| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1297689 | Solid State Ionics | 2010 | 5 Pages |
In-situ X-ray diffraction (XRD) and micro-Raman scattering have been used to study the thermal stability of lithium fluoride (LiF)-added (7% weight ratio) Ba(Zr0.8−xCexY0.2)O2.9 (BZCY: x = 0.1 and 0.2) proton-conducting ceramic powders as a function of temperature in 1 atm of flowing CO2. This work reveals that LiF-addition can reduce the thermal stability of Ba(Zr0.8−xCexY0.2)O2.9 in CO2 and cause decomposition to BaCO3, and possibly Ba3Ce2(CO3)5F2 (or CeCO3F), and Y2O3-like compound after exposure to CO2 from high temperatures. LiF-related compounds can be removed after calcining (or sintering) in air above 1200 °C, but a minor amount of a Y2O3-like compound could remain after calcining at 1400 °C in air.
Research highlights► Thermal stability of LiF-added Ba(Zr0.8-xCexY0.2)O2.9 proton-conducting ceramics. ► Reduction of thermal stability in CO2 by LiF addition in Ba(Zr0.8-xCexY0.2)O2.9. ► Removal of LiF after calcining (or sintering) in air above 1200°C.
