| Abstract Scope |
Thermoelectric materials convert temperature gradients directly into electrical energy, making them promising candidates for waste heat recovery and sustainable energy conversion. In SrTiO3-based perovskite oxides, thermoelectric performance is strongly influenced by crystal structure, phase purity, lattice distortion, and chemical homogeneity. In this study, a systematic series of Ru- and La-substituted SrTiO3-based perovskites was synthesized to investigate how compositional modification affects structural evolution. X-ray diffraction was employed to identify phase formation and crystal structure, Raman spectroscopy was used to examine lattice vibrations and local distortions, and X-ray fluorescence was performed to verify elemental composition and chemical homogeneity. The combined characterization establishes structure-composition relationships across the material series and provides insight into phase stability, lattice behavior, and compositional uniformity. These structural findings provide a foundation for interpreting companion thermoelectric transport trends and support rational design of SrTiO3-based perovskites for waste heat recovery applications through improved understanding of structure–property relationships in oxides. |