Preparation and ionic conductivity of new Bi12.5Lu1.5ReO24.5 phase

TL;DR

This study reports the synthesis, structural analysis, and high ionic conductivity of a new Bi12.5Lu1.5ReO24.5 phase, demonstrating its potential for moderate temperature applications in ion conduction.

Contribution

The paper introduces a novel Bi12.5Lu1.5ReO24.5 phase synthesized for the first time, with detailed structural characterization and high ionic conductivity at moderate temperatures.

Findings

Phase has space group Fm3m with lattice parameter 5.5591 Å.

High ionic conductivity observed at 600-800 K.

Conductivity at 800 K comparable to similar known phases.

Abstract

The substitution of Re into Bi2O3 allows stabilization of the d- Bi2O3 structure by additional substitution of lutetium ion to give phase of composition Bi12.5Lu1.5ReO24.5. The phase was synthesized for the first time. Structural analysis performed by neutron diffraction showed that space group was Fm3m with lattice parameter a = 5.5591(2) {\AA}. The phase has been found to show high ion conductivity at moderate temperature. The conductivity was measured in the temperature range of 600-800 K. The conductivity of Bi12.5Lu1.5ReO24.5 at 800 K is the same as the conductivity of BiCuVOx, Bi12.5Ln1.5ReO24.5 (Ln = Eu, La, Nd) phases. In this connection the Bi12.5Lu1.5ReO24.5 phase offers excellent potential for moderate temperature application.