Study on Preparation and Thermoelectric Properties of n-type Bi_2Te_3 Based Material AITranslate
Abstract AITranslate
With Bi2Tea7Se0.3 as basic composition ratio and 99.99% high -purity Te,Bi ＆ Se as raw materi- als,bulk n-type Bi2Te3 based thermoelectric material was prepared by vacuum melting alloying,oxygen- free environment mechanical crushing, precision sieving of powder, and rapid hot pressing with original hot pressing device. The particle size and oxygen content of the alloy powder were determined by particle size analyzer, scanning electron microscope and oxygen nitrogen analyzer. The phase composition of the alloy powder was characterized by X-ray diffractometer,and the bending strength of hot pressed bulk samples was measured. The results of thermoelectric property test show that Seebeck coefficient and ZT value （thermoelectric figure of merit） of hot pressed bulk sample are almost isotropic, but its resistivity and thermal conductivity have strong anisotropy with obviously decreased orientation degree compared with the commercially available zone-melting products. The relative density of the hot pressed bulk sample is as high as 99% ,its bending strength is 87 MPa and the maximum ZT value is about 0.7. The above process has the advantages of simple equipment,low cost and high efficiency, suitable for industrialization.
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Basic Information:
DOI：
Chinese Library Classification Number:TB34[一般工业技术—材料科学与工程]
Citation Information:
With Bi2Tea7Se0.3 as basic composition ratio and 99.99% high -purity Te,Bi ＆ Se as raw materi- als,bulk n-type Bi2Te3 based thermoelectric material was prepared by vacuum melting alloying,oxygen- free environment mechanical crushing, precision sieving of powder, and rapid hot pressing with original hot pressing device. The particle size and oxygen content of the alloy powder were determined by particle size analyzer, scanning electron microscope and oxygen nitrogen analyzer. The phase composition of the alloy powder was characterized by X-ray diffractometer,and the bending strength of hot pressed bulk samples was measured. The results of thermoelectric property test show that Seebeck coefficient and ZT value （thermoelectric figure of merit） of hot pressed bulk sample are almost isotropic, but its resistivity and thermal conductivity have strong anisotropy with obviously decreased orientation degree compared with the commercially available zone-melting products. The relative density of the hot pressed bulk sample is as high as 99% ,its bending strength is 87 MPa and the maximum ZT value is about 0.7. The above process has the advantages of simple equipment,low cost and high efficiency, suitable for industrialization.
quote
| GB/T 7714-2015 | [1] GAO Yuan, CAO Hong-yang. Study on Preparation and Thermoelectric Properties of n-type Bi_2Te_3 Based Material[J]. Rare Metals and Cemented Carbides, 2017(4): 62-66. |
| MLA | [1] GAO Yuan, and CAO Hong-yang. "Study on Preparation and Thermoelectric Properties of n-type Bi_2Te_3 Based Material." Rare Metals and Cemented Carbides, no. 4, 2017, pp. 62-66. |
| APA | [1] GAO Yuan, & CAO Hong-yang. (2017). Study on Preparation and Thermoelectric Properties of n-type Bi_2Te_3 Based Material. Rare Metals and Cemented Carbides(4), 62-66. |
| IEEE | [1] GAO Yuan and CAO Hong-yang, "Study on Preparation and Thermoelectric Properties of n-type Bi_2Te_3 Based Material," Rare Metals and Cemented Carbides, no. 4, pp. 62-66, 2017. keywords: {thermoelectric material;n-type Bi2 Tea based material;powder metallurgy;hot pressing;thermoe- lectric property;orientation} |