The effects of the co-doping of Y in Fe-doped BaZrO₃ (BaZr_0.7-yFe_0.3Y_yO_3-δ) on the phase relation and electrical properties are investigated in this study. While a single phase is formed up to y = 0.1 by the substitution of Y for Zr-sites (phase-1), the amphoteric substitution of Y for both Zr-sites and Ba-site (phase-2) is observed above y = 0.1. Electrical conductivity measurements suggest that p-type conduction prevails under an oxidizing atmosphere. The hole conductivity increases with an increase of Y concentration up to y = 0.1, but a further increase of Y concentration causes a decrease in the conductivity. The maximum conductivities of both bulk and grain boundary are obtained at y = 0.1, and a further increase of Y concentration leads to a decrease of the conductivity due to the possible formation of phase-2 with the partial replacement of Y for Ba-sites ($Y_{Ba}^{•}$). Partial proton conductivity is also improved by Y-doping up to y = 0.1, but a further doping cannot contribute to an increase in the proton conductivity. The results indicate that the mixed proton and hole conductivity of Fe-doped BaZrO₃ can be improved by the co-doping of a rare-earth acceptor (Y³⁺), but the doping level is limited to y = 0.1 to avoid the formation of phase-2.

Y的Fe掺杂的BaZrO共掺杂的效果₃（BaZr _{0.7- ý}的Fe _0.3 ý _ý ö _{3- δ}）上的相位关系和电性能在本研究中进行了研究。 通过Y替代Zr-位点（阶段1）形成一个单相，直到y = 0.1，但在y  =之上观察到Y对Zr-位点和Ba位点的两性取代（阶段2）。0.1。电导率测量表明，在氧化气氛下存在p型导电。空穴电导率随着Y浓度的增加而增加，直至y ＝ 0.1，但是Y浓度的进一步增加导致电导率降低。在y  = 0.1时获得了晶界和晶界的最大电导率，Y浓度的进一步增加导致电导率下降，这是由于可能形成了相2（其中部分Y取代了Ba位点）（${ÿ}_{乙\mathrm{一个}}^{•}$）。Y掺杂直至y  = 0.1也可改善部分质子电导率，但进一步的掺杂不能促进质子电导率的提高。结果表明，稀土受体（Y ³⁺）的共掺杂可以改善Fe掺杂的BaZrO _3的质子和空穴的混合电导率，但 为了避免形成，将掺杂量限制在y = 0.1以内。第二阶段