Structure and microstructure of La _0.8 Ca _0.05 Ag _0.15 MnO ₃ material synthesized by sol-gel method

The La _0.8 Ca _0.05 Ag _0.15 MnO ₃ material was prepared by the sol-gel method, sintered at 800°C for 24 hours. The material is derived from the La _0.8 Ca _0.2 MnO ₃ material substituted by 15% Ag on the Ca-site. The substitution changed the lattice parameters, Mn-O bond length, and Mn-O-Mn bond angle. These can affect the transport of electrons from the material. The XRD data were analyzed using Rietveld refinement technique and show the material has a rhombohedral structure with the lattice parameters a, b, and c are 5.494, 5.494, and 13.33, respectively. The SEM data with SE mode show La _0.8 Ca _0.2 MnO ₃ material substituted by 15% Ag seen the existence of agglomeration and porous. Furthermore, the material has a high homogeneity, this is seen in SEM data with BSE mode. The EDX results show that the silver has been successfully substituted into the La _0.8 Ca _0.2 MnO ₃ matrix with the value at% for each element contained in the material close to value at% calculation.