The O permeability of materials of the form, SrCo1-xMxO3-, where x ranged from 0 to 0.5, was studied at temperatures of between 950 and 1370K, under O partial pressures of 0.21 to 1000Pa. The highest O ionic conductivity (deduced from O permeation data) was found for SrCo1-xFexO3- solid solutions with x-values of 0.20 to 0.35 (table 21). The O ion transference number of substituted cobaltites did not exceed 0.05.

V.V.Kharton, E.N.Naumovich, A.V.Nikolaev: Solid State Phenomena, 1994, 39-40, 147-52

 

 

 

Table 21

Ionic Conductivity of SrCo1-x-yFexCuyO3-

 

 

x

 

y

 

0(S/cm)

 

Q(kJ/mol)

 

 

0

 

0

 

0.35

 

-

0.2

0

1.55

95

0.3

0

1.86

76

0.4

0

1.95

61

0.5

0

1.26

80

0

0.2

0.31

95

0

0.3

0.59

76

0.2

0.2

0.88

80

0.3

0.2

0.91

84

0.3

0.3

0.68

91

0.3

0.4

0.22

75

0.4

0.2

0.71

57

0.4

0.3

0.21

51