YOKOGAWA Yoshiyuki

写真a

Institutional repository


Title

Professor

Laboratory location

Sugimoto Campus

Degree 【 display / non-display

  • Tokyo Institute of Technology -  Dr.Science Engineering

Research Areas 【 display / non-display

Structural/Functional materials, Inorganic materials/Physical properties

Research Career 【 display / non-display

  • Development of micro-porous ceremics for VSC adsorption

    (Collaboration in Japan) Project Year :

    2006
    -
    Today

    Keyword in research subject:  nano material, micro-porous ceramics

  • Superparamagnetic nano particles embedded on hydroxyapatite

    (International Collaboration) Project Year :

    2012.04
    -
    Today

    Keyword in research subject:  superparamagnetic nano particle, hydroxyapatite

  • Deveplopment of novel bio-active cement materials

    (Collaboration in Organization) Project Year :

    2011.04
    -
    Today

    Keyword in research subject:  calcium phosphate, bio-active cement, bone filler

  • Nanotube array sheet as photocatalyst in visual light

    (Collaboration in Japan) Project Year :

    2006.04
    -
    Today

    Keyword in research subject:  nanotube, visual light responsibilty

  • Development of CPC materials for medical application

    (International Collaboration) Project Year :

    2006.04
    -
    Today

    Keyword in research subject:  Biomaterial

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Current Career 【 display / non-display

  • Osaka City University   Graduate School of Engineering   Mechanical and Physical Engineering Course   Professor  

Career 【 display / non-display

  • 2009
    -
    2013

    Anna University/visiting professor  

  • 2006
    -
    Today

    Osaka City University  

  • 1989
    -
    2006

    National Institute of Advanced Industrial Science and Technology  

Graduate School 【 display / non-display

  •  
    -
    1989

    Tokyo Institute of Technology  Graduate School, Division of Integrated Science and Engineering  Material Science 

Graduating School 【 display / non-display

  •  
    -
    1983

    The University of Tokyo   Faculty of Science  

 

Published Papers 【 display / non-display

  • First-Principles Calculations of Ionic Conduction in Olivine-Type Li<i><sub>x</sub></i>FePO<sub>4</sub>

    Kishida Ippei, Koyama Shota, Yokogawa Yoshiyuki

    公益社団法人 日本金属学会 MATERIALS TRANSACTIONS  2018  [Refereed]

     View Summary

    <p>Super ionic conductors are required for all solid Li ion batteries. Conduction mechanism of Li<i><sub>x</sub></i>FePO<sub>4</sub> has been revealed by first-principles calculations using plane-wave basis. Crystal structures were constructed using a unit cell and a 1 × 2 × 1 super cell. Transition of Li site occupation with the smallest energy fluctuation was searched through graph theory. Trajectories of Li ions and migration energies were obtained by Nudged Elastic Band Method. Results show the migrating atoms pass through faces of O polyhedra. At dilute limit of Li, a single ion migrated and had very low migration energy of 0.14 eV. Increasing the carrier concentration resulted in pairing of Li atoms and raised the migration energy. At higher concentration region, cooperative ionic conduction mechanisms of two Li ions occurred. Low migration energies were obtained to be 0.20 and 0.22 eV for <i>x</i> = 0.25 and 0.5 of Li<i><sub>x</sub></i>FePO<sub>4</sub>, respectively. Considering the migration energy and carrier concentration, Li<i><sub>x</sub></i>FePO<sub>4</sub> with the concentration region 0.25 ≤ <i>x</i> ≤ 0.5 should have high ionic conductivity. These mechanisms would be applied to develop new superionic conductors.</p>

    DOI CiNii

  • TEM observation of heat-treatedβ-tricalcium phosphate powder and its precursor obtained by mechanochemical reaction

    Atsumasa Shishido, Yoshiyuki Yokogawa

    Key Engineering Materials  759   184 - 188 2017.10  [Refereed]

  • Protein Adsorption on Spark Plasma Sintered Mesoporous Silicate Compacts

    Yoshiyuki Yokogawa *, Ryota Fumimoto, Suguru Inamura

    Key Engineering Materials  758   14 - 18 2017.10  [Refereed]

  • Silica Interlayer Formation of Mesoporous Silica Coatings on Hydroxyapatite Granules"

    Yoshiyuki Yokogawa, Atsumasa Shishido, K. Hiroyasu

    Key Engineering Materials  758   19 - 23 2017.10  [Refereed]

  • Kinetic modelling of cytochrome c adsorption on SBA-15

    Yokogawa Yoshiyuki, Yamauchi Rie, Saito Akira, Yamato Yuta, Toma Takeshi

    BIO-MEDICAL MATERIALS AND ENGINEERING  28 ( 1 ) 37 - 46 2017.04  [Refereed]

    DOI

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Books etc 【 display / non-display

  • Fabrication of hydroxyapatite calcite nanocomposite

    E.K. Girija, G. Suresh Kumar, A. Thamizhavel, Y. Yokogawa, S.Narayana Kalkura, R. Narayan (Part: Joint Work )

    Advances in Bioceramics and Porous Ceramics IV: Ceramic Engineering and Science Proceedings  2011

  • Synthesis and characterization of bioactive hydroxyapatite–calcite Nanocomposite for biomedical applications

    G.SureshKumar, E.K.Girija, A.Thamizhavel, Y.Yokogawa (Part: Joint Work )

    Journal of Colloid and Interface Science  2010

  • Synthesis and physico-chemical properties of zinc and carbonate co-substituted nano-hydroxyapatite for biomedical applications

    G. Suresh Kumar, E.K. Girija, A. Thamizhavel, Y. Yokogawa, S. Narayana Kalkura (Part: Joint Work )

    Macmillan Publisher India Limited// Biomedical Applications of Nanostructured Materials  2010

  • Advanced Mechanical Properties of Porous Hydroxyapatite Ceramics Prepared Using Hydroxyapatite Slip and its Slurry Synthesis

    (Part: Joint Work )

    2007

  • Novel Synthesis of Calcium Phosphate Ceramics and Composite from Bioactive to Bio-functional Integration

    -Yoshiyuki Yokogawa (Part: Single Work )

    Phosphorous Research Bulletine  2006

Review Papers (Misc) 【 display / non-display

  • Research on Inorganic Materials in Japan

    Klei Glas Keramiek  25 ( 5 ) 17 - 24 2004

Conference Activities & Talks 【 display / non-display

  • Neutral Liquid containing Chitosan and Polyol for Calcium Phosphate Cement

    Yoshiyuki Yokokawa, Ryota Izumiki, Shu Senga, Seiya Shibata

    17th Asian Bioceramics Symposium  2017.11 

  • In vitro Biocompatibility of Nano Cobalt Oxide embedded Hydroxyapatite

    Yoshiyuki Yokogawa, Yuichiro Iguchi

    17th Asian Bioceramics Symposium 2017  2017.11 

  • TEM observation of heat-treated b-tricalcium phosphate powder and its precursor obtained by mechanochemical reaction

    Atsumasa Shishido1, Yoshiyuki Yokogawa

    Bioceramics29  2017.10 

  • Protein adsorption on spark plasma sintered mesoporous silicate compacts

    Y.Yokogawa, R.Fumimoto, and S,Inamura

    Bioceramics29  2017.10 

  • Silica Interlayer Formation of Mesoporous Silica Coatings on Hydroxyapatite Granules

    Y.Yokogawa, A.Shishido, and K.Hiroyasu

    Bioceramics29  2017.10 

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Other educational activity and Special note 【 display / non-display

  • Contribution to FD activities

    (2012)

Educational activity record 【 display / non-display

  • Academic year : 2012

     View Details

    Number of instructed the graduation thesis
    7
    Number of graduation thesis reviews
    7
    Number of instructed the Master's Program (previous term)
    11
    Number of instructed the Master's Program (letter term)
    0
    Number of master's thesis reviews (chief)
    6
    Number of master's thesis reviews (vice-chief)
    3
    Number of doctoral thesis reviews (chief)
    0
    Number of doctoral thesis reviews (vice-chief)
    0
 

Theme of Possible Research Exchange 【 display / non-display

  • Water purification system using carrier for enzyme

    Request for collaborative research : The private sector, such as other institutions

    Type of research exchange : Technical consultation, Consignment study, Collaborative research, Lecture

 

Foreigner acceptance 【 display / non-display

  • Academic year : 2014

     View Details

    Number of foreigners accepted
    1
    Number of International Students
    1