研究者詳細 - 伊藤　孝至

論文 - 伊藤　孝至

分割表示 154 件中 41 - 60 件目／全件表示 >>

Synthesis of β-Zn₄Sb₃ Thermoelectric Nanoparticles by Reaction of Synthesized Sb Nanoparticles and Molten Zn 査読有り

T. Maruyama, T. Itoh

Proc. International Symposium on EcoTopia Science 2011 頁： 234 2011年12月

Synthesis of Higher Manganese Silicide and It's Thermoelectric Property 査読有り

N. Ono, T. Itoh

Proc. International Symposium on Materials Science and Innovation for Sustainable Society 2 巻頁： 11-12 2011年11月

Thermoelectric Properties and Durability of Mg₂Si-Based Compounds Synthesized Using Magnesium Alloy 査読有り

K. Hagio, T. Itoh

Proc. International Symposium on Materials Science and Innovation for Sustainable Society 2 巻頁： 13-14 2011年11月

Thermoelectric Properties of n-type La-Mg Double Filled CoSb₃ Compounds Synthesized by MA-PDS 査読有り

T. Maruyama, T. Itoh

Proc. International Symposium on Materials Science and Innovation for Sustainable Society 2 巻頁： 15-16 2011年11月

Thermoelectric Properties of Mg₂Si-based Compounds Synthesized Partially Using Magnesium Alloy 査読有り

T. Itoh, K. Hagio

Proc. 9th European Conference on Thermoelectrics 頁： CD-ROM B_39_P 2011年9月

Development of Thermal Rectifier Usable at High Temperature 査読有り

T. Takeuchi, H. Goto, Y. Toyama, T. Itoh, M. Mikami

J. Electronic Materials 40 巻 ( 5 ) 頁： 1129-1135 2011年5月

Thermoelectric Properties of Carbon Nanotubes Added n-type CoSb₃ Compound 査読有り

T. Itoh, M. Tachikawa

Mater. Res. Soc. Symp. Proc. 1314 巻 2011年5月

Synthesis of Bi₂Te₃ Nanosheets using Polyol Process 査読有り

S. Nishiwaki, T. Itoh

IOP Conference Series: Materials Science and Engineering 18 巻 2011年1月

Thermoelectric Properties of Carbon Nanotubes Added n-type CoSb₃ Compound

T. Itoh and M. Tachikawa

2010 MRS Fall Meeting Abstracts 頁： CD-ROM ID:911936 2010年12月

Fabrication and Thermoelectric Properties of Eco-Friendly Silicides for Thermoelectric Power Generation Using Waste Heat 査読有り

T. Itoh

Transactions of JWRI 39 巻 ( 2 ) 頁： 276-278 2010年12月

Synthesis of Bi₂Te₃ Nanosheets Using Polyol Process 査読有り

S. Nishiwaki and T. Itoh

3rd International Congress on Ceramics Abstracts 頁： CD-ROM, S9C-P019 2010年11月

Fabrication and Thermoelectric Properties of Eco-Friendly Silicides for Thermoelectric Power Generation Using Waste Heat 査読有り

T. Itoh

The International Symposium on Advanced Materials Development and Integration of Novel Structured Metallic and Inorganic Materials Proc. 頁： 283-284 2010年11月

Effect of Silicon Content on Thermoelectric Properties of Higher Manganese Silicide Compounds Prepared by Mechanical Grinding and Pulse Discharge Sintering

T. Itoh and M. Yoshikura

29th International Conference on Thermoelectric Abstracts 頁： 165 2010年6月

Synthesis of Thermoelectric Bi-Sb Alloy by Liquid-Solid Phase Reaction Method 査読有り

S. Nishiwaki and T. Itoh

29th International Conference on Thermoelectric Abstracts 頁： 191 2010年6月

ＭＧ－ＰＤＳ法で合成した高マンガンシリサイド化合物の熱電特性査読有り

吉倉雅晶，伊藤孝至

粉体および粉末冶金 57 巻 ( 4 ) 頁： 242-246 2010年4月

修正ポリオールプロセスによる熱電Bi-Sb合金のナノ粒子合成査読有り

田中裕介,　伊藤孝至

粉体および粉末冶金 57 巻 ( 4 ) 頁： 252-256 2010年4月

パルス放電焼結法によって作製したn型CoSb₃化合物の熱電特性に及ぼすアルミナナノ粒子添加の影響査読有り

太刀川雅史，伊藤孝至

高温学会誌 36 巻 ( 2 ) 頁： 85-89 2010年3月

Development of Materials and Modules for Thermoelectric Power Generation Recovering Waste Heat 招待有り

T. Itoh

Abstracts of The 15th ATA Symposium (International Green Energy Conference) 頁： L-06 2009年11月

担当区分：筆頭著者記述言語：英語

The waste heat with intermediate temperature (300-600 oC) is discharged from many kinds of combustion systems, and the thermoelectric power generation is the most effective means for its recovery. Thus, the developments of the thermoelectric materials and modules working effectively in this temperature range are required. We developed the thermoelectric materials and modules for the thermoelectric power generation recovering the waste heat

Syntheses of Ni-doped and Fe-doped CoSb₃ Thermoelectric Nanoparticles through Modified Polyol Process 査読有り

T. Itoh and K. Isogai

Mater. Res. Soc. Symp. Proc. 1166 巻頁： 135-140 2009年11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）

Skutterudite CoSb₃ compounds are of increasing interest as materials with good thermoelectric performance over the temperature range of 600 to 800 K, but the thermal conductivity of the materials is relatively high. Nanostructured materials have been shown to enhance phonon scattering and lower the thermal conductivity of the thermoelectric materials. Partial substitution of Ni or Fe on the Co site of CoSb₃ is a hopeful route for improving thermoelectric performance of the CoSb₃ compounds. In the present work, synthesis of Ni-doped and Fe-doped CoSb₃ nanoparticles through the modified polyol process was attempted and the optimum synthesizing condition was investigated. Co(OOCH₃)₂·4H₂O, Ni(OOCH₃)₂·4H₂O, FeCl₃·6H₂O and SbCl₃, were prepared as precursors. The precursors were reduced by NaBH₄ in tetraethyleneglycol at 513 K in an argon atmosphere, for different reaction times (holding times). The reaction products were characterized by the X-ray diffraction, the energy dispersive X-ray spectroscopy, and transmission electron microscopy. The nanoparticles with about 20 to 30 nm in size mainly existed in the reaction products regardless of the chemical composition and the reaction time. The skutterudite phase was identified as a main phase in the sample synthesized for long reaction time, but the other phases of Sb and MSb₂ (M=Co, Ni, Fe) were also detected. The lattice parameter of the synthesized skutterudite phase linearly increased with increasing the doping agent concentration, following Vegard's law.

Synthesis of thermoelectric Bi-Sb alloy nanoparticles 査読有り

Y. Tanaka, T. Itoh

Abstracts of R'09 Twin World Congress 頁： 78 2009年10月

記述言語：英語

Binary Bi-Sb alloy is a material with an excellent thermoelectric performance in the low temperature region below 0 oC. It is a hopeful candidate material for thermoelectric power conversion using cold heat resource. Bi-Sb alloy is a complete solid solution. However, its synthesis is difficult in the fusion method due to gravity segregation, and its single crystal is very brittle. No segregation, high mechanical strength and low thermal conductivity are required for the thermoelectric Bi-Sb alloy. These properties can be achieved by making up a polycrystalline body from nanosized Bi-Sb alloy particles. In this study, we attempted to synthesize the nanoparticles of thermoelectric Bi-Sb alloy through a modified polyol process. Two kinds of materials, Bi( NO3)3.5H2O (1mmol) and SbCl3 (1mmol) were dissolved in tetraethyleneglycole (TEG, 20ml) as a solvent by sonicating. After the solution was bubbled with Ar gas and strongly agitated at room temperature, a reducing agent NaBH4 (320 mg) dissolved in TEG (10 ml) was added slowly, and the Bi-Sb alloy was synthesized by heating to 180 oC in Ar gas. The synthesized particles in the solution were settled by centrifugation, washed with ethanol and TEG, and dried under a vacuum. The syntheses of Bi-Sb alloy nanoparticles were also attempted in various experimental conditions. The reaction products were characterized by X-ray diffraction (XRD), and transmission electron microscopy (TEM). A single phase of Bi-rich Bi-Sb alloy was identified by XRD analysis. Agglomerate of the Bi-Sb alloy particles with nano-order size were confirmed by TEM observation.

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