Solid State Ionics, Vol.126, No.1-2, 47-53, 1999
Synthesis and characterization of Ag2SO4-ABO(3) (A = Li/Ba and B=Nb/Ti) heterogeneous solid electrolyte systems
The ionic conductivity of Ag2SO4:BaTiO3 and Ag2SO4:LiNbO3 composite solid electrolyte systems are investigated using complex impedance spectroscopy. More than an order of magnitude enhancement in the ionic conductivity is achieved in case of 70Ag(2)SO(4):30LiNbO(3) compared to pure Ag2SO4. A surface charge transfer mechanism is suggested to understand the microscopic conduction process. The highest conducting (1.82 X 10(-3) (S cm(-1)) at 250 degrees C) composition is found to be promising for SOx electrochemical gas sensor application.