Effect of interface thermal resistance on thermoelectric properties of acoustically mismatched composite

In this study, the synergistic effect of particle size dispersed phase and interface thermal resistance (R$_{int}$) between phases on phonon conductivity ($\kappa_{ph}$) (1-x)La$_{0.95}$Sr$_{0.05}$Co$_{0.95}$Mn$_{0.05}$O$_3$/(x)WC thermoelectric composite, is demonstrated. Further, correlation R$_{int}$ Kapitza radius discussed using Bruggeman's asymmetrical model. particular, polycrystalline La$_{0.95}$Sr$_{0.05}$Co$_{0.95}$Mn$_{0.05}$O$_3$ sample synthesized a standard-solid state route. The presence WC nanoparticle confirmed from electron microscopy images. Electrical ($\sigma$) increases, Seebeck coefficient ($\alpha$) decreases with increase in conducting volume fraction composite. simultaneous $\sigma$ decrease $\kappa_{ph}$ results an increased figure merit (zT) for A maximum zT $\sim$ 0.20 obtained composite x=0.010 at 463 K. present study shows promise to design composites desired considering elastic properties phases.