Ermiş I.Çorumlu V.Sertkol M.Öztürk M.Kaleli M.Çetin A.Turemiş M.Arı M.2024-07-222024-07-22201603615235http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/15764The solid electrolyte is one of the most important components for a solid oxide fuel cell (SOFC). The various divalent or trivalent metal ion-doped bismuth-based materials exhibit good ionic conductivity. Therefore, these materials are used as electrolytes in the SOFC. In this paper, the samples of (Bi0.92−xHo0.03Er0.05)2O3 + (ZnO)x solutions with a 0 ≤ x ≤ 0.2 molar ratio are synthesized by the solid state reaction method. The detailed structural and electrical characterizations are investigated by using x-ray diffraction (XRD), alternating current electrochemical impedance spectroscopy, and scanning electron microscopy (SEM). The XRD patterns of all samples are indexed on a monoclinic symmetry with a P21/c space group. In addition, the rietveld parameters are determined by using the FullProf software program. The impedance measurements of the samples are obtained at the 1 Hz to 20 MHz frequency range. The impedance value of the pellets increases with temperature. Based on the impedance results, it is found that the contribution of grain (bulk) is more than a grain boundary in terms of conductivity, which permits the attribution of a grain boundary. The ionic conductivity decreases with an increasing amount of Zn contribution. The value of highest electrical conductivity among all samples is calculated as 0.358 S cm−1 at 800°C for undoped (Bi0.92Ho0.03Er0.05)2O3. © 2016, The Minerals, Metals & Materials Society.EnglishActivation energyBismuth compoundsCharacterizationElectric conductivityElectric impedance measurementElectrochemical impedance spectroscopyErbium compoundsFuel cellsGrain boundariesHolmium compoundsII-VI semiconductorsIonic conductivityMetal ionsMetalsScanning electron microscopySolid oxide fuel cells (SOFC)Solid state reactionsX ray diffractionZinc oxideAlternating currentBismuth-based materialsElectrical characterizationElectrical conductivityImpedance measurementMonoclinic symmetrySoftware programSolid state reaction methodSolid electrolytesArticle10.1007/s11664-016-4799-4