Thermoelectric Properties of Silicon Germanium Alloy Nanocomposite Fabricated by Mechanical Alloying and Spark Plasma Sintering

Zhen Ye Zhu; Shi Lei Guo

doi:10.4028/www.scientific.net/KEM.703.70

Paper Titles

Predicting Edge Cracks on Shear-Cut High-Strength Steels by Modified Uniaxial Tensile Tests
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Analysis on Phases and Grain Evolution of TC4 Ti-Alloy in Hot Forming in Time and Space Based on Deform-3D
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Effects of Heat Treatment on Microstructure and Properties of Stainless Clad Plate
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The Influence of Graphite Heat Conductor Technology on the Preparation and Crystal Structure of Single Crystal Blade
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Thermoelectric Properties of Silicon Germanium Alloy Nanocomposite Fabricated by Mechanical Alloying and Spark Plasma Sintering
p.70

Advance of Sintering Methods of High Purity Alumina Ceramics
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Phase Field Simulation of the Lamellar Microstructure Formation in TiAl Alloys
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Toughening Effects of Carbon Nanotubes on 3Y-ZrO₂ via Different Material Molding Technologies
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Effect of Preheating Temperature on Microstructure of Fe Based Alloy Coating by Laser Direct Metal Deposition
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 703Thermoelectric Properties of Silicon Germanium...

Thermoelectric Properties of Silicon Germanium Alloy Nanocomposite Fabricated by Mechanical Alloying and Spark Plasma Sintering

Abstract:

High dense p-type Si₉₅Ge₅ doped with nanoSi₇₀Ge₃₀B₅particles thermoelectric materials were firstly fabricated by mechanical alloying (MA) and spark plasma sintering (SPS) method. The effects of different nanoSi₇₀Ge₃₀B₅ doping content on the thermoelectric and phase properties were studied. A dimensionless thermoelectric figure-of-merit (ZT) of 0.47 at 710K in p-type nanocomposite bulk silicon germanium (SiGe) alloys is achieved. The enhancement of ZT is due to a large reduction of thermal conductivity caused by the increased grain boundaries of the numerous nanograins that effectively scatter long wavelength phonons.

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Periodical:

Key Engineering Materials (Volume 703)

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70-75

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.703.70

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Online since:

August 2016

Authors:

Zhen Ye Zhu*, Shi Lei Guo

Keywords:

Mechanical Alloying, SiGe, Spark Plasma Sintering, Thermoelectric Properties

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