Synthesis of Uniformly Sized Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> Nanoparticles via Mechanochemical Process and Wet-Milling for Reduced Thermal Conductivity
In this study, Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> (BST) nanoparticles (NPs) with high crystallinities were synthesized via a mechanochemical process (MCP). X-ray diffraction (XRD), and Raman and X-ray photoelectron spectroscopy (XPS) spectra of the B...
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doaj-b427fa8c258b433cbac89bf343372efd2021-01-23T00:04:56ZengMDPI AGMaterials1996-19442021-01-011453653610.3390/ma14030536Synthesis of Uniformly Sized Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> Nanoparticles via Mechanochemical Process and Wet-Milling for Reduced Thermal ConductivityBo-In Park0Miri Shin1Jaeho Park2Jae-Seung Lee3Seung Yong Lee4Seunggun Yu5Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, KoreaMaterials Architecturing Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, KoreaDepartment of Materials Science and Engineering, Seoul National University, Seoul 08826, KoreaDepartment of Materials Science and Engineering, Korea University, Seoul 02841, KoreaMaterials Architecturing Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, KoreaInsulation Materials Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 51543, KoreaIn this study, Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> (BST) nanoparticles (NPs) with high crystallinities were synthesized via a mechanochemical process (MCP). X-ray diffraction (XRD), and Raman and X-ray photoelectron spectroscopy (XPS) spectra of the BST NPs showed that the Bi, Sb, and Te powders successfully formed BiSbTe phase and transmission electron microscopy (TEM) images, verifying the high crystallinity and smaller size, albeit agglomerated. The as-synthesized BST NPs with agglomerated clusters were ground into smaller sizes of approximately 41.8 nm with uniform distribution through a simple wet-milling process during 7 days. The thermal conduction behaviors of bulk alloys fabricated by spark plasma sintering (SPS) of the BST NPs were studied by comparing those of samples fabricated from as-synthesized BST NPs and a BST ingot. The thermal conductivities (<i>κ</i>) of the BST nanocomposites were significantly reduced by introducing BST NPs with smaller grain sizes and finer distributions in the temperature range from 300 to 500 K. The BST nanocomposites fabricated from wet-milled BST NPs offered ultralow <i>κ</i> values of 0.84 W m<sup>−1</sup> K<sup>−1</sup> at approximately 398 K.https://www.mdpi.com/1996-1944/14/3/536BSTnanoparticlesthermal conductivitymechanochemical processwet-milling |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bo-In Park Miri Shin Jaeho Park Jae-Seung Lee Seung Yong Lee Seunggun Yu |
spellingShingle |
Bo-In Park Miri Shin Jaeho Park Jae-Seung Lee Seung Yong Lee Seunggun Yu Synthesis of Uniformly Sized Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> Nanoparticles via Mechanochemical Process and Wet-Milling for Reduced Thermal Conductivity Materials BST nanoparticles thermal conductivity mechanochemical process wet-milling |
author_facet |
Bo-In Park Miri Shin Jaeho Park Jae-Seung Lee Seung Yong Lee Seunggun Yu |
author_sort |
Bo-In Park |
title |
Synthesis of Uniformly Sized Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> Nanoparticles via Mechanochemical Process and Wet-Milling for Reduced Thermal Conductivity |
title_short |
Synthesis of Uniformly Sized Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> Nanoparticles via Mechanochemical Process and Wet-Milling for Reduced Thermal Conductivity |
title_full |
Synthesis of Uniformly Sized Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> Nanoparticles via Mechanochemical Process and Wet-Milling for Reduced Thermal Conductivity |
title_fullStr |
Synthesis of Uniformly Sized Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> Nanoparticles via Mechanochemical Process and Wet-Milling for Reduced Thermal Conductivity |
title_full_unstemmed |
Synthesis of Uniformly Sized Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> Nanoparticles via Mechanochemical Process and Wet-Milling for Reduced Thermal Conductivity |
title_sort |
synthesis of uniformly sized bi<sub>0.5</sub>sb<sub>1.5</sub>te<sub>3.0</sub> nanoparticles via mechanochemical process and wet-milling for reduced thermal conductivity |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2021-01-01 |
description |
In this study, Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3.0</sub> (BST) nanoparticles (NPs) with high crystallinities were synthesized via a mechanochemical process (MCP). X-ray diffraction (XRD), and Raman and X-ray photoelectron spectroscopy (XPS) spectra of the BST NPs showed that the Bi, Sb, and Te powders successfully formed BiSbTe phase and transmission electron microscopy (TEM) images, verifying the high crystallinity and smaller size, albeit agglomerated. The as-synthesized BST NPs with agglomerated clusters were ground into smaller sizes of approximately 41.8 nm with uniform distribution through a simple wet-milling process during 7 days. The thermal conduction behaviors of bulk alloys fabricated by spark plasma sintering (SPS) of the BST NPs were studied by comparing those of samples fabricated from as-synthesized BST NPs and a BST ingot. The thermal conductivities (<i>κ</i>) of the BST nanocomposites were significantly reduced by introducing BST NPs with smaller grain sizes and finer distributions in the temperature range from 300 to 500 K. The BST nanocomposites fabricated from wet-milled BST NPs offered ultralow <i>κ</i> values of 0.84 W m<sup>−1</sup> K<sup>−1</sup> at approximately 398 K. |
topic |
BST nanoparticles thermal conductivity mechanochemical process wet-milling |
url |
https://www.mdpi.com/1996-1944/14/3/536 |
work_keys_str_mv |
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