On the use of NiO as sintering additive for BaCe0,9Y0,1O3 − α

Rémi Costa (1) , Nicolas Grunbaum (2) , Marie-Hélène Berger (1) , Laurent Dessemond (2) , Alain Thorel (1)

1 CDM - Centre des Matériaux
2 LEPMI - Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces

The effect of nickel oxide addition on the densification behaviour and electrical conductivity of BaCe0.9Y0.1O3 − α (BCY10) is investigated. Small addition (4 mol%) of this sintering aid reduces the sintering temperature by 200 °C and promotes the densification. 95% of the theoretical density was reached after sintering at 1250 °C for 10 h in air. Addition of NiO has no detrimental effect on the total conductivity of BCY10 in wet hydrogen. Nevertheless, the activation energy of the recorded blocking effect is higher than that of the bulk contribution, indicating different electrical properties between grains and internal interfaces in pure and NiO doped BCY10.

Mots clés: Proton conductor; Perovskite; Sintering; BaCeO3; NiO

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Rémi Costa, Nicolas Grunbaum, Marie-Hélène Berger, Laurent Dessemond, Alain Thorel. On the use of NiO as sintering additive for BaCe0,9Y0,1O3 − α. Solid State Ionics, 2009, 180, pp.891-895. ⟨10.1016/j.ssi.2009.02.018⟩. ⟨hal-00399526⟩