| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a nanocomposite thermoelectric conversion material which has specific shaped phonon scattering particles scattered therein to reduce the thermal conductivity, and thus whose thermoelectric conversion performance is enhanced.SOLUTION: A method is for manufacturing a nanocomposite thermoelectric conversion material having an oxide scattered as phonon scattering particles in a matrix of the thermoelectric conversion material. In a solution, an element constituting the thermoelectric conversion material and an oxide constituting phonon scattering particles are precipitated and grown as respective nanoparticles, by reduction of a salt of the element and by polymerization of a precursor of the oxide, respectively. The method includes a first step for collecting the mixture of these nanoparticles, and a second step for making the mixture an alloy as composite nanoparticles by hydrothermal treatment and then sintering the composite nanoparticles. In the first step, the precipitation and growth of the nanoparticles of the first group element constituting the thermoelectric conversion material is made precede the precipitation and growth of the nanoparticles of the second group element oxide constituting the phonon scattering particles. |
