Abstract
Partial substitution of vanadium with silicon in the compound Bi(4)V(2)O(11), which belongs to the Aurivillius family, leads to the creation of a solid solution Bi(4)V(2-x) Si (x) O(11-δ) (0 ≤ x ≤ 0.4). The compound with x = 0.1 turns out to be a monoclinic α-form of Bi(4)V(2)O(11), while the compounds with x = 0.2 and x = 0.3 are orthorhombic β-polymorphs, and the compound with x = 0.35 is of tetrahedral γ-polymorph. Electrochemical Impedance Spectroscopy has been used to measure the ionic conductivity of doped samples. The ceramic sample with x = 0.1 has the highest ionic conductivity values.