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 78). 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 78
Ionic Conductivity of K2O-Sm2O3-SiO2 Compositions
Material | Temperature (C) | Conductivity (S/cm) | E (kJ/mol) |
K2O-Sm2O3-2SiO2 | 500 | 1.71 x 10-2 | 32.8 |
K2O-Sm2O3-2SiO2 | 600 | 2.00 x 10-2 | 32.8 |
K2O-Sm2O3-3SiO2 | 500 | 3.95 x 10-2 | 39.9 |
K2O-Sm2O3-3SiO2 | 600 | 5.07 x 10-2 | 39.9 |
K2O-Sm2O3-4SiO2 | 500 | 3.52 x 10-4 | 50.6 |
K2O-Sm2O3-4SiO2 | 600 | 9.46 x 10-4 | 50.6 |
K2O-Sm2O3-6SiO2 | 500 | 9.28 x 10-6 | 79.7 |
K2O-Sm2O3-6SiO2 | 600 | 3.61 x 10-5 | 79.7 |
K2O-Sm2O3-7SiO2 | 500 | 8.20 x 10-6 | 86.1 |
K2O-Sm2O3-7SiO2 | 600 | 3.17 x 10-5 | 86.1 |
K2O-Sm2O3-8SiO2 | 500 | 3.96 x 10-6 | 87.4 |
K2O-Sm2O3-8SiO2 | 600 | 1.64 x 10-5 | 87.4 |
K2O-Sm2O3-10SiO2 | 500 | 2.80 x 10-6 | 89.5 |
K2O-Sm2O3-10SiO2 | 600 | 1.16 x 10-5 | 89.5 |
K2O-Sm2O3-12SiO2 | 500 | 1.02 x 10-6 | 104.9 |
K2O-Sm2O3-12SiO2 | 600 | 4.90 x 10-6 | 104.9 |
K2O-Sm2O3-14SiO2 | 500 | 6.57 x 10-7 | 94.9 |
K2O-Sm2O3-14SiO2 | 600 | 2.99 x 10-6 | 94.9 |