Electron-doped layered perovskite KCa2-xLaxNb3O10 was prepared from KNbO3, Nb2O5, Nb, La2O3 and KCa2Nb3O10 at 1200°C for 10 h under Ar. Essentially single-phase KCa2-xLaxNb3O10 with plate-like morphology was obtained with 0≤x≤0.3, and lattice parameters increased with increasing x. All the La-doped products showed semiconducting behaviour. Linear (log ρ)-T relationships were clearly observed, but the resistivity behaviour deviates from the linear relationship at lower temperatures. A possible conduction mechanism is discussed.
ASJC Scopus subject areas
- Materials Chemistry