Estimation of the protonic concentration and mobility in Ba(Zr0.81Yb0.15Zn0.04)O3-δ ceramic
- Estimation of the protonic concentration and mobility in Ba(Zr0.81Yb0.15Zn0.04)O3-δ ceramic
- 박종성; 이종호; 이해원; 김병국
- SOFC; Proton conductor; Barium zirconate; Defect model; ZnO addition
- Issue Date
- Solid state ionics
- VOL 192, NO 1, 88-92
- Rare earth doped BaZrO3 is one of most promising proton conducting oxides as it has high proton
conductivity and sound chemical stability. Sintering aids such as ZnO, however, should be incorporated in
order to improve poor sinterability. In this study, the effects of adding ZnO on proton conductivity of Ybdoped
BaZrO3 (BZYb) were investigated. From the electrical conductivities measured under various water
vapor pressures, concentration andmobility of the proton were obtained. Protonmobility of BZYb with ZnO
(BZYb–Zn) was smaller than that of BZYb while hydration enthalpy of BZYb–Zn was more negative than
that of BZYb.
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