fig5

Figure 5. Total conductivity of proton conductors at 500 °C. Abbreviations: (1) BaZr_0.1Ce_0.7Y_0.2O_3-δ, BZCY172^[45]; (2) BZCYYb1711^[45]; (3) BZCYYb4411^[47]; (4) BZCYYb4411^[53]; (5) BaSc_0.8Mo_0.2O_2.8^[48]; (6) BaLaInO₄^[50]; (7) Ba₇Nb₄MoO₂₀^[54]; (8) Ba₅Er₂Al₂ZrO₁₃^[51]; (9) γ-Ba₄Ta₂O₉^[55]; (10) Ba₂In₂O₅^[49]; (11) La_0.99Ca_0.01NbO₄^[56]; (12) La_0.99Ca_0.01TaO₄^[52]; (13) Nd_0.99Ca_0.01TaO₄^[52]; (14) Gd_0.99Ca_0.01TaO₄^[52]; (15) Er_0.99Ca_0.01TaO₄^[52]; (16) La_0.8Ba_1.2GaO_3.9^[49]; (17) La_1.95Ca_0.05Zr₂O₇^[49]; (18) La₂Ce₂O₇^[49]; (19) La_1.95Ca_0.05Ce₂O₇^[57].