Search Results - "Takagiwa, Yoshiki"

Thermoelectric Properties of Co-Substituted Al–Pd–Re Icosahedral Quasicrystals by Takagiwa, Yoshiki

“…The practical application of quasicrystals (QCs) as thermoelectric materials makes icosahedral (i-) Al–Pd–Re QC attractive because of its moderate electrical…”
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Improvement of the Thermoelectric Performance of Pseudogap and Narrow-Gap Compounds via Theoretical Calculations by Takagiwa, Yoshiki

“…This review briefly discusses the relationship between the crystal structures, electronic structures, and thermoelectric properties of materials such as…”
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A practical appraisal of thermoelectric materials for use in an autonomous power supply by Takagiwa, Yoshiki, Shinohara, Yoshikazu

“…We discuss the selection of thermoelectric materials for use in autonomous power supplies for future sensing networks in terms of cost payback time and…”
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Machine-Learning-Assisted Development and Theoretical Consideration for the Al2Fe3Si3 Thermoelectric Material by Hou, Zhufeng, Takagiwa, Yoshiki, Shinohara, Yoshikazu, Xu, Yibin, Tsuda, Koji

“…Chemical composition alteration is a general strategy to optimize the thermoelectric properties of a thermoelectric material to achieve high-efficiency…”
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Reinvestigation of the Thermoelectric Properties of Fe‐Substituted Icosahedral Al–Pd–Re Quasicrystals by Takagiwa, Yoshiki, Kimura, Kaoru

“…Icosahedral quasicrystals (QCs) have a glass‐like, low thermal conductivity because of their complex crystal structures, and a moderate power factor because of…”
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Na Doping in PbTe: Solubility, Band Convergence, Phase Boundary Mapping, and Thermoelectric Properties by Jood, Priyanka, Male, James P, Anand, Shashwat, Matsushita, Yoshitaka, Takagiwa, Yoshiki, Kanatzidis, Mercouri G, Snyder, G. Jeffrey, Ohta, Michihiro

“…Many monumental breakthroughs in p-type PbTe thermoelectrics are driven by optimizing a Pb0.98Na0.02Te matrix. However, recent works found that x > 0.02 in…”
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Earth-Abundant Fe–Al–Si Thermoelectric (FAST) Materials: from Fundamental Materials Research to Module Development by Takagiwa, Yoshiki, Ikeda, Teruyuki, Kojima, Hiroyasu

“…To develop an autonomous power generation technology to support an internet-of-things (IoT) society, we proposed low-cost and nontoxic Fe–Al–Si-based…”
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High-Temperature Atomic Diffusion and Specific Heat in Quasicrystals by Nagai, Yuki, Iwasaki, Yutaka, Kitahara, Koichi, Takagiwa, Yoshiki, Kimura, Kaoru, Shiga, Motoyuki

“…A quasicrystal is an ordered but nonperiodic structure understood as a projection from a higher-dimensional periodic structure. Some physical properties of…”
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Fe–Al–Si Thermoelectric (FAST) Materials and Modules: Diffusion Couple and Machine-Learning-Assisted Materials Development by Takagiwa, Yoshiki, Hou, Zhufeng, Tsuda, Koji, Ikeda, Teruyuki, Kojima, Hiroyasu

“…To lower the introduction and maintenance costs of autonomous power supplies for driving Internet-of-things (IoT) devices, we have developed low-cost…”
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Thermoelectric Properties of Quasicrystalline Approximant in Al–Cu–Ir System by Kitahara, Koichi, Takagiwa, Yoshiki, Kimura, Kaoru

“…The thermoelectric properties of a cubic quasicrystalline approximant in the Al–Cu–Ir system were investigated experimentally and theoretically. A homogeneous…”
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Metallic-covalent bonding conversion and thermoelectric properties of Al-based icosahedral quasicrystals and approximants by Takagiwa, Yoshiki, Kimura, Kaoru

“…In this article, we review the characteristic features of icosahedral cluster solids, metallic-covalent bonding conversion (MCBC), and the thermoelectric…”
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High-Temperature Specific Heat of Al–Cu–Ru Icosahedral Quasicrystals and 1/1 Crystal Approximants by Tamura, Satoshi, Fukushima, Kento, Tokumoto, Yuki, Takagiwa, Yoshiki, Edagawa, Keiichi

“…We report the results of specific heat measurements for Al–Cu–Ru icosahedral quasicrystals (i-QCs) and 1/1 crystal approximants (1/1-CAs) in the temperature…”
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Conduction type control and power factor enhancement of the thermoelectric material Al2Fe3Si3 by Takagiwa, Yoshiki, Isoda, Yukihiro, Goto, Masahiro, Shinohara, Yoshikazu

“…Control of the conduction type of a target thermoelectric material is necessary to fabricate power generation modules. When developing thermoelectric modules…”
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First-Principles Study on Lattice Dynamics and Thermal Conductivity of Thermoelectric Intermetallics Fe3Al2Si3 by Sato, Naoki, Takagiwa, Yoshiki

“…Thermoelectric materials have been expected as a critical underlying technology for developing an autonomous power generation system driven at near room…”
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Semimetallic Band Structure and Cluster-Based Description of a Cubic Quasicrystalline Approximant in the Al–Cu–Ir System by Kitahara, Koichi, Takagiwa, Yoshiki, Kimura, Kaoru

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Reduction of Thermal Conductivity for Icosahedral Al-Cu-Fe Quasicrystal through Heavy Element Substitution by Takagiwa, Yoshiki, Maeda, Ryota, Ohhashi, Satoshi, Tsai, An-Pang

“…Icosahedral Al-Cu-Fe quasicrystal (QC) shows moderate electrical conductivity and low thermal conductivity, and both p- and n-type conduction can be controlled…”
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Effect of Anomalous Crystal Structure of Iron Aluminides Fe2Al5 and Fe4Al13: Low Phonon Thermal Conductivity and Potentiality as Thermoelectric Materials by Tobita, Kazuki, Sato, Naoki, Kitahara, Koichi, Takagiwa, Yoshiki, Kimura, Kaoru

“…Iron Aluminide Fe2Al5 has a rigid framework of both fully occupied aluminum and iron sites and channels of partially occupied aluminum sites. On the other…”
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Comparative study of high-temperature specific heat for Al–Pd–Mn icosahedral quasicrystals and crystal approximants by Fukushima, Kento, Suyama, Hiroki, Tokumoto, Yuki, Kamimura, Yasushi, Takagiwa, Yoshiki, Edagawa, Keiichi

“…Abstract Quasicrystals (QCs) have a peculiar structural order characterized by quasiperiodicity and non-crystallographical point group symmetry. To reveal…”
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Effect of carrier doping on the electronic states of earth-abundant Fe–Al–Si thermoelectric materials by Tsuda, Shunsuke, Yoshinari, Asako, Takezawa, Shingo, Ohishi, Kenta, Nagamura, Naoka, Zhang, Wenxiong, Iwasaki, Yutaka, Takagiwa, Yoshiki

“…Abstract Fe–Al–Si-based thermoelectric (FAST) materials are non-toxic and low-cost materials that can be used for autonomous power supplies to drive…”
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Activated Reactive Consolidation Method as a New Approach to Enhanced Thermoelectric Properties of n‑Type Nanostructured Mg2Si by Alinejad, Babak, Takagiwa, Yoshiki, Ikeda, Teruyuki

“…The activated reactive consolidation method was implemented to enhance the thermoelectric properties of n-type Mg2Si binary components. This method consists of…”
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