It was found that ceramic-glass composites could be produced by the direct sintering of raw mixtures with a high SiO2 content. The conductivity decreased upon increasing the SiO2 content (table 76). When the K content was lower than 15mol%, the activation energy for conduction decreased with the K content. This was attributed to a decreased K jump distance.

S.Nakayama, Y.Sadaoka: Electrochimica Acta, 1995, 40[15], 2541-6

 

 

 

Table 76

Ionic Conductivity of K2O-La2O3-SiO2 Compositions

 

Material

Temperature (C)

Conductivity (S/cm)

E (kJ/mol)

K2O-La2O3-2SiO2

500

1.18 x 10-2

48.1

K2O-La2O3-6SiO2

500

7.74 x 10-6

82.6

K2O-La2O3-6SiO2

600

2.82 x 10-5

82.6