KOWADA Yoshiyuki

FacultyMathematics and Natural Sciences
PositionProfessor
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Last Updated :2020/09/14

Researcher Profile and Settings

Education

  •   1986  - 1988 , Osaka Prefecture University, Graduate School of Engineering

Degree

  • 博士(工学), 大阪府立大学

Association Memberships

  • The Ceramic Society of Japan
  • THE CHEMICAL SOCIETY OF JAPAN

Academic & Professional Experience

  •   2013  - 現在, Hyogo University of Teacher Education, Graduate School of Education
  •   2007  - 2013 , Hyogo University of Teacher Education, Graduate School of Education
  •   1997  - 2007 , Hyogo University of Teacher Education, Faculty of School Education
  •   1993  - 1997 , Hyogo University of Teacher Education, Faculty of School Education
  •   1988  - 1993 , Hyogo University of Teacher Education, Faculty of School Education

Research Activities

Research Areas

  • Nanotechnology/Materials, Inorganic materials

Research Interests

    TiO_2

Published Papers

  • Electronic state and photosensitivity of metal alkoxides chemically modified with beta-diketones, Y. Kowada, N. Noma, JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 52, (1) 166 - 169, 10
  • Total Cluster Energy Calculation of Lithium Ion Conductors by the DV-X alpha Method, Y. Kowada, W. Nishitani, K. Ogasawara, INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, 109, (12) 2658 - 2663, 10
  • Study of the Osteoconductive Activity, T. Ishii, D. Kudo, S. Tabakodani, J. Tanaka, T. Ikoma, G. Sakane, Y. Kowada, K. Ogasawara, Bull. Soc. Discrete Variational Xα, 20(1-2), 74-78 (2008)., Bull. Soc. Discrete Variational Xα, 20(1-2), 74-78 (2008)., 20, (1-2) 74 - 78

Misc

  • Preparation of pH Measuring Films byTransparency Sheets for Ink-Jet Printers, KOWADA Yoshiyuki, IKEDA Mariko, NAGATANI Hirohisa, OZEKI Toru, Chemical education, 53, (11) 637 - 638,   2005 11 20
  • Electronic states calculated by the DV-Xα cluster method for lithium ion conductive Li2S-SiS2-Li4SiO4 oxysulfide glasses, Ryuhei Araki, Akitoshi Hayashi, Yoshiyuki Kowada, Masahiro Tatsumisago, Tsutomu Minami, Journal of Non-Crystalline Solids, 288, (1-3) 1 - 7,   2001 08 , The electronic states of the Li2S-SiS2-Li4SiO4 oxysulfide glasses were investigated by using the DV-Xα cluster method as a non-empirical molecular orbital calculation. The calculation was carried out for the dimer-framed Li6Si2OmSn (m + n = 7) cluster models expected to be present in the oxysulfide glasses. The bond states around lithium ions changed from covalent to ionic with an increase in the number of non-bridging oxygens. The increase of covalency of the Si-S and Si-O bonds in the frame structure brought about the increase of covalency between the frame and lithium ions. The bond states around lithium ions of the cluster with one bridging oxygen were similar to those of the cluster in the pure sulfide glasses. This similarity seems to be one of the reasons for high ionic conductivities, over 10-4 S cm-1, in the oxysulfide glasses with small amounts of lithium ortho-oxosalts. © 2001 Elsevier Science B.V. All rights reserved.
  • ELECTRONIC STATES OF SIO2-MXOY (MXOY=P2O5, TIO2 AND ZRO2) GLASSES, Y KOWADA, H ADACHI, T MINAMI, NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI-JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 101, (12) 1330 - 1334,   1993 12 , The electronic states of the SiO2-M(x)O(y) (M(x)O(y) = P2O5, TiO2 and ZrO2) glasses, which have good passivation ability, were calculated by the DV-Xalpha cluster method. The energy level structure of glasses containing the transition metal oxides, TiO2 and ZrO2, is different from that of pure SiO2 and SiO2-P2O5 glasses. The bond order between oxygen and sodium ion diffusing to the glass matrix in the systems SiO2-P2O5, SiO2-TiO2 and SiO2-ZrO2 is larger than that in SiO2 glass. Such a result is probably the origin of the passivation ability of these glasses.
  • HIGH-TEMPERATURE RAMAN-SPECTRA OF LI2O-P2O5 MELTS WITH LARGE AMOUNTS OF LI2O, Y KOWADA, H ADACHI, M TATSUMISAGO, T MINAMI, NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI-JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 98, (1) 108 - 109,   1990 , Proportion of metaphosphate, pyrophosphate, and orthophosphate in Li_2O-P_2O_5 melts containing large amounts of Li_2O were estimated by high temperature Raman spectra. The change in proportion of each structural unit with composition in melts was similar to that in rapidly-quenched glasses, though the proportions of metaphosphate and orthophosphate groups were somewhat higher in melts than in glasses.

Books etc

  • The DV-Xα Molecular-Orbital Calculation Method, Joint author, Chapter 1 The DV-Xα Molecular orbital Calculation Method and Recent Development, Springer,   2015

Awards & Honors

  •   2018 08 , The Society of DV-Xalfa, Distinguished contribution Award
  •   2013 08 , The Society of DV-Xalfa, academic award
  •   2009 08 , The Society of DV-Xalfa, Distinguished contribution Award
  •   1998 01 , The Ceramic Society of Japan, the 52nd Progress award
  •   1995 08 , The Society of DV-Xalfa, The 1st Encouragement Award


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