Pulverized and Intermixed Elements Sintering Method for (Bi, Sb)2(Te, Se)3 based n-type Thermoelectric Devices
1991 Volume 111 Issue 6 Pages 670-674
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1991 Volume 111 Issue 6 Pages 670-674
The Pulverized and Intermixed Elements Sintering (PIES) method, which can eliminate the use of a powder consisting of fully reacted alloys, is successfully achieved for the preparing of n-type (Bi, Sb)2(Te, Se)3 based thermoelectric devices for the first time. Hence the PIES method can substantially reduce the manufacturing cost of thermoelectric devices such as (Bi, Sb)2(Te, Se)3 based one.
It is proved that the solid solution formation of PIES device is occurred in the sintering process and in order to get the useful thermoelectric performance a strong intermixing force such as a large centrifugal force in a planetary ball mill is necessary by X-ray diffractometory and measurement of thermoelectric properties.
The thermoelectric figure of merit of PIES devices is about 1.7×10-31/K at 300K, and there is plenty of room for improvement in the PIES method to obtain higher figure of merit.
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