研究者詳細 - 伊藤　孝至

論文 - 伊藤　孝至

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Fabrication of Tilted Mg₂Si/Ni Multilayer Composite Modules Utilizing Polylactic Acid Resin Molds and Evaluation of The Thermoelectric Power Generation Performance 査読有り

Tomohiro KUSUMOTO, Yasuyoshi KUROKAWA, Noritaka USAMI, Takashi ITOH

J. Jpn. Soc. Powder Powder Metallurgy 72 巻 ( Supplement ) 頁： S1269 - S1273 2025年3月

Thermoelectric properties of Mg₂Si thin films prepared by thermal evaporation of Mg and face-to-face annealing 査読有り

Kurokawa, Y; Sato, K; Shibata, K; Kato, S; Miyamoto, S; Gotoh, K; Itoh, T; Usami, N

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING 163 巻頁： 107552 2023年8月

Performance enhancement of droplet-based electricity generator using a CYTOP intermediate layer 査読有り

Wang, HT; Kurokawa, Y; Gotoh, K; Kato, S; Yamada, S; Itoh, T; Usami, N

JAPANESE JOURNAL OF APPLIED PHYSICS 62 巻 ( SC ) 頁： 1 - 6 2023年4月

Morphology and Thermoelectric Properties of Mg_3+δSb₂ Foams Manufactured Using Combustion Synthesis 査読有り

Koga Takashi, Itoh Takashi

MATERIALS TRANSACTIONS 64 巻 ( 4 ) 頁： 835 - 840 2023年4月

Improved conversion efficiency of p-type BaSi₂/n-type crystalline Si heterojunction solar cells by a low growth rate deposition of BaSi₂ 査読有り

Michinobu Fujiwara, Kazuma Takahashi, Yoshihiko Nakagawa, Kazuhiro Gotoh, Takashi Itoh, Yasuyoshi Kurokawa, Noritaka Usami

AIP Advances 12 巻 ( 4 ) 頁： 045115 2022年4月

Fabrication of heterojunction crystalline Si solar cells with BaSi2 thin films prepared by a two-step evaporation method 査読有り

Nakagawa, Y; Takahashi, K; Fujiwara, M; Hara, KO; Gotoh, K; Kurokawa, Y; Itoh, T; Suemasu, T; Usami, N

JAPANESE JOURNAL OF APPLIED PHYSICS 60 巻 ( 10 ) 頁： 105503-1 - 105503-6 2021年10月

燃焼合成を利用して作製したMg_3+δSb₂発泡体の形態と熱電特性査読有り

古賀誉史, 伊藤孝至

粉体および粉末冶金 68 巻 ( 9 ) 頁： 399 - 404 2021年9月

車載用熱電発電材料開発の動向招待有り査読有り

伊藤孝至

システム／制御／情報 65 巻 ( 6 ) 頁： 201 - 206 2021年6月

Quantitative Analysis on Influence of Structural Conditions on Thermoelectric Properties of Tilted Rod-Ni/Mg2Si Composites Based on Finite Element Simulation 査読有り

Itoh, T

MATERIALS TRANSACTIONS 62 巻 ( 2 ) 頁： 246 - 251 2021年

Synthesis of Mg2Si thin film by thermal treatment under inert gas atmosphere and evaluation of film quality 査読有り

Horiba, I; Fujiwara, M; Nakagawa, Y; Gotoh, K; Kurokawa, Y; Itoh, T; Usami, N

JAPANESE JOURNAL OF APPLIED PHYSICS 59 巻頁： SFFB03-1 - SFFB03-5 2020年4月

Optimization of Degreasing-Sintering Process for Mg2Si/PLA Mixture and Influences of Additive Amount of Al on Sintered Density and Thermoelectric Performance of Mg2Si Fabricated by the Optimized Process 査読有り

Itoh, T; Nakano, T

MRS ADVANCES 5 巻 ( 10 ) 頁： 459 - 467 2020年

横方向熱電効果を有する Ni/Mg₂Si複合材料の熱電特性に関する有限要素シミュレーション解析査読有り

伊藤孝至

粉体および粉末冶金 66 巻 ( 2 ) 頁： 80-88 2019年2月

有限要素シミュレーションに基づく傾斜棒状Ni/Mg₂Si複合材料の熱電特性に及ぼす構造条件の影響に関する定量解析査読有り

伊藤孝至

粉体および粉末冶金 65 巻 ( 11 ) 頁： 713-718 2018年11月

Finite Element Simulation on Thermoelectric Performance of Tilted Mg₂Si/Ni Multilayer Composites 査読有り

Takashi Itoh

J. Jpn Soc. Powder and Powder Metallurgy 65 巻 ( 3 ) 頁： 154-157 2018年3月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

Mg₂Si is a promising n-type thermoelectric (TE) material for TE power generation using waste heat with temperature range of 300 to 600^oC. Construction of multilayer composites with Mg₂Si and metallic material brings anisotropy in TE properties and enhancement in mechanical properties. The transverse TE force is created by giving vertical temperature difference in the tilted anisotropic TE material (transverse TE effect). In this study, the tilted Mg₂Si/Ni multilayer composites were focused on, and the influences of the structural conditions on the TE performance were investigated using a finite element simulation (FES). The simulations were carried out using two types of element models of the multilayer composites with different thickness ratio and tilt angle of Mg₂Si layer under the same temperature conditions of 500^oC (hot side) and 100^oC (cold side). The output power of the multilayer composites as a TE performance was calculated from the open-circuit voltage and the internal resistance estimated using FES. The values changed with the thickness ratio and the tilt angle. The optimum structural conditions of thickness ratio and the tilt angle which maximized the output power of the tilted multilayer composites were found out.

DOI： 10.2497/jjspm.65.154

有限要素シミュレーションを用いたMg₂Si/Ni傾斜積層複合材料の熱電特性および性能の解析査読有り

伊藤孝至

粉体および粉末冶金 64 巻 ( 9 ) 頁： 501-509 2017年9月

Influence of Pulverization and CaO Nanoparticles Addition on Thermoelectric Properties and Grain Growth of Mg₂Si Based Compound 査読有り

Takashi Itoh, Akira Tominaga

Materials Transactions 57 巻 ( 7 ) 頁： 1088-1093 2016年7月

Cobalt and Iron Doping Effects on Thermoelectric Properties of Higher Manganese Silicides Prepared by Mechanical Milling and Pulse Discharge Sintering 査読有り

Takashi Itoh, Shinya Uebayashi

J. Jpn Soc. Powder and Powder Metallurgy 63 巻 ( 7 ) 頁： 491-496 2016年7月

Thermoelectric Properties of Al-doped Mg₂Si Compounds Prepared via Three Kinds of Process for Grain Refinement 査読有り

Takashi Itoh, Akira Tominaga

MRS Advances 1 巻 ( Issue 60 ) 頁： 3989 - 3995 2016年5月

Thermoelectric Properties of Crystal Aligned Higher Manganese Silicide Fabricated by Solidification under Magnetic Field 査読有り

Kazushige Yamauchi, Takeshi Hagio, Tomoya Mitsuo, Kazuhiko Iwai, Takashi Itoh

Japanese Journal of Applied Physics 54 巻 ( 11 ) 頁： 117102-1-6 2015年10月

記述言語：英語掲載種別：研究論文（学術雑誌）

MnSi_1.73 is a promising p-type thermoelectric material for use in the intermediate-temperature region owing to its high oxidation resistance. Its thermoelectric properties are highly dependent on crystallographic direction and control of crystal alignment is thus important for polycrystalline MnSi_1.73. On the other hand, solidification under magnetic fields has been reported to directly yield crystal aligned structures in various alloys. Here, a 3T magnetic field was imposed during solidification of MnSi_1.73 for the first time. X-ray diffraction analysis indicated that polycrystalline MnSi_1.73 with c-axes aligned perpendicularly to the magnetic field was successfully obtained. The Seebeck coefficient slightly decreased while the electrical conductivity increased more than twofold along the magnetic field direction compared with those of the sample solidified without the magnetic field, which reflected the trend of a single crystal. The power factor reached a maximum of 2.09×10^-4 W m^-1K^-2 at 771 K; however, this was about one-fifth of that of a single crystal. Improvement in electrical conductivity by prevention of crack formation shall realize high performance expected from the crystal aligned structure.

DOI： 10.7567/JJAP.54.117102

Mg₂Si系化合物の熱電特性と粒成長に及ぼす粉砕とCaOナノ粒子添加の影響査読有り

伊藤孝至, 富永　彰

粉体および粉末冶金 62 巻 ( 3 ) 頁： 114-119 2015年3月

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