GdBaFe₂O_5+δ doping with Ca to subsitute Ba in A site were prepared by the citric-nitrate process. The effects of different contents of Ca on the physical and chemical properties and electrochemical properties of GdBa_1-xCa_xFe₂O_5+δ were investigated. It is shown that with the increasing of Ca content, GdBa_1-xCa_xFe₂O_5+δ remains pure phase within the amount of doping is less than 20%, otherwise BaFe₂O₄ miscellaneous phase appears. The XPS result shows that the valence of Fe increases continuously, that is, Fe³⁺ continuously changes to Fe⁴⁺, as the content of Ca increases. According to the principle of conservation of charge, the oxygen content of the material increases continuously. However, with the further increase of Ca content, the high-speed oxygen conduction on the ab axis is affected when the BaO bond is destroyed to a certain degree, and the conduction velocity is significantly reduced (dominant factor), resulting the highest conductivity 9.57 S cm⁻¹ at Ca content of 10%. With the increase of Ca content, electron hole and oxygen content in the material are increasing, also led to the continuous decrease of the polarization resistance of the material, when the Ca content ascended to 20%, the minimum polarization impedance will be to 0.0415 Ω cm², δ increases to 5.8199, and the polarization process increases.

通过柠檬酸硝酸法制备了Ca掺杂的GdBaFe ₂ O _{5 +δ}取代A位的Ba。研究了不同Ca含量对GdBa _1-x Ca _x Fe ₂ O _{5 +δ的}理化性能和电化学性能的影响。结果表明，随着Ca含量的增加，GdBa _1-x Ca _x Fe ₂ O _{5 +δ}在掺杂量小于20％时仍保持纯相，否则出现BaFe ₂ O ₄杂相。XPS结果表明，Fe的化合价不断增加，即Fe ³⁺随着Ca含量的增加，Fe逐渐变为Fe ⁴⁺。根据电荷守恒定律，材料中的氧含量不断增加。但是，随着Ca含量的进一步增加，Ba O键被破坏到一定程度时，会影响ab轴上的高速氧传导，并且传导速度显着降低（主要因素），从而导致最高的传导率。Ca含量为10％时为9.57 S cm ^-1。随着Ca含量的增加，材料中的电子空穴和氧含量增加，也导致材料的极化电阻不断降低，当Ca含量上升到20％时，最小极化阻抗将达到0.0415Ω。厘米²，δ增加到5.8199，并且极化过程增加。