Glass formation occurred, in the Na2O-Ta2O5-P2O5 system, in the region of the
composition, Na4TaP3O12. The glasses which were investigated here were characterized by a marked Na+ mobility (tables 146 and 147), when compared with that of other glassy oxide electrolytes with a Na+ content of about 1.5 x 1022/cm3. This was verified by means of impedance spectroscopy and was explained in terms of the existence of a NASICON-like arrangement of oxo-coordination polyhedra in the glass network.
C.Kaps, D.Beyer, R.Schubert: Solid State Ionics, 1994, 70-71, 385-9
Table 146
Ionic Conduction Parameters of Na2O-Ta2O5-P2O5 Glasses
Ta2O5(mol%) | P2O5(mol%) | log[o(S/cm)] | Q(eV) |
12.5 | 37.5 | 2.27 | 0.57 |
7.5 | 37.5 | 2.28 | 0.59 |
12.5 | 32.5 | 2.21 | 0.53 |
Table 147
Ionic Conductivity of Na2O-Ta2O5-P2O5 Glasses at 300K
Ta2O5(mol%) | P2O5(mol%) | log[D(S/cm)] |
12.5 | 37.5 | -2.66 |
7.5 | 37.5 | -2.93 |
12.5 | 32.5 | -2.47 |