THERMOELECTRIC MATERIAL AND MANUFACTURING METHOD THEREFOR

• Main Authors: HORIO YUUMA, SUZUKI JUNYA
• Format: Patent
• Language: English
• Published: 29.08.2003
• Edition: 7
• Subjects: ALLOYS; CASTING; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide a thermoelectric material where power consumption at a high temperature can be reduced while a high performance index is maintained and to provide the manufacturing method. SOLUTION: A pressure application face when a solidified molding is hot- pressed is restricted and a face vertical to the pressure application face is depressed with pressure. Crystal grains where a face C vertical to the applying direction of pressure are shifted to an expanding direction with the expansion of the solidified molding. The crystal grains where the face C is parallel to the applying direction of pressure are shifted to the expanding direction while they rotate by 90° with an axis (a) as a rotation axis. Thus, the face C of the crystal grains and the axis (a) are adjusted. In the thermoelectric material, an axis (c) is adjusted to a pressurizing axis direction at the time of swage molding. Since a direction parallel to the face C is that where specific resistance (ρ) is low, a Peltier element (a thermoelement) is assembled so that the direction becomes a conduction direction. Consequently, the high performance index (Z) can be obtained. COPYRIGHT: (C)2003,JPO