KOWADA Yoshiyuki

FacultyMathematics and Natural Sciences
PositionProfessor
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Last Updated :2019/07/02

Researcher Profile and Settings

Association Memberships

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

Research Activities

Research Areas

  • Material engineering, Inorganic materials/Physical properties

Research Interests

    TiO_2

Published Papers

  • Structural and Electronic-State Changes of a Sulfide Solid Electrolyte during the Li Deinsertion-Insertion Processes, T. Hakari, M. Deguchi, K. Mitsuhara, T. Ohta, K. Saito, Y. Orikasa, Y. Uchimoto, Y. Kowada, A. Hayashi, and M. Tatsumisago, Chemistry of Materials, 29, (11,13) 4768 - 4774, 06
  • Structure analyses using X-ray photoelectron spectroscopy and X-ray absorption near edge structure for amorphous MS3 (M: Ti, Mo) electrodes in all-solid-state lithium batteries, T. Matsuyama, M. Deguchi, K. Mitsuhara, T. Ohta, T. Mori, Y. Orikasa, Y. Uchimoto, Y. Kowada, A. Hayashi, M. Tatsumisago, J. Power Sources, 313, 104 - 111
  • Electronic states of Nd3+ ions in phosphate glasses calculated by the discrete- variational multi-electron method, Y. Kowada, K. Ogasawara, J. Non-Cryst. Solids, 356, (44-49) 2454 - 2457
  • Chemical Bonding of Li Ions in Li7P3S11 Crystal, Y. Kowada, A. Hayashi, M. Tatsumisago, J. Phys. Soc. Jpn, 79, 65 - 68
  • Electronic State and Photosensitivity of Metal Alkoxides Chemically Modified with β-Diketones, Y. Kowada and N. Noma, J. Sol-Gel Sci. and Tech., 52, (1) 166 - 169
  • Chemical bonding and lithium ion conductions in Li3N, Y. Kowada, M. Tatsumisago, T. Minami, Solid State Ionics, 180, 462 - 466
  • Total Cluster Energy Calculation of Lithium Ion Conductors by the DV-Xα Method, Y. Kowada, W. Nishitani, K. Ogasawara, Int. J. Quant. Chem., 109, (12) 2658 - 2663
  • Fluorescence Spectra of Pr3+ Ions in Phosphate Materials Calculated by the   DVME Method, Y. Kowada, S. Noma, K. Ogasawara, Int. J. Quant. Chem., 109, (12) 2753 - 2757
  • Chemical Bonding of Mobile Cations in Superionic Conductors, Y. Kowada, M. Tatsumisago, T. Minami, H. Adachi, Adv. Quantum Chem., 54, 255 - 270
  • Electronic state of sulfide-based lithium ion conducting glasses, Y. Kowada, M. Tatsumisago, T. Minami, H. Adachi, J. Non-Cryst. Solids, 354, 360 - 364

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 of SiO_2-M_xO_y(M_xO_y=P_2O_5,TiO_2,ZrO_2) Glasses, KOWADA Yoshiyuki, ADACHI Hirohiko, MINAMI Tsutomu, Journal of the Ceramic Society of Japan, 101, (1180) 1330 - 1334,   1993 12 01 , The electronic states of the SiO2-MxOy(MxOy=P2O5, TiO2 and ZrO2) glasses, which have good passivation ability, were calculated by the DV-Xα 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 Li_2O-P_2O_5 Melts with Large Amounts of Li_2O, KOWADA Yoshiyuki, ADACHI Hirohiko, TATSUMISAGO Masahiro, MINAMI Tsutomu, Journal of the Ceramic Society of Japan, 98, (1133) 108 - 109,   1990 01 01 , 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 Work, 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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