe1-x)3-δO4 at 1200C

as a Function of O Activity and Stoichiometry

 

x

log10 [a]

log10 [D (cm2/s)]

0

-3.23

-7.68

0

-4.68

-8.59

0

-6.98

-9.30

0

-7.84

-8.69

0

-8.84

-8.15

0.1

-2.98

-8.19

0.1

-4.00

-8.79

0.1

-6.10

-9.52

continued

Table 51 (continued)

Diffusivity of Fe in (CoxFe1-x)3-δO4 at 1200C

as a Function of O Activity and Stoichiometry

 

x

log10 [a]

log10 [D (cm2/s)]

0.1

-6.87

-9.15

0.1

-8.10

-8.39

0.2

-1.20

-8.11

0.2

-1.68

-8.36

0.2

-1.20

-8.11

0.2

-1.68

-8.36

0.2

-2.68

-8.87

0.2

-3.55

-9.45

0.2

-5.27

-9.82

0.2

-6.64

-8.94

0.3

-0.68

-9.52

0.3

-1.36

-10.04

0.3

-1.68

-10.14

0.3

-3.34

-10.37

0.3

-4.09

-9.98

0.333

0

-10.25

0.333

-0.68

-10.67

0.333

-2.67

-10.18

0.333

-3.02

-9.99

Table 52

Diffusivity of Mn in (CoxFe1-x)3-δO4 at 1200C

as a Function of O Activity and Stoichiometry

 

x

log10 [a]

log10 [D (cm2/s)]

0

-3.23

-7.73

0

-4.68

-8.65

0

-6.98

-9.32

0

-7.84

-8.74

continued

Table 52 (continued)

Diffusivity of Mn in (CoxFe1-x)3-δO4 at 1200C

as a Function of O Activity and Stoichiometry

 

x

log10 [a]

log10 [D (cm2/s)]

0

-8.84

-8.18

0.1

-2.98

-8.24

0.1

-4.00

-8.82

0.1

-6.10

-9.34

0.1

-6.87

-8.95

0.1

-8.10

-8.28

0.2

-1.20

-8.09

0.2

-1.68

-8.31

0.2

-2.68

-8.86

0.2

-3.55

-9.42

0.2

-5.27

-9.59

0.2

-6.64

-8.71

0.3

-0.68

-9.43

0.3

-1.36

-9.96

0.3

-1.68

-9.98

0.3

-3.34

-10.02

0.3

-4.09

-9.56

0.333

0

-10.07

0.333

-0.68

-10.39

0.333

-2.67

-9.79

0.333

-3.02

-9.58