초록 ▼

Molten thermoelectric alloy expressed as (Bi, Sb).sub.2 (Te, Se).sub.3 is rapidly cooled at 10.sup.4 to 10.sup.6 .degree. K/second so as to crystallize the thermoelectric alloy, and powder of the thermoelectric alloy is hot pressed under the pressure equal to or greater than 400 kgf/cm.sup.2 at 200

Molten thermoelectric alloy expressed as (Bi, Sb).sub.2 (Te, Se).sub.3 is rapidly cooled at 10.sup.4 to 10.sup.6 .degree. K/second so as to crystallize the thermoelectric alloy, and powder of the thermoelectric alloy is hot pressed under the pressure equal to or greater than 400 kgf/cm.sup.2 at 200 degrees to 400 degrees in centigrade for a time period between {(-T/5)+90} minutes and 150 minutes or at 400 degrees to 500 degrees in centigrade for a time period between 5 minutes and 150 minutes so as to increase the figure of merit by virtue of the strain left in the crystal and/or micro crystal grain.

대표청구항 ▼

[ What is claimed is:] [1.] A process of manufacturing a thermoelectric element, comprising the steps of:a) preparing a molten thermoelectric alloy containing at least one first element selected from the group consisting of bismuth and antimony and at least one second element selected from the group

[ What is claimed is:] [1.] A process of manufacturing a thermoelectric element, comprising the steps of:a) preparing a molten thermoelectric alloy containing at least one first element selected from the group consisting of bismuth and antimony and at least one second element selected from the group consisting of tellurium and selenium;b) cooling said molten thermoelectric alloy so as to solidify said thermoelectric alloy;c) powderizing the solidified thermoelectric alloy; andd) shaping the powder of said thermoelectric alloy into a configuration by hot pressing under the conditions thatwhen a temperature ranges from 200 degrees to 400 degrees centigrade, a pressure equal to or greater than 400 kgf/cm.sup.2 is applied to said powder of said thermoelectric alloy for a first time expressed as EQU (-T/5)+90.ltoreq.t.ltoreq.150where T is said temperature and t is said first time in minutes,when said temperature is higher than 400 degrees centigrade but not higher than 500 degrees centigrade, said pressure equal to or greater than 400 kgf/cm.sup.2 is applied to said powder of said thermoelectric alloy for a second time ranging between 5 minutes to 150 minutes.