The conductivities of Li+ conducting glasses, which had macromolecular networks that were made up of PO4 tetrahedra and TeO4 bi-pyramids, were measured. Glass pellets, with the composition, 0.4Li2O-0.6[xP2O5-(1-x)Te2O4], were obtained by quenching melts into a brass mould at room temperature. It was found that the glass-forming domain was limited to x-values of between 0.4 and 0.8, and that the glass transition temperatures were between 240 and 320C. The ionic conductivities, below the glass transition, obeyed Arrhenius relationships with an almost constant pre-exponential factor given by log[A(SK/cm)] = 4.3 (table 8). At a given temperature, the conductivity increased with the value of x, and a peak was found at an x-value of 0.6.

G.D.L.K.Jayasinghe, P.W.S.K.Bandaranayake, M.A.K.L.Dissanayake, R.P.Gunawardane: Solid State Ionics, 1995, 78[3-4], 199-202

 

 

 

Table 8

Conductivity Parameters for

0.4Li2O-0.6[xP2O5-(1-x)Te2O4] Glasses

 

 

x

 

E (eV)

 

log[o(SK/cm)]

 

 

0.4

 

0.69

 

4.8

0.5

0.67

4.8

0.6

0.55

3.7

0.7

0.62

4.3

0.75

0.61

4.4

0.8

0.55

4.5