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293 results on '"Tachibana, Takeshi"'

151. Development of Mild Hibrid System

Author

TERATANI, Tatsuo, primary, KURAMOCHI, Kenjiro, additional, KUSUMI, Hidetoshi, additional, TACHIBANA, Takeshi, additional, NAKAO, Hatsuo, additional, and MORIYA, Kouki, additional

Published
2002
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169. Diamond films heteroepitaxially grown on platinum (111)

Author

Tachibana, Takeshi, primary, Yokota, Yoshihiro, additional, Miyata, Koichi, additional, Onishi, Takashi, additional, Kobashi, Koji, additional, Tarutani, Masayoshi, additional, Takai, Yoshizo, additional, Shimizu, Ryuichi, additional, and Shintani, Yoshihiro, additional

Published
1997
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184. Preparation of Aluminum Oxynitride and Nitride Spherical Powders Via Flame Synthesis Assisted by DC Arc Plasma.

Author

Takao, Yasumasa, Shuzenji, Kiyotaka, and Tachibana, Takeshi

Subjects
ALUMINUM, NITRIDES, POWDER metallurgy, OXYGEN, MICROMETERS, TEMPERATURE, FORCE & energy, INCENSE burners & containers, FLAME
Abstract

Spherical powders of aluminum oxynitride/nitride are directly prepared by flame synthesis in which oxygen serves as an indispensable reactant. Nonoxide powders are commonly nonspherical, and the particle sizes of these powders are less than submicrometers. The major limiting factors for the synthesis are the free energy, reaction temperature, and reaction rate. The innovative issue related to this flame technology that is assisted by plasma is the ambivalence of the reducing gas atmosphere over 1500 K. The chemical equilibrium calculated indicates that the plasma heating compensates for the lack of reaction temperature under a low-oxygen condition. This burner realizes a high-speed reaction with the help of the reactive species in the arcs. [ABSTRACT FROM AUTHOR]

Published
2008
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186. Influence of ion substitution on the magnetic structure and permeability of Z-type hexagonal Ba-ferrites: Ba3Co2-xFe24+x-yCryO41

Author

Tachibana, Takeshi, Nakagawa, Takashi, Takada, Yukio, Shimada, Takeshi, and Yamamoto, Takao A.

Subjects
*OSMOSIS, *CRYSTALLOGRAPHY, *MAGNETIZATION, *FERRITES
Abstract

Abstract: Z-type hexagonal ferrite samples Ba3Co2-xFe24+x-yCryO41 () in which Co2+ and Fe3+ were substituted with Fe2+ and Cr3+, respectively, were prepared by the ceramic process in oxygen atmosphere. The simultaneous substitution was found to enhance the permeability. In an isotropic sample, the maximum was 21, and the peak value of was 14 at 1GHz. Crystal anisotropy fields were evaluated by measuring anisotropic magnetization behavior of a sample press-compacted in a magnetic field in order to investigate the influences of the cation substitution on the permeability. The results indicated that the simultaneous substitution mainly caused the variation of the crystal anisotropy fields rather than the change of saturation magnetization. [Copyright &y& Elsevier]

Published
2004
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188. Incorporation of Pt Particles in Boron-Doped Diamond Thin Films Applications in Electrocatalysis

Author

Wang, Jian, Swain, Greg M., Tachibana, Takeshi, and Kobashi, Koji

Abstract

Polycrystalline, boron-doped diamond (BDD) thin films were codeposited with particles on either conducting or substrates. These dimensionally stable and corrosion-resistant electrodes consisted of well-faceted microcrystallites with dispersed particles incorporated into the surface region. The metal particles were well anchored and ranged from 10 to in diam. The active metal loading was in the range of 200 to (diamond electrode geometric area) however, the real catalyst loading was estimated to be near . Importantly, the particles at the surface were in electronic communication with the current collecting substrate through the BDD matrix, and they were electroactive for underpotential deposition of hydrogen and oxidation of methanol. The dispersed particles were extremely stable as no loss in the activity was observed after 2000 potential cycles between the oxygen and hydrogen evolution regimes in . Characterization results are reported. (c)2000 The Electrochemical Society

Published
2000

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