Синтез и изучение электрохимических свойств твердых растворов на основе ниобата лантана

Abstract

The solid solutions with general formula 1 1 4 La Bi Nb W O x x y y have been prepared by solid state synthesis. Analysis of the powder X-ray diffraction data has shown that the samples crystallize in monoclinic space group I2/b and triclinic space group P-1. Some specimens with the composition 1 4 LaNb W O  y y and 1 1 4 La Bi Nb W O x x y y show additional peaks due to a modulated structure presence. Electrical conductivity was studied by impedance spectroscopy. The studied materials are promising ionic conductors, with the highest conductivity values about 1.1×10−5 S*cm−1 at 1073 K and 1.0×10−6 S*cm−1 at 873 K.W-doped solid solutions have the highest overall conductivity.