| 简介 |
A method is provided for producing a thermoelectric object for a thermoelectric conversion device starting with a powder having a bulk density ds, a theoretical density di and comprising elements in the ratio of a Half-Heusler alloy. The powder is then mechanically compressed and a green body is formed having a tap density dK; the tap density dK being up to 30% of the theoretical density df greater than the bulk density ds of the powder. The green body with the tap density is then sintered to produce a thermoelectric object with a density ds which is greater that 95% of the theoretical density di. Alternatively, a thermoelectric material can be produced from a powder containing a mixture which forms a αβχ compound wherein α is from the group of elements consisting Sc, Ti, V, Mn, Y, Zr, Nb, La, Hf, Ta and one or more of the rare earth elements, β being one or more of Fe, Co, Ni, Cu, and Zn and χ being one or more of the group consisting Al, Ga, In, Si, Ge, Sn, Sb, and Bi and the sum of the valence electrons lying between 17.5 and 18.5, before being compressed and sintered. |
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