Effect of Ga2O3 Nanoparticles Dispersion on Microstructure and Thermoelectric Properties of p-Type BiSbTe Based Alloys
In this study, p-type Bi0.5Sb1.5Te3 based nanocomposites with addition of different weight percentages of Ga2O3 nanoparticles are fabricated by mechanical milling and spark plasma sintering. The fracture surfaces of all Bi0.5Sb1.5Te3 nanocomposites exhibited similar grain distribution on the entire...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2017-06-01
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| Series: | Archives of Metallurgy and Materials |
| Subjects: | |
| Online Access: | http://www.degruyter.com/view/j/amm.2017.62.issue-2/amm-2017-0140/amm-2017-0140.xml?format=INT |
| _version_ | 1818403608749670400 |
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| author | Kim E.-B. Koo J.-M. Hong S.-J. |
| author_facet | Kim E.-B. Koo J.-M. Hong S.-J. |
| author_sort | Kim E.-B. |
| collection | DOAJ |
| description | In this study, p-type Bi0.5Sb1.5Te3 based nanocomposites with addition of different weight percentages of Ga2O3 nanoparticles are fabricated by mechanical milling and spark plasma sintering. The fracture surfaces of all Bi0.5Sb1.5Te3 nanocomposites exhibited similar grain distribution on the entire fracture surface. The Vickers hardness is improved for the Bi0.5Sb1.5Te3 nanocomposites with 6 wt% added Ga2O3 due to exhibiting fine microstructure, and dispersion strengthening mechanism. The Seebeck coefficient of Bi0.5Sb1.5Te3 nanocomposites are significantly improved owing to the decrease in carrier concentration. The electrical conductivity is decreased rapidly upon the addition of Ga2O3 nanoparticle due to increasing carrier scattering at newly formed interfaces. The peak power factor of 3.24 W/mK2 is achieved for the base Bi0.5Sb1.5Te3 sintered bulk. The Bi0.5Sb1.5Te3 nanocomposites show low power factor than base sample due to low electrical conductivity. |
| first_indexed | 2024-12-14T08:26:58Z |
| format | Article |
| id | doaj.art-7dbf4f4c15d74d85a5f7866bb2bf9606 |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-12-14T08:26:58Z |
| publishDate | 2017-06-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-7dbf4f4c15d74d85a5f7866bb2bf96062022-12-21T23:09:36ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092017-06-0162299399710.1515/amm-2017-0140amm-2017-0140Effect of Ga2O3 Nanoparticles Dispersion on Microstructure and Thermoelectric Properties of p-Type BiSbTe Based AlloysKim E.-B.0Koo J.-M.1Hong S.-J.2Division of Advanced Materials Engineering and Institute for Rare Metals, Kongju National University, Cheonan, Chungnam, 330-717, KoreaDivision of Advanced Materials Engineering and Institute for Rare Metals, Kongju National University, Cheonan, Chungnam, 330-717, KoreaDivision of Advanced Materials Engineering and Institute for Rare Metals, Kongju National University, Cheonan, Chungnam, 330-717, KoreaIn this study, p-type Bi0.5Sb1.5Te3 based nanocomposites with addition of different weight percentages of Ga2O3 nanoparticles are fabricated by mechanical milling and spark plasma sintering. The fracture surfaces of all Bi0.5Sb1.5Te3 nanocomposites exhibited similar grain distribution on the entire fracture surface. The Vickers hardness is improved for the Bi0.5Sb1.5Te3 nanocomposites with 6 wt% added Ga2O3 due to exhibiting fine microstructure, and dispersion strengthening mechanism. The Seebeck coefficient of Bi0.5Sb1.5Te3 nanocomposites are significantly improved owing to the decrease in carrier concentration. The electrical conductivity is decreased rapidly upon the addition of Ga2O3 nanoparticle due to increasing carrier scattering at newly formed interfaces. The peak power factor of 3.24 W/mK2 is achieved for the base Bi0.5Sb1.5Te3 sintered bulk. The Bi0.5Sb1.5Te3 nanocomposites show low power factor than base sample due to low electrical conductivity.http://www.degruyter.com/view/j/amm.2017.62.issue-2/amm-2017-0140/amm-2017-0140.xml?format=INTThermoelectric propertiesBi0.5Sb1.5Te3 alloysSeebeck coefficientMechanical alloyingSpark plasma sintering |
| spellingShingle | Kim E.-B. Koo J.-M. Hong S.-J. Effect of Ga2O3 Nanoparticles Dispersion on Microstructure and Thermoelectric Properties of p-Type BiSbTe Based Alloys Archives of Metallurgy and Materials Thermoelectric properties Bi0.5Sb1.5Te3 alloys Seebeck coefficient Mechanical alloying Spark plasma sintering |
| title | Effect of Ga2O3 Nanoparticles Dispersion on Microstructure and Thermoelectric Properties of p-Type BiSbTe Based Alloys |
| title_full | Effect of Ga2O3 Nanoparticles Dispersion on Microstructure and Thermoelectric Properties of p-Type BiSbTe Based Alloys |
| title_fullStr | Effect of Ga2O3 Nanoparticles Dispersion on Microstructure and Thermoelectric Properties of p-Type BiSbTe Based Alloys |
| title_full_unstemmed | Effect of Ga2O3 Nanoparticles Dispersion on Microstructure and Thermoelectric Properties of p-Type BiSbTe Based Alloys |
| title_short | Effect of Ga2O3 Nanoparticles Dispersion on Microstructure and Thermoelectric Properties of p-Type BiSbTe Based Alloys |
| title_sort | effect of ga2o3 nanoparticles dispersion on microstructure and thermoelectric properties of p type bisbte based alloys |
| topic | Thermoelectric properties Bi0.5Sb1.5Te3 alloys Seebeck coefficient Mechanical alloying Spark plasma sintering |
| url | http://www.degruyter.com/view/j/amm.2017.62.issue-2/amm-2017-0140/amm-2017-0140.xml?format=INT |
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