Comparison of Thermal Expansion Coefficient in Ln0.6Sr0.4Co0.2M0.8O3-δ (Ln=La,Nd,Sm and M=Fe,Ni,Mn) as Cathode Materials for Solid Oxide Fuel Cell


Department of Ceramic, Materials and Energy Research Center, Karaj, Iran


In this study, Thermal expansion coefficient (TEC) variation of Ln0.6Sr0.4Co0.2M0.8O3−δ (Ln=La,Nd,Sm and M= Fe,Ni,Mn) perovskite oxide have been evalouated. Different compounds have been prepared and thermal expansion coefficient have been meseaured in different temperature by means of dilatometer analysis. Structural parameters of compounds have been  determined by X-ray diffraction and Field Emission Scanning Electron Microscopy (FE-SEM) has been used for the morphological study. Experimental results have shown TEC decreases favorably with substitution of  Nd3+ and Mn3+ ions in the lattice


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