Spherical pellets of BaTiO3 and Ba0.67Sr0.33TiO3 perovskite-type compounds made by a sol-gel oil drop process for non-thermal plasma applications

Benoît Fournaud (1) , S. Rossignol (2) , Jean-Michel Tatibouet (1) , S. Thollon (3)

1 LACCO - Laboratoire de catalyse en chimie organique
2 GEMH - Groupe d'Etudes des Matériaux Hétérogènes
3 LTS - Laboratoire Technologies des Surfaces

In this work, a method for preparing nanomaterials shaped into powder and balls (diameter: 1-2mm) is developed. The synthesis is performed by an oil-drop process using a sol-gel method. During the preparation, the sol was improved by the inclusion of some additives such as methylethylketone (MEK), Butvar (But) and ethylmethacrylate (EMC). BaTiO3 and Ba0.67Sr0.33TiO3 perovskite-type compounds synthesized by both procedures present the same physical-chemical properties. The development of this sol-gel process enables the formation of these shapes in amounts as large as the 50 g scale in a laboratory. The use of synthesized spherical pellets in a non-thermal plasma reactor enables the increased conversion of ethanol when acting as a pollutant.

Mots clés: shape forming; oil-drop process; perovskite structure

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

Benoît Fournaud, S. Rossignol, Jean-Michel Tatibouet, S. Thollon. Spherical pellets of BaTiO3 and Ba0.67Sr0.33TiO3 perovskite-type compounds made by a sol-gel oil drop process for non-thermal plasma applications. Journal of Materials Processing Technology, 2009, 209 (5), pp.2515-2521. ⟨10.1016/j.jmatprotec.2008.05.046⟩. ⟨hal-00630506⟩