Synthesis and electrical properties of nanostructured Ba2SnYO5.5 proton conductor

Y.Z. Wang (1) , Anthony Chesnaud (2) , Emile Bévillon (1) , Guilhem Dezanneau (1) , Jinlong Yang

1 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
2 MAT - Centre des Matériaux

Ba2SnYO5.5 nanopowders were synthesized by a gel polymerization method. In this process, a gel containing Ba, Sn and Y cations has been obtained by the polymerization of acrylic acid using N,N′-methylene bis-acrylamide as a cross-linking reagent and hydrogen peroxide as an igniting reagent. The gel was calcined at 1200 °C, giving rise to the Ba2SnYO5.5 single-phase nanopowders with the grain size ranging from 50 nm to 70 nm. Nanopowders were sintered at 1150 °C by spark plasma sintering (SPS) to obtain dense nanostructure materials (> 95%) containing grains whose size ranges between 70 nm and 100 nm. Nanostructured Ba2SnYO5.5 shows a good chemical stability in wet atmosphere. However, its protonic conductivity decreases compared with that of microcrystallin Ba2SnYO5.5 ceramics.

Mots clés: Ba2SnYO5.5; Nanostructure; Spark plasma sintering; Proton conduction

Domaines: Sciences de l'ingénieur [physics]; Matériaux

Y.Z. Wang, Anthony Chesnaud, Emile Bévillon, Guilhem Dezanneau, Jinlong Yang. Synthesis and electrical properties of nanostructured Ba2SnYO5.5 proton conductor. Ceramics International, 2011, 37, pp.3351-3355. ⟨10.1016/j.ceramint.2011.05.135⟩. ⟨hal-00652957⟩