| Summary: | 碩士 === 國立臺北科技大學 === 車輛工程系所 === 103 === This research of metallurgy alloy based on zone melting method process to produce thermoelectric material alloy powder, which are (Bi2Te3)x(Sb2Te3)1-x and Bi2Te3-xSex. By using cold-press to form thermoelectric bulk and analyze their Seebeck coefficient, conductivity, thermal properties, thermoelectric figure of merit when different pressure, sintered temperature. We combine Sn42Bi58 solder and cooper electrical conductor to make the thermoelectric generator. We increase the cold pressure from 306.5Mpa to 766.4Mpa, we can obtain not only the higher relative density but also the better Seebeck coefficient. The P-type Seebeck coefficient of Bi0.4Sb1.6Te3 is from 183.6μV/K to 191μV/K, Bi0.4Sb1.6Te3 is from 137.3 μV/K to 150.6μV/K. The N-type Seebeck coefficient of Bi2Te2.55Se0.45 is from -182.5 μV/K to -186μV/K, Bi2Te2.76Se0.24 is from -207.5μV/K to -210.3μV/K. After Hall effect experimentation, the results show the conductivity of Bi0.4Sb1.6Te3 metallurgy alloy is higher from 71.3S/cm to 262S/cm, Bi0.5Sb1.5Te3 is higher from 1.03S/cm to 619S/cm. In the ZT measurement, we found the ZT of Bi0.5Sb1.5Te3 is 1.1 and the ZT of Bi2Te2.55Se0.45 is 0.8 due to their smaller 30um diameter.
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