Preparation of Mg_2Si-MnSi_1.73 Thermoelectric Materials by Using Mechanical Alloying and Pulsed Current Sintering

摘要

The formation process of a Mg_2Si-MnSi_1.73 thermoelectric device made by mechanical alloying (MA) and pulsed current sintering was investigated. MA was performed in a planetary ball mill using two elemental powders of each material. The MA powders were consolidated by pulsed current sintering method. The Seebeck coefficient of Mg_2Si sintered at 773 K under 250MPa was -366μV/K at room temperature. However, the electric conductivity of the obtained Mg_2Si was very small and about 0.04S/m.