“…However, the melting point of YSZ is high, so the skeleton formed by YSZ is almost unchanged. That's to say, the radius of YSZ particles keeps unchanged [42]. where Zel-el, Zio-io, Zel-io, Zio-el are coordination number between electron conducting phase and electron conducting phase, ion conducting phase and ion conducting phase, electron conducting phase and ion conducting phase, ion conducting phase and electron conducting phase, respectively; Z is the average coordination number, which is assumed as 6 [43]; r is the particle radius; ψ is the volume fraction of particles.…”