Thermal stability and preparation of dense membrane ceramics of BIMEVOX - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Solid State Ionics Année : 2005

Thermal stability and preparation of dense membrane ceramics of BIMEVOX

Résumé

The thermal stability and sintering conditions of a series of BIMEVOX compounds was studied. Extended annealing at temperature below the γ/γ′ phase transition, revealed the materials doped with a MeV cation are more stable than other BIMEVOXes. A modification of the BIMEVOX doped with a MeII metal was generally observed after annealing at 450 °C for several weeks. In contrast, no evolution was noticed for BISBVOX.15, BINBVOX.25, BITAVOX.20 compositions annealed for 10 weeks at 450 °C and 7 weeks at 500 °C. These latter compositions exhibit higher melting point and require sintering temperatures above 850 °C. Moreover, the increase in thermal expansion coefficient observed in these materials at the transition of phase is smaller (14 K− 1 to 14.5 K− 1) than for the other BIMEVOXes which makes them promising candidates as membrane for oxygen separators or catalytic dense membrane reactors.

Dates et versions

hal-00105480 , version 1 (11-10-2006)

Identifiants

Citer

Marlu César Steil, Françoise Ratajczak, Edouard Capoen, Caroline Pirovano, Gaëtan Mairesse, et al.. Thermal stability and preparation of dense membrane ceramics of BIMEVOX. Solid State Ionics, 2005, 176, pp.2305-2312. ⟨10.1016/j.ssi.2005.06.017⟩. ⟨hal-00105480⟩
40 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More