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Synthesis and Thermoelectric Properties of (La<sub>1z</sub>Nd<sub>z</sub>)<sub>0.8</sub>Fe<sub>4x</sub>Co<sub>x</sub>Sb<sub>12</sub> Skutterudites
Ye-Eun Cha, Il-Ho Kim
Korean J. Met. Mater. 2019;57(6):366-373.   Published online 2019 May 16
DOI: https://doi.org/10.3365/KJMM.2019.57.6.366

p-Type (La1−zNdz)0.8Fe4−xCoxSb12 skutterudites were prepared by partial double filling with La/Nd and charge compensation by substituting Co for Fe. The skutterudite phase was successfully synthesized using encapsulated melting, quenching, annealing and hot-pressing processes, but a small amount of the marcasite phase was identified. Partial filling within the filling fraction limit..... More

Electronic Transport and Thermoelectric Properties of Cu<sub>12-x</sub>Zn<sub>x</sub>Sb<sub>4</sub>S<sub>13</sub> Tetrahedrites Prepared by Mechanical Alloying and Hot Pressing
Sung-Gyu Kwak, Go-Eun Lee, Il-Ho Kim
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

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

Thermoelectric Properties of MnSi1.74-1.75:Ge<i>m</i> Prepared by Solid-State Reaction and Hot Pressing
In-Jae Lee, Sol-Bin Park, Soon-Chul Ur, Kyung-Wook Jang, Il-Ho Kim
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

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

Thermoelectric Properties of P-type (Ce<sub>1-z</sub>Yb<sub>z</sub>)<sub>0.8</sub>Fe<sub>4-x</sub>Co<sub>x</sub>Sb<sub>12</sub> Skutterudites
Deok-Yeong Choi, Ye-Eun Cha, Il-Ho Kim
Korean J. Met. Mater. 2018;56(11):822-828.   Published online 2018 Nov 5
DOI: https://doi.org/10.3365/KJMM.2018.56.11.822

P-type Ce/Yb-filled skutterudites were synthesized, and their charge transport and thermoelectric properties were investigated with partial double filling and charge compensation. In the case of (Ce1-zYbz)0.8Fe4Sb12 without Co substitution, the marcasite (FeSb2) phase formed alongside the skutterudite phase, but the generation of the marcasite phase was inhibited by increasing Co..... More

Charge Transport and Thermoelectric Properties of (La<sub>1z</sub>Pr<sub>z</sub>)<sub>0.8</sub>Fe<sub>4x</sub>Co<sub>x</sub>Sb<sub>12</sub> Skutterudites
Ye-Eun Cha, Il-Ho Kim
Korean J. Met. Mater. 2018;56(10):772-778.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.772

Partially La/Pr-double-filled and Co-substituted (La1−zPrz)0.8Fe4−xCoxSb12 skutterudites were synthesized by encapsulated melting and vacuum hot pressing. (La,Pr)Sb2 phases were not formed because the partial filling did not exceed the filling fraction limit, and the amount of secondary phase FeSb2 also decreased as the Co content increased. Electrical conductivity decreased with increasing..... More

Thermoelectric Properties of Ge-doped Higher Manganese Silicides MnSi<sub>1.72-1.73</sub>:Ge<sub><i>m</i></sub>
Sol-Bin Park, In-Jae Lee, Il-Ho Kim
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

Ge-doped higher manganese silicides (HMSs) MnSi1.72–1.73:Gem (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

                           Cited By 1
Thermoelectric Properties of <i>p</i>-type Polycrystalline Si Prepared by Melt-Spinning Process
용융방사법으로 제작된 p-type 다결정 Si의 열전특성 연구
Ju Hyeong Sun, Young Soo Lim
선주형, 임영수
Korean J. Met. Mater. 2018;56(9):686-692.   Published online 2018 Sep 5
DOI: https://doi.org/10.3365/KJMM.2018.56.9.686

Thermoelectric energy conversion has attracted much attention as an efficient and environment-friendly energy technology. Thermoelectric energy conversion performance is directly influenced by the figure of merit (ZT) of the thermoelectric material, however, most known thermoelectric materials with high ZT contain toxic and/or scarce elements. Herein, we report the thermoelectric properties..... More

Charge Transport and Thermoelectric Properties of N-type Bi<sub>2-x</sub>Sb<sub>x</sub>Te<sub>3-y</sub>Se<sub>y</sub>:I<sub>m</sub> Prepared by Encapsulated Melting and Hot Pressing
Woo-Jin Jung, Hyeok-Jin Kim, Il-Ho Kim
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

Iodine-doped n-type Bi2-xSbxTe3-ySey:Im (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

Effect of Interface Control Using Multiwalled Carbon Nanotubes on the Thermoelectric Properties of TiO<sub>2</sub> Nanocomposites
다중벽 탄소나노튜브를 이용한 계면제어가 TiO2 나노복합체의 열전특성에 미치는 영향
Woo Hyun Nam, Young Soo Lim
남우현, 임영수
Korean J. Met. Mater. 2018;56(7):538-543.   Published online 2018 Jul 5
DOI: https://doi.org/10.3365/KJMM.2018.56.7.538

We report the effect of interface control using multiwalled carbon nanotubes (MWCNT) on thermoelectric properties of TiO2. By consolidating TiO2 nanoparticles with MWCNT (0.5, 1, 2, 4, and 8 wt%) using spark plasma sintering, we prepared interface-controlled TiO2-MWCNT nanocomposites, where TiO2 grains were surrounded with a MWCNT network. Simultaneous control of..... More

Thermoelectric Properties of Cu<sub>1.98</sub>Se Prepared by Melt-spinning Process
용융방사법으로 제작된 Cu1.98Se의 열전특성
Jang-Yeul Tak, Young Soo Lim
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

Cu2Se 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

Thermoelectric Properties of Partially Double-filled (Ce<sub>1-z</sub>Nd<sub>z</sub>)<sub>y</sub>Fe<sub>4-x</sub>Co<sub>x</sub>Sb<sub>12</sub> Skutterudites
Ye-Eun Cha, Il-Ho Kim
Korean J. Met. Mater. 2018;56(6):465-471.   Published online 2018 Jun 4
DOI: https://doi.org/10.3365/KJMM.2018.56.6.465

(Ce1-zNdz)yFe4-xCoxSb12 skutterudites were prepared by encapsulated melting, annealing, and hot pressing. The formation of a marcasite phase (FeSb2) was significantly suppressed by partially filling the voids with Ce/Nd and making a Co substitution at the Fe site. Both the Hall and the Seebeck coefficient values were positive, indicating that all..... More

                           Cited By 3
Effects of Interface Control Using Reduced Graphene Oxide (RGO) on the Thermoelectric Transport Properties of Polycrystalline SnSe Compounds
환원 산화 그래핀을 이용한 계면제어가 다결정 SnSe의 열전 수송특성에 미치는 효과
Sang Tae Lee, Young Soo Lim
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

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

Charge Transport and Thermoelectric Properties of P-type Bi<sub>2-x</sub>Sb<sub>x</sub>Te<sub>3</sub> Prepared by Mechanical Alloying and Hot Pressing
Kyung-Wook Jang, Hyeok-Jin Kim, Woo-Jin Jung, Il-Ho Kim
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

Bi2-xSbxTe3 (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

Effects of Sb on the Charge Transport and Power Factor of Bi<sub>2-x</sub>Sb<sub>x</sub>Te<sub>3</sub> Thermoelectric Compounds Prepared by Hot Pressing
열간 압축 방법으로 제작된 Bi2-xSbxTe3 열전소재 복합체에서 Sb 함량이 전하수송과 출력인자에 미치는 효과
Young Soo Lim, Soonil Lee
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

We report the effects of Sb content on the charge transport and power factor of Bi2-xSbxTe3(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

         Cited By 1
Fabrication and Characterization of Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> Nanowire Arrays and PEDOT: PSS Hybrid Thermoelectric Composites
Ge2Sb2Te5 nanowire arrays와 PEDOT: PSS를 이용한 유・무기 열전 복합소재 합성 및 특성평가
Sang-Hyun Roh, Jiwon Kim, Woon-Ik Park, Yang-Do Kim, Jae-Hong Lim
노상현, 김지원, 박운익, 김양도, 임재홍
Korean J. Met. Mater. 2017;55(6):432-439.   Published online 2017 Jun 1
DOI: https://doi.org/10.3365/KJMM.2017.55.6.432

Hybrid organic/inorganic composites have recently been investigated in the thermoelectric field in an effort to interdependently manipulate the charge carriers, which are interconnected with electrical and thermal transport. The decoupling of a charge carrier’s roles in the hybrid structures can result in enhanced thermoelectric performance, by only exploiting the high..... More

Effects of Cu-doping on the Power Factor of Bi<sub>0.42</sub>Sb<sub>1.58</sub>Te<sub>3</sub> Thermoelectric Compounds Prepared by Hot Pressing
열간 압축 방법으로 제작된 Bi0.42Sb1.58Te3 열전소재 복합체에서 Cu 도핑이 출력인자에 미치는 효과에 대한 연구
Young Soo Lim, Minseok Song, Soonil Lee, Won-Seon Seo
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

We report the effects of incorporated Cu on the thermoelectric transport properties of Bi0.42Sb1.58Te3 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

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