Semiconducting Nb2O5-doped BaTiO3 was prepared and characterized by x-
ray diffraction, electron microscopy, thermogravimetry and electrical
measurements. The addition of the Nb2O5 donor dopant does not affect t
he sequence of chemical reactions during synthesis of the ceramic mate
rial. The effect of microstructure on the semiconducting properties of
barium titanate was studied. Electrically stable (Ba1-yCay)(Ti1-xNbx)
O-3 ceramics were prepared.