A Versatile and Low-Toxicity Route for the Production of Electroceramic Oxide Nanopowders
Résumé
An alternative route to acrylamide gel polymerisation is presented for the preparation of oxide nanopowders. Within this method, cations first dissolved in an aqueous solution are subsequently trapped inside a 3D chelating gel before fast-drying, which leads to a stable precursor. In this study, we have prepared compositions corresponding to a wide range of state-of-the-art fuel cells materials such as: Zr 0.85 Y 0.15 O 1.875 , Ce 0.9 Gd 0.1 O 1.95 , Nd 1.95 NiO 4+x , GdBaCo 2-O 5+x , Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-x and La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3. Thermogravimetry and differential thermal analysis studies have been performed to determine the best calcination conditions. After calcination, the resulting powders have been characterised by X-ray diffraction, FEG-scanning electron