An Optimization of Composition Ratio among Triple-Filled Atoms in In0.3-x-yBaxCeyCo4Sb12 System

Abstract EN

Bulk nanostructured materials are important as energy materials.

Among thermoelectric materials, the skutterudite system of CoSb3 is a representative material of bulk nanostructured materials.

Filling a skutterudite structure with atoms that have different localized frequencies (also known as triple filling) was reported to be effective for lowering thermal conductivity.

Among studies representing superior power factors, In-filled skutterudite systems showed higher Seebeck coefficients.

This study sought to optimize the composition ratio among the triple-filled atoms in an In0.3-x-yBaxCeyCo4Sb12 system.

The composition dependence of the thermoelectric properties was investigated for specimens with different ratios among the three kinds of filler atoms in the In0.3-x-yBaxCeyCo4Sb12 system.

In addition, the process variables were carefully optimized for filled skutterudite systems to obtain a maximum ZT value.