研究者詳細 - 岸本　昭

論文 - 岸本　昭

分割表示 211 件中 41 - 60 件目／全件表示 >>

High rate capability of a BaTiO3-decorated LiCoO2 cathode prepared via metal organic decomposition 査読

Takashi Teranishi, Naoto Katsuji, Yumi Yoshikawa, Mika Yoneda, Hidetaka Hayashi, Akira Kishimoto, Koji Yoda, Hidefumi Motobayashi, Yuzo Tasaki

JAPANESE JOURNAL OF APPLIED PHYSICS 55 ( 10 ) 2016年10月

Influence of PMSA-based polymer on the settling velocity of CNT in Aqueous Media 査読

Naoyuki Nishimura, Shin-Ichi Takeda, Takashi Teranishi, Hidetaka Hayashi, Naoto Saito, Akira Kishimoto

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 63 ( 10 ) 861 - 865 2016年9月

High rate capability of a BaTiO

Teranishi Takashi, Katsuji Naoto, Yoshikawa Yumi, Yoneda Mika, Hayashi Hidetaka, Kishimoto Akira, Yoda Koji, Motobayashi Hidefumi, Tasaki Yuzo

Jpn. J. Appl. Phys. 55 ( 10 ) 10TB01 2016年8月

記述言語：英語出版者・発行元：Institute of Physics

Metal organic decomposition (MOD) using octylic acid salts was applied to synthesize a BaTiO<inf>3</inf>–LiCoO<inf>2</inf>(BT–LC) composite powder. The Ba and Ti octylates were utilized as metal precursors, in an attempt to synthesize homogeneous BT nanoparticles on the LC matrix. The BT–LC composite, having a phase-separated composite structure without any impurity phase, was successfully obtained by optimizing the MOD procedure. The composite prepared using octylate precursors exhibited a sharper distribution and better dispersibility of decorated BT particles. Additionally, the average particle size of the decorated BTs using metal octylate was reduced to 23.3 nm, compared to 44.4 nm from conventional processes using Ba acetate as well as Ti alkoxide as precursors. The composite cathode displayed better cell performance than its conventional counterpart; the discharge capacity of the metal octylate-derived specimen was 55.6 mAh/g at a 50C rate, corresponding to 173% of the capacity of the conventional specimen (32.2 mAh/g). The notable improvement in high rate capability obtained in this study, compared with the conventional route, was attributed to the higher density of the triple junction formed by the BT–LC–electrolyte interface.

DOI： 10.7567/JJAP.55.10TB01

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Grain size-sensitive viscoelastic relaxation and seismic properties of polycrystalline MgO 査読

A. Barnhoorn, I. Jackson, J. D. Fitz Gerald, A. Kishimoto, K. Itatani

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 121 ( 7 ) 4955 - 4976 2016年7月

Gastight, closed pore inclusive porous ceramics through a superplastically foaming method 査読

Akira Kishimoto, Atsuki Tohji, Takashi Teranishi, Hidetaka Hayashi

Ceramic for Environmental Systems 257 69 - 79 2016年5月

Lithium ion conductivity of oriented Li0.33La0.56TiO3 solid electrolyte films prepared by a sol-gel process 査読

Takashi Teranishi, Yuki Ishii, Hidetaka Hayashi, Akira Kishimoto

SOLID STATE IONICS 284 1 - 6 2016年1月

Electrical conductivity of ceria-based oxide under 24 GHz millimeter-wave heating in varying thermal environments 査読

Salmie. S.C. Abdulla, T. Teranishi, H. Hayashi, A. Kishimoto

J. Jpn. Soc. Powder Powder Metallurgy 63 ( 7 ) 663 - 667 2016年

担当区分：最終著者,　責任著者記述言語：英語出版者・発行元：一般社団法人粉体粉末冶金協会

<p>Sm-doped CeO₂ ceramics were prepared by conventional solid state method. The electrical conductivity of the samples was measured under conventional heating and 24 GHz millimeter-wave (MMW) heating, and the results were compared. During MMW heating, 5 mol% Sm-doped CeO₂ pellets with different thickness were used as susceptors, meanwhile Al₂O₃ fiber board was used as thermal insulator and its design varies by the number of open channels. The aforementioned susceptors and thermal insulators dependency of conductivity values during MMW heating were studied. Conductivity of samples under MMW heating was found to be higher than under conventional heating. Results showed that the different susceptor thickness and thermal insulator design could result in different conductivity values. These results were attributed to the phenomenon of heat dissipation from surface and the amount of direct radiation reached the sample. Specific susceptor thickness and specific insulator design which leads to highest conductivity were identified. By combining these two effects, the largest enhancement of conductivity of ceria based ceramics was obtained.</p>

DOI： 10.2497/jjspm.63.663

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In situ time-resolved dispersive X-ray absorption fine structure analysis of BaTiO₃–LiCoO₂ composites for lithium ion batteries 査読

Takashi TERANISHI, Yumi YOSHIKAWA, Ryota MIYAHARA, Hidetaka HAYASHI, Akira KISHIMOTO, Misaki KATAYAMA, Yasuhiro INADA

Journal of the Ceramic Society of Japan 124 ( 6 ) 659 - 663 2016年

Influence of Millimeter-wave Irradiation on the Cation Interdiffusion of Ceria/Zirconia Ceramic Couple 査読

Mikiya WAKIMOTO, Takashi TERANISHI, Hidetaka HAYASHI, Akira KISHIMOTO

63 ( 11 ) 981 - 985 2016年

Influence of PMSA-Based Polymer on the Settling Velocity of CNT in Aqueous Media 査読

Naoyuki Nishimura, Shin-ichi Takeda, Takashi Teranishi, Hidetaka Hayashi, Naoto Saito, Akira Kishimoto

MATERIALS TRANSACTIONS 56 ( 12 ) 2006 - 2009 2015年12月

Stabilisation dopant-dependent facilitation in ionic conductivity on millimeter-wave irradiation heating of zirconia-based ceramics 査読

Akira Kishimoto, Hideki Hasunuma, Takashi Teranishi, Hidetaka Hayashi

JOURNAL OF ALLOYS AND COMPOUNDS 648 740 - 744 2015年11月

In situ impedance analysis on BaTiO3-LiCoO2 composite cathodes for lithium ion batteries 査読

Takashi Teranishi, Yumi Yoshikawa, Ryo Sakuma, Hirokazu Okamura, Hidetaka Hayashi, Akira Kishimoto, Yasuo Takeda

JAPANESE JOURNAL OF APPLIED PHYSICS 54 ( 10 ) 2015年10月

Effect of 24 GHz microwave heating on creep deformation of yttria partially stabilised zirconia ceramics with titania and tin oxide additives 査読

Akira Kishimoto, Kyohei Yamashita, Takashi Teranishi, Hidetaka Hayashi, Saburo Sano

CERAMICS INTERNATIONAL 41 ( 4 ) 5785 - 5789 2015年5月

High-Rate Capabilities of Ferroelectric BaTiO3-LiCoO2 Composites with Optimized BaTiO3 Loading for Li-Ion Batteries 査読

Takashi Teranishi, Yumi Yoshikawa, Ryo Sakuma, Hirokazu Okamura, Hideki Hashimoto, Hidetaka Hayashi, Tatsuo Fujii, Akira Kishimoto, Yasuo Takeda

ECS ELECTROCHEMISTRY LETTERS 4 ( 12 ) A137 - A140 2015年

Effect of Mg Loading on the High-frequency Tunability of Ba0.8Sr0.2TiO3 Ceramics

Takashi Teranishi, Tsuyoshi Sogabe, Hidetaka Hayashi, Akira Kishimoto, Kengo Iokibe, Yoshitaka Toyota

Japanese Journal of Applied Physics 54 ( 1 ) 11502-1-011502-6 - 11502 2015年

記述言語：英語出版者・発行元：Institute of Physics

The effect of Mg loading on the high-frequency tunable properties and dielectric loss of Ba<inf>0.8</inf>Sr<inf>0.2</inf>Ti<inf>1−</inf><inf>x</inf>Mg<inf>x</inf>O<inf>3</inf>(BSTM) ceramics was investigated. Variation in the lattice parameters and the 90° domain configuration with Mg loading indicated a decrease in the tetragonal distortion. Additionally, the 90° domain size decreased slightly with a low Mg loading, up to 0.1 mol %, resulting in a higher domain-wall density compared with the non-doped specimen. The 0.075 mol % Mg-loaded BSTM ceramic exhibited the highest tunability; this was attributed to the domain-size effect. The loss tangent (tan δ) roughly decreased with Mg loading, due to loaded oxygen vacancies. The maximum figure of merit value (FOM = tunability/tan δ) at 10 MHz was achieved for the 0.075 mol % Mg specimen, twice that of the non-doped specimen, due to an increase in the tunability and a decrease in the loss tangent with Mg loading.

DOI： 10.7567/JJAP.54.011502

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Dependence of the conductivity of polycrystalline Li0.33BaxLa0.56-2/3xTiO3 on Ba loading 査読

Takashi Teranishi, Akane Kouchi, Hidetaka Hayashi, Akira Kishimoto

SOLID STATE IONICS 263 33 - 38 2014年10月

High-rate performance of ferroelectric BaTiO3-coated LiCoO2 for Li-ion batteries 査読

Takashi Teranishi, Yumi Yoshikawa, Ryo Sakuma, Hideki Hashimoto, Hidetaka Hayashi, Akira Kishimoto, Tatsuo Fujii

APPLIED PHYSICS LETTERS 105 ( 14 ) 2014年10月

Microwave Absorbency Change of Nitride Powders under Vacuum Heating 査読

Saburo Sano, Sadatsugu Takayama, Akira Kishimoto

Advances in Science and Technology 88 31 - 36 2014年10月

掲載種別：研究論文（学術雑誌）出版者・発行元：Trans Tech Publications, Ltd.

We measured the microwave and millimeter-wave behaviors of ceramics and metal powders as a basis for developing microwave and millimeter-wave heating technology. In this study, nitride powders were subjected to microwave absorption measurements at elevated temperature. These measurements were performed using a system comprising a vector network analyzer, a circular wave-guide fixture, and a vacuum furnace. The sample’s microwave absorbency was evaluated by the change in reflection power from the sample in the circular wave-guide fixture under vacuum heating. Measurements were performed at approximately 24 GHz and at temperature up to approximately 1100°C. Boron nitride (BN) exhibited almost no absorption of microwaves up to 1100°C, similar to the results of a low-loss oxide powder such as alumina. Dichromium mononitride (Cr2N) powder exhibited a rather high absorption of microwaves at room temperature. During vacuum heating, absorbency of Cr2N started to decrease at 300°C, and became almost zero at temperature greater than 600°C, similar to the behavior of iron powder. This result indicated that roughly packed Cr2N powder absorbs microwave radiation; however, during vacuum heating, the compact body was sintered and the whole sample body became a reflector of microwaves. This change was irreversible, and the sample maintained its reflection behavior upon the cooling. When a mixed powder of Cr2N (20 mass%) and Al2O3 was heated under vacuum, the compact sample exhibited microwave absorption that increased with increasing temperature. This change was reversible upon cooling. These results indicated that the mixed powder did not become reflector of microwaves; Cr2N particles were not electrically connected each other because the Al2O3 particles kept the Cr2N particles separate during the vacuum heating process.

DOI： 10.4028/www.scientific.net/ast.88.31

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The isothermal conductivity improvement in zirconia-based ceramics under 24 GHz microwave heating 査読

Akira Kishimoto, Keiko Ayano, Takashi Teranishi, Hidetaka Hayashi

MATERIALS CHEMISTRY AND PHYSICS 143 ( 2 ) 486 - 489 2014年1月

Relationship Between Phonon Parameters and Oxygen Ion Conductivity for Al-Yb Co-doped Zirconia 査読

Takashi Teranishi, Nami Matsubara, Hidetaka Hayashi, Akira Kishimoto

ELECTROCERAMICS IN JAPAN XVI 582 107 - 110 2014年

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