HOT-PRESS SINTERING APPARATUS, BLOCK THERMOELECTRIC MATERIAL OF MICRO-NANO POROUS STRUCTURE, AND MANUFACTURING METHOD THEREFOR

摘要

A hot-press sintering apparatus, a method for manufacturing a thermoelectric material by using the hot-press sintering apparatus, and a thermoelectric material having a multi-scale micro-nano porous structure. The hot-press sintering apparatus comprises an upper electrode (1), a lower electrode (7), a water-cooling vacuum chamber (2), and a mold set. The mold group comprises a mold body (8), an upper pressing head (4), and a lower pressing head (6). The mold body is provided with a through hole in a height direction; the sum of the heights of the upper pressing head and the lower pressing head is smaller than the height of the mold body; during operation, the mold set is provided in the water-cooling vacuum chamber, the upper electrode and the lower electrode press the upper pressing head and the lower pressing head into the through hole of the mold body until the upper pressing head and the lower pressing head are leveled with an upper end face and a lower end face of the mold body, and a sample chamber for holding a sample is provided inside the through hole of the mold body. The chemical formula of the thermoelectric material having the multi-scale micro-nano porous structure is Mg_3.2-xMn_xSb_1.5-yBi_0.5Te_y, wherein 0.0125 ≤ x ≤ 0.1, and 0.01 ≤ y ≤ 0.05.