|発明の名称||MANUFACTURING APPARATUS FOR THERMOELECTRIC CONVERSION MATERIAL|
PROBLEM TO BE SOLVED: To provide a manufacturing apparatus for a thermoelectric conversion material by which a high-performance low-temperature thermoelectric conversion material and a high-performance intermediate-temperature thermoelectric conversion material can be obtained by a plastic working operation.
SOLUTION: The manufacturing apparatus for the thermoelectric conversion material comprises special-steel dies 2, 3, 4, 5 which form a tube and are coated with a metal carbide and/or a metal nitride, and special-steel upper and lower punches 7, 8 which are fitted and inserted to the tube part from both end sides so as to be relatively movable, which form a hollow chamber 9 in the tube part and are covered with a coating layer. A material 10 such as an ingot material, a sintered material or the like which mutually converts heat energy and electric power is arranged inside the hollow chamber 9, the material 10 is pulse-electrified so as to be heated, the upper and lower punches 7, 8 are relatively moved, and the material 10 is pressurized so as to be compressed and worked to the thermoelectric conversion material in a predetermined shape.
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