Protonic Conduction of Nanostructured Y-Doped BaZrO₃

Figure 4

(a) Schematic diagrams of a bricklayer model for a polycrystalline ceramic and impedance spectra (Nyquist plots) expected from the current path of n-YSZ and n-BZY at low temperatures. (b) Capacitance of n-BZY measured under dry and water-saturated air, as a function of temperature. The grain boundary capacitance of n-YSZ was compared with that of n-BZY.

(a)

(b)