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Dive into the research topics where Hirofumi Kakemoto is active.

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Featured researches published by Hirofumi Kakemoto.


Journal of The European Ceramic Society | 2001

Synthesis and dielectric properties of SrxBa1-xNb2O6 formed by YAG laser ablation

Ken-ichi Kakimoto; Hirofumi Kakemoto; Akira Baba; S. Fujita; Yoichiro Masuda

Abstract Tungsten-bronze type tetragonal Sr x Ba 1– x Nb 2 O 6 (SBN) ceramics have been synthesized by pressure-less sintering at 1250°C through a mixed-oxide route. With increasing x value in the range from 0.3 to 0.6, the Curie temperature shifted to lower temperature, but the corresponding maximum dielectric constant increased. Further, Sr 0.3 Ba 0.7 Nb 2 O 6 thin films have been formed by pulsed YAG laser deposition (PLD) technique using a selected SBN bulk target with various choices of the deposition parameters. When Pt-coated Si substrates were used for PLD, a preferential c-axis-ordered structure was observed in the films deposited using an energy density above 2.0 J/cm 2 , at a substrate temperature above 650°C, and in oxygen partial pressure below 7 Pa. The thin film yielded a rhomboidal P – E hysteresis loop, and showing a remanent polarization ( P r ) of 3.1 μ C/cm 2 and coercive field ( E c ) of 1.28 kV/cm.


Electroceramic Materials and Applications: Ceramic Transactions Series, Volume 196 | 2011

Dielectric Permittivity Mapping with Non-Contact Microwave Probe for Dielectric Materials

Hirofumi Kakemoto; Song-Min Nam; Satoshi Wada; Takaaki Tsurumi


日本セラミックス協会学術論文誌 : Nippon Seramikkusu Kyokai gakujutsu ronbunshi = Journal of the Ceramic Society of Japan | 2008

Preparation and evaluation of microwave dielectric ceramic thick films by aerosol deposition process( Global Innovation in Advanced Ceramics)

Jianyong Li; Daisuke Tsukiori; Hirofumi Kakemoto; Satoshi Wada; Takaaki Tsurumi


Preprints of Annual Meeting of The Ceramic Society of Japan Preprints of Fall Meeting of The Ceramic Society of Japan Annual Meeting of The Ceramic Society of Japan, 2006 | 2006

Preparation of the TiO2 Film for Dye Sensitized Solar Cell by Aerosol Deposition Method

Daisuke Tsukiori; Hirofumi Kakemoto; Akira Nakajima; Satoshi Wada; Takaaki Tsurumi; Song-Min Nam; Jun Akedo


Archive | 2006

PRESENTATIONS ONLY (Podium and Poster) MS01: Multi-Functional Cellular Materials with Graded Pore Density Evaluation of the Mechanical Properties of Polymeric Membranes for Gas Separation

Franco M. Furgiuele; Enrico Drioli; Thorsten Gerdes; Monika Willert-Porada; Harold H. Wolf; Hirofumi Kakemoto; Tetsuya Higuchi; Setsuko Wada; Takaaki Tsurumi


Preprints of Annual Meeting of The Ceramic Society of Japan Preprints of Fall Meeting of The Ceramic Society of Japan Annual Meeting of The Ceramic Society of Japan, 2005 | 2005

Size Induced Phase Transition of Barium Titanate Fine Particles

Takuya Hoshina; Hirofumi Kakemoto; Takaaki Tsurumi; Satoshi Wada; Masatomo Yashima


Preprints of Annual Meeting of The Ceramic Society of Japan Preprints of Fall Meeting of The Ceramic Society of Japan 18th Fall Meeting of The Ceramic Society of Japan & 1st Asia-Oceania Ceramic Federation (AOCF) Conference | 2005

Phase Transition Behavior of nm-sized Barium Titanate Fine Particles

Takuya Hoshina; Hirofumi Kakemoto; Takaaki Tsurumi; Satoshi Wada; Masatomo Yashima; Yoshihiro Kuroiwa


Preprints of Annual Meeting of The Ceramic Society of Japan Preprints of Fall Meeting of The Ceramic Society of Japan 18th Fall Meeting of The Ceramic Society of Japan & 1st Asia-Oceania Ceramic Federation (AOCF) Conference | 2005

Preparation and Dielectric Properties of 3D Colloidal Packing of Barium Titanate Thin Particles Using Meniscus

Aki Yazawa; Takuya Hoshina; Hirofumi Kakemoto; Satoshi Wada; Takaaki Tsurumi


Preprints of Annual Meeting of The Ceramic Society of Japan Preprints of Fall Meeting of The Ceramic Society of Japan 17th Fall Meeting of The Ceramic Society of Japan | 2004

Development of new preparation method for nano-sized barium titanate particles

Michiyasu Nishiyama; Takuya Hoshina; Hirofumi Kakemoto; Satoshi Wada; Takaaki Turumi


Preprints of Annual Meeting of The Ceramic Society of Japan Preprints of Fall Meeting of The Ceramic Society of Japan 17th Fall Meeting of The Ceramic Society of Japan | 2004

Structure Refinement of nm-sized Barium Titanate Particles using Partial profile relaxation method

Hoshina Takuya; Hirofumi Kakemoto; Takaaki Tsurumi; Satoshi Wada; Masatomo Yashima; Kenichi Kato; Masaki Takata

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Satoshi Wada

Tokyo University of Science

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Takaaki Tsurumi

Tokyo Institute of Technology

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Takuya Hoshina

Tokyo Institute of Technology

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Yoichiro Masuda

Hachinohe Institute of Technology

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Ken-ichi Kakimoto

Nagoya Institute of Technology

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Masatomo Yashima

Tokyo Institute of Technology

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Shigetaka Fujita

Hachinohe Institute of Technology

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Daisuke Tsukiori

Tokyo Institute of Technology

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Song-Min Nam

National Institute of Advanced Industrial Science and Technology

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Aki Yazawa

Tokyo Institute of Technology

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