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

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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Main Authors: Bo-In Park, Miri Shin, Jaeho Park, Jae-Seung Lee, Seung Yong Lee, Seunggun Yu
Format: Article
Language:English
Published: MDPI AG 2021-01-01
Series:Materials
Subjects:
BST
nanoparticles
thermal conductivity
mechanochemical process
wet-milling
Online Access:https://www.mdpi.com/1996-1944/14/3/536
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spelling 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
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