Anthony Chesnaud

PREPARATION AND CHARACTERIZATION OF IN-SUBSTITUTED BaSnO3 COMPOUNDS

In-substituted BaSnO3 (BaSn1-xInxO3-δ, x = 0.125, 0.25 and 0.50) compounds were prepared by a gel polymerization method. Their microstructure, hydration energy and electrical properties were investigated. Single phases were confirmed by X-ray diffraction analysis over the whole range of substitution, and were identified as cubic perovskite-like structure. The grain size and conductivities of samples measured under dry and wet atmospheres increase significantly with indium content as such, 1–2 μm for BaSn0.875In0.125O3-δ(x = 0.125) and 20 μm for BaSn0.50In0.50O3-δ(x = 0.50). The highest proton conductivity at 600°C, σ = 9.5 × 10-4 S⋅cm-1, is obtained for BaSn0.5In0.5O2.75(x = 0.50).