Thermoelectric properties of Ca0.9Yb0.1MnO3-x prepared by spark plasma sintering in air atmosphere

Jacques G. Noudem (1, 2) , Simon Quetel-Weben (2) , Richard Retoux (2) , Geoffroy Chevallier (3) , Claude Estournès (3)

1 LUSAC - Laboratoire Universitaire des Sciences Appliquées de Cherbourg
2 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
3 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

In this paper we report the densification of Ca0.9Yb0.1MnO3-x ceramics by spark plasma sintering (SPS) in different atmospheres and using different tools. The thermoelectric properties of these ceramics are reported and compared to those of ceramics obtained by conventional sintering. This study clearly demonstrated the possibility for processing oxide materials by SPS under air atmosphere and overcomes the problem of reduction due to the low oxygen partial pressure (graphitic environment, dynamic vacuum or neutral atmosphere) commonly encountered.

Mots clés: Ca0.9Yb0.1MnO3-x; Spark plasma sintering; Air processing; Microstructure; Oxide thermoelectric properties

Domaines: Matériaux; Micro et nanotechnologies/Microélectronique

Jacques G. Noudem, Simon Quetel-Weben, Richard Retoux, Geoffroy Chevallier, Claude Estournès. Thermoelectric properties of Ca0.9Yb0.1MnO3-x prepared by spark plasma sintering in air atmosphere. Scripta Materialia, 2013, vol. 68, pp. 949-952. ⟨10.1016/j.scriptamat.2013.02.059⟩. ⟨hal-00864724⟩