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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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Korean J. Met. Mater.
2023;61(6):422-430. Published online 2023 May 18
DOI:
https://doi.org/10.3365/KJMM.2023.61.6.422
Abstract
Cu–Sb–Se ternary chalcogenide compounds composed of earth-abundant low-toxicity elements are attracting attention as economical and ecofriendly semiconductors. Among them, permingeatite (Cu
3
SbSe
4
) is a potential thermoelectric material with high Seebeck coefficient and low lattice thermal conductivity. However, it is necessary to improve its thermoelectric properties through doping, as it has low.....
More
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Korean J. Met. Mater.
2023;61(5):363-370. Published online 2023 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2023.61.5.363
Abstract
Bytizite (Cu
3
SbSe
3
) has attracted interest as a promising thermoelectric material because of its ultralow thermal conductivity; however, there are few experimental studies. This study investigated the optimal processing conditions for the synthesis of Cu
3
SbSe
3
using mechanical alloying (MA) and hot pressing (HP). The MA powder exhibited an orthorhombic Cu
3
SbSe
3
.....
More
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Korean J. Met. Mater.
2023;61(5):355-362. Published online 2023 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2023.61.5.355
Abstract
Famatinite (Cu
3
SbS
4
) is a promising p-type thermoelectric material because of its low lattice thermal conductivity and high Seebeck coefficient. In this study, famatinite powders, double-doped with Sn (a B
IV
group element) and In (a B
III
group element) to give Cu
3
Sb
1-x-y
Sn
x
In
y
S
4
(0.02 ≤ x ≤ 0.12 and 0.06 ≤.....
More
Web of Science 1
Crossref 2
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Korean J. Met. Mater.
2023;61(4):277-283. Published online 2023 Mar 22
DOI:
https://doi.org/10.3365/KJMM.2023.61.4.277
Abstract
Skinnerite (Cu
3
SbS
3
) has recently attracted attention as a promising thermoelectric material because of its low thermal conductivity. In this study, we performed the solid-state synthesis of Fe-doped skinnerite Cu
3
Sb
1-y
Fe
y
S
3
(y = 0.02−0.06) using mechanical alloying and hot pressing, and examined the samples’ thermoelectric properties relative to Fe doping content. All.....
More
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Korean J. Met. Mater.
2023;61(4):269-276. Published online 2023 Mar 22
DOI:
https://doi.org/10.3365/KJMM.2023.61.4.269
Abstract
Permingeatite (Cu
3
SbSe
4
) is a promising thermoelectric material with narrow bandgap energy and large carrier effective mass. However, doping is required to improve its electrical conductivity and thermoelectric properties. In this study, Cu
3
Sb
1−y
(Al/In)
y
Se
4
doped with B
III
-group elements (Al or In) at the Sb sites was synthesized using mechanical alloying followed by.....
More
Web of Science 1
Crossref 1
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Korean J. Met. Mater.
2022;60(8):593-600. Published online 2022 Jul 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.8.593
Abstract
In this study, mechanical alloying was performed to synthesize permingeatite Cu
3
Sb
1-x-y
Sn
x
Bi
y
Se
4
(0.02 ≤ x ≤ 0.06 and 0.02 ≤ y ≤ 0.04) doped with Sn and Bi. Hot pressing was subsequently conducted to achieve dense sintered bodies. When the Bi content was constant, the carrier concentration increased with the Sn.....
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Web of Science 3
Crossref 3
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Korean J. Met. Mater.
2022;60(6):455-462. Published online 2022 May 24
DOI:
https://doi.org/10.3365/KJMM.2022.60.6.455
Abstract
Skinnerite Cu
3
SbS
3
, which consists of non-toxic and low-cost elements, is a potential thermoelectric material, however, studies on its thermoelectric properties are limited. In this study, the optimal conditions of mechanical alloying (MA) and hot pressing (HP) for the synthesis of the Cu
3
SbS
3
phase were investigated, and its thermoelectric properties were.....
More
Web of Science 5
Crossref 5
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Korean J. Met. Mater.
2022;60(6):440-447. Published online 2022 May 24
DOI:
https://doi.org/10.3365/KJMM.2022.60.6.440
Abstract
Si-doped Cu
12
Sb
4-y
Si
y
S
13
(y = 0.1-0.4) compounds were prepared using solid-state synthesis. Each specimen consisted of a single tetrahedrite phase with a densely sintered body whose relative density exceeded 98.9%. The lattice constant decreased from 1.0357 nm to 1.0336 nm as the Si content increased. When the Si doping content (y).....
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Korean J. Met. Mater.
2022;60(5):376-383. Published online 2022 Apr 22
DOI:
https://doi.org/10.3365/KJMM.2022.60.5.376
Abstract
Ge-doped tetrahedrites Cu
12
Sb
4-y
Ge
y
S
13
(
y
= 0.1–0.4) were prepared using mechanical alloying and hot pressing. An X-ray diffraction analysis after mechanical alloying showed a single tetrahedrite phase without secondary phases. The tetrahedrite phase was stable after hot pressing at 723 K under 70 MPa. As the Ge content increased, the lattice.....
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Korean J. Met. Mater.
2021;59(10):724-731. Published online 2021 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.10.724
Abstract
In this study, tetrahedrite compounds doped with Sn were prepared by mechanical alloying and hot pressing, and their charge transport and thermoelectric properties were analyzed. X-ray diffraction analysis revealed that both the synthetic powders and sintered bodies were synthesized as a single tetrahedrite phase without secondary phases. Densely sintered specimens.....
More
Crossref 4
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Korean J. Met. Mater.
2021;59(8):560-566. Published online 2021 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.8.560
Abstract
Tetrahedrite is a promising thermoelectric material mainly due to its low thermal conductivity, a consequence of its complicated crystal structure. However, tetrahedrite has a high hole concentration; therefore, optimizing carrier concentration through doping is required to maximize the power factor. In this study, Te-doped tetrahedrites Cu
12
Sb
4-y
Te
y
S
13
(0.1 ≤ y ≤.....
More
Crossref 1
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Korean J. Met. Mater.
2021;59(6):422-429. Published online 2021 May 26
DOI:
https://doi.org/10.3365/KJMM.2021.59.6.422
Abstract
Permingeatites Cu
3
Sb
1−y
Ge
y
Se
4
(0 ≤ y ≤ 0.14) were synthesized by mechanical alloying and hot pressing. The charge-transport parameters (Hall coefficient, carrier concentration, mobility, and Lorenz number) and thermoelectric properties (electrical conductivity, Seebeck coefficient, power factor, thermal conductivity, and figure of merit) were examined with respect to the Ge doping level......
More
Web of Science 8
Crossref 6
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Korean J. Met. Mater.
2021;59(5):329-335. Published online 2021 Apr 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.5.329
Abstract
Mn-doped tetrahedrites Cu
12-x
Mn
x
Sb
4
S
13
(0.1 ≤ x ≤ 0.4) were synthesized by mechanical alloying (MA) and sintered by hot pressing (HP). A single tetrahedrite phase was synthesized by MA without post-annealing, and it was stable without any phase changes after HP. The hot-pressed specimens had a relative density higher than 98.6%......
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Web of Science 1
Crossref 1
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Korean J. Met. Mater.
2020;58(5):340-347. Published online 2020 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2020.58.5.340
Abstract
Tetrahedrite (C
12
Sb
4
S
13
) has attracted attention as a p-type thermoeletric material with very low thermal conductivity induced by the anharmonic oscillation of Cu due to the lone-pair electrons of Sb. Many studies have been conducted to improve its thermoelectric performance by partially substituting the transition elements for the Cu sites. In.....
More
Web of Science 9
Crossref 10
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Korean J. Met. Mater.
2020;58(4):272-277. Published online 2020 Mar 9
DOI:
https://doi.org/10.3365/KJMM.2020.58.4.272
Abstract
Tetrahedrite has low lattice thermal conductivity because of the lone-pair electrons of Sb, which cause the Cu atoms to vibrate at a low frequency and high amplitude. The synthesis of tetrahedrite compounds by conventional melting methods requires a long-time reaction and annealing. However, a homogeneous and solid-state synthesis can be.....
More
Web of Science 18
Crossref 18
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Korean J. Met. Mater.
2019;57(5):328-333. Published online 2019 Apr 10
DOI:
https://doi.org/10.3365/KJMM.2019.57.5.328
Abstract
Tetrahedrite Cu12Sb4S13 has low lattice thermal conductivity because of the lone-pair electrons of Sb, which cause the Cu atoms to vibrate at a low frequency and high amplitude. When the Cu atoms of Cu12Sb4S13 are partially substituted with a transition metal, changes in the Cu vibrations can intensify phonon scattering,.....
More
Web of Science 8
Crossref 6
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Korean J. Met. Mater.
2019;57(4):264-269. Published online 2019 Apr 5
DOI:
https://doi.org/10.3365/KJMM.2019.57.4.264
Abstract
Higher manganese silicides (HMSs) MnSi1.74-1.75:Gem (m = 0.01–0.04) were prepared by solid-state reaction and hot pressing. The major phases of the HMSs were Mn27Si47 or Mn4Si7, and a small quantity of Si remained, but the intermetallic compound MnSi was not formed. The lattice constant increased with the substitution of Ge.....
More
Web of Science 3
Crossref 3
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Korean J. Met. Mater.
2018;56(9):693-698. Published online 2018 Sep 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.9.693
Abstract
Ge-doped higher manganese silicides (HMSs) MnSi
1.72–1.73
:Ge
m
(
m
= 0.01-0.04) were prepared and their thermoelectric properties were studied. HMS powders were synthesized by solid-state reaction of raw material powders (Mn, Si, and Ge) at 1273 K for 6 h in vacuum, and hot-pressed at 1173 K for 2 h under 70.....
More
Crossref 5
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Korean J. Met. Mater.
2018;56(7):544-550. Published online 2018 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.7.544
Abstract
Iodine-doped n-type Bi
2-x
Sb
x
Te
3-y
Se
y
:I
m
(x = 0.1–0.2, y = 0.15–0.6, and m = 0.0025–0.005) quaternary solid solutions were prepared by encapsulated melting (EM) and hot pressing (HP). The lattice constants of the resulting materials decreased with increasing Sb and Se contents, whereas the amount of I dopant was too small to.....
More
Crossref 8
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용융방사법으로 제작된 Cu
1.98
Se의 열전특성
J
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탁장렬, 임영수
Korean J. Met. Mater.
2018;56(7):532-537. Published online 2018 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.7.532
Abstract
Cu
2
Se exhibits very low thermal conductivity and the origin is known to be the "liquid-like" behavior of Cu ions around the sub-lattice of Se. Due to its very high
ZT
, research interest in the thermoelectric properties of this material has been increasing rapidly. However, most studies have used a conventional melting.....
More
Crossref 1
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환원 산화 그래핀을 이용한 계면제어가 다결정 SnSe의 열전 수송특성에 미치는 효과
S
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이상태, 임영수
Korean J. Met. Mater.
2018;56(2):163-169. Published online 2018 Feb 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.2.163
Abstract
We report the effects of interface control using reduced graphene oxide (RGO) on the thermoelectric transport properties of polycrystalline SnSe compounds. Polycrystalline SnSe-RGO composites were prepared by the consolidation of SnSe powder coated with the RGO by hot pressing, and the RGO content was controlled to be 0, 0.2, 0.5.....
More
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Korean J. Met. Mater.
2018;56(1):66-71. Published online 2018 Jan 1
DOI:
https://doi.org/10.3365/KJMM.2018.56.1.66
Abstract
Bi
2-x
Sb
x
Te
3
(x = 1.4–1.7) solid solutions were synthesized by mechanical alloying (MA) and consolidated by hot pressing (HP), and their charge transport and thermoelectric properties were examined. The relative densities of the hot-pressed specimens were higher than 96% on average. As the Sb content was increased, the lattice constants decreased,.....
More
Crossref 5
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열간 압축 방법으로 제작된 Bi
2-x
Sb
x
Te
3
열전소재 복합체에서 Sb 함량이 전하수송과 출력인자에 미치는 효과
Y
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임영수, 이순일
Korean J. Met. Mater.
2017;55(9):651-656. Published online 2017 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2017.55.9.651
Abstract
We report the effects of Sb content on the charge transport and power factor of Bi
2-x
Sb
x
Te
3
(1.56 ≤
χ
≤ 1.74) compounds prepared by hot pressing. From the temperature-dependence of the electrical conductivity, it was found that the charge transport in the compounds was predominantly governed by acoustic phonon scattering, and additionally affected.....
More
Crossref 3
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열간 압축 방법으로 제작된 Bi
0.42
Sb
1.58
Te
3
열전소재 복합체에서 Cu 도핑이 출력인자에 미치는 효과에 대한 연구
Y
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임영수, 송민석, 이순일, 서원선
Korean J. Met. Mater.
2017;55(6):427-431. Published online 2017 Jun 1
DOI:
https://doi.org/10.3365/KJMM.2017.55.6.427
Abstract
We report the effects of incorporated Cu on the thermoelectric transport properties of Bi
0.42
Sb
1.58
Te
3
compounds prepared by the hot pressing method. The hole concentration in the compound increased significantly with the increase in the Cu content. The acceptor role of Cu was manifested by Hall measurements and also by the.....
More
Crossref 4
1
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Journal Impact Factor 1.1