This O ion conductivity of this compound, which consisted of inter-grown Aurivillius phase, Bi4Ti3O12, and brownmillerite-like layers of BaMO2.5, was measured by using complex impedance methods. It was found that the compound exhibited a discontinuity in the Arrhenius plot. The occurrence of a phase transition at this discontinuity was confirmed, and was consistent with an O vacancy order-disorder transition. The conductivity at 900C was equal to 4.9 x 10-2S/cm.

J.K.Thomas, K.R.Kendall, H.C.Zur Loye: Solid State Ionics, 1994, 70-71, 225-8

 

Table 28

Conductivity Data for Bi2CoxV1-xO5.5-3x/2

 

x

Temperature (C)

E (eV)

(S/cm)

0.07

300

0.67

0.002

0.07

600

0.43

0.141

0.10

300

0.73

0.001

0.10

600

0.47

0.117

0.13

300

0.62

0.0021

0.13

600

0.49

0.0745

0.16

300

0.65

0.0013

0.16

600

0.51

0.0612

0.19

300

0.67

0.00077

0.19

600

0.55

0.0385