It was recalled that the Cu-substituted vanadate, Bi2V0.9Cu0.1O5.35 (BICUVOX), exhibited high O-ion conductivities at low temperatures. The ionic conductivity (table 26) at 300C (about 0.001S/cm) was 50 to 100 times greater than that of any other solid electrolyte within this temperature range. The preparation of sinterable powder by means of solid-state reaction and conventional ceramic powder processing techniques was reported here. The results indicated that densities which were greater than 95% of the theoretical value could be obtained by sintering (800C, 10 to 20h).
S.P.Simner, D.Suarez-Sandoval, J.D.Mackenzie, B.Dunn: Journal of the American Ceramic Society, 1997, 80[10], 2563-8
Table 26
Ionic Conductivity of Bi2V0.9Cu0.1O5.35
Theoretical Density (%) | Temperature (C) | σ (S/cm) | E (eV) |
85.9 | 200 | 0.20 x 10-3 | 0.63 |
85.9 | 400 | 1.46 x 10-2 | 0.63 |
85.9 | 600 | 1.05 x 10-1 | 0.48 |
93.7 | 200 | 0.30 x 10-3 | 0.62 |
93.7 | 400 | 1.68 x 10-2 | 0.62 |
93.7 | 600 | 9.97 x 10-2 | 0.46 |
92.1 | 200 | 0.70 x 10-3 | 0.53 |
92.1 | 400 | 1.96 x 10-2 | 0.53 |
92.1 | 600 | 1.13 x 10-1 | 0.47 |
87.9 | 200 | 0.30 x 10-3 | 0.59 |
87.9 | 400 | 1.46 x 10-2 | 0.59 |
87.9 | 600 | 9.25 x 10-2 | 0.47 |
92.9 | 200 | 0.20 x 10-3 | 0.70 |
92.9 | 400 | 1.70 x 10-2 | 0.70 |
92.9 | 600 | 9.74 x 10-2 | 0.56 |
95.6 | 200 | 0.40 x 10-3 | 0.58 |
95.6 | 400 | 1.93 x 10-2 | 0.58 |
95.6 | 600 | 1.11 x 10-1 | 0.46 |
97.3 | 200 | 0.30 x 10-3 | 0.51 |
97.3 | 400 | 1.61 x 10-2 | 0.51 |
97.3 | 600 | 8.62 x 10-2 | 0.51 |
96.8 | 200 | 0.30 x 10-3 | 0.60 |
96.8 | 400 | 1.87 x 10-2 | 0.60 |
96.8 | 600 | 1.13 x 10-1 | 0.52 |