OKA Ryohei

写真a

Affiliation Department etc.

Department of Life Science and Applied Chemistry
Department of Life Science and Applied Chemistry
Center for Innovative Young Researchers

Title

Assistant Professor

Graduating School

  • 2012.04
    -
    2016.03

    Tottori University   Faculty of Engineering   Graduated

Graduate School

  • 2018.04
    -
    2021.03

    Tottori University  Graduate School, Division of Engineering  Doctor's Course  Completed

  • 2016.04
    -
    2018.03

    Tottori University  Graduate School, Division of Engineering  Master's Course  Completed

External Career

  • 2018.04
    -
    2021.03

      Special researcher of the Japan Society for the Promotion of Science  

 

Thesis for a degree

  • Studies on Novel Environment-Friendly Inorganic Pigments

    Ryohei Oka 

      2021.03  [Refereed]

    8   1

Papers

  • Novel Inorganic Orange Pigments Based on BiFeWO6

    Ryohei Oka, Akari Takemura, Yusuke Shobu, Kohei Minagawa, Toshiyuki Masui

    Journal of the Ceramic Society of Japan ( The Ceramic Society of Japan )    2022.01  [Refereed]  [Invited]

    Research paper (scientific journal)   Multiple Authorship

  • Novel Orange Color Pigments Based on La3LiMnO7

    Ryohei Oka, Jun-ichi Koyama, Takuro Morimoto, Toshiyuki Masui

    Molecules ( MDPI )  26 ( 20 ) 6243   2021.10  [Refereed]  [Invited]

    Research paper (scientific journal)   Multiple Authorship

  • Synthesis and Characterization of Ca1−xEuxZrO3 as Environmentally Friendly Inorganic Yellow Pigments

    Kohei Minagawa, Yuichi Nishiguchi, Ryohei Oka, Toshiyuki Masui

    ACS Omega ( American Chemical Society )  6 ( 4 ) 3411 - 3417   2021.01  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Effect of [MnO6] Octahedra to the Coloring Mechanism of (Li1−xNax)2MnO3

    Ryohei Oka, Kohei Kusukami, Toshiyuki Masui

    ACS Omega ( American Chemical Society )  5 ( 22 ) 13108 - 13114   2020.05  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Improvement of Near-infrared (NIR) Reflectivity and Black Color Tone by Doping Zn2+ into the Ca2Mn0.85Ti0.15O4 Structure

    Ryohei Oka, Senri Iwasaki, Toshiyuki Masui

    RSC Advances ( Royal Society of Chemistry )  9 ( 66 ) 38822 - 38827   2019.11  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Submicron-Sized Phosphors Based on Hexagonal Rare Earth Oxycarbonate for Near-infrared Excitation and Emission

    Mizuki Watanabe, Yasuhiro Sejima, Ryohei Oka, Shintaro Ida, Toshiyuki Masui

    Journal of Asian Ceramic Societies ( Taylor and Francis Group )  7 ( 4 ) 502 - 508   2019.10  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Enhancement of Near-infrared Emission of Neodymium-Doped Monoclinic Gadolinium Phosphate Nanophosphors by Surface Coating with Calcium Phosphate

    Mizuki Watanabe, Norifumi Yamamoto, Tomoaki Matsuo, Ryohei Oka, Shintaro Ida, Toshiyuki Masui

    Journal of Asian Ceramic Societies ( Taylor and Francis Group )  7 ( 4 ) 509 - 517   2019.10  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Synthesis and Color Evaluation of Ta5+-Doped Bi2O3

    Ryohei Oka, Yusuke Shobu, Toshiyuki Masui

    ACS Omega ( American Chemical Society )  4 ( 4 ) 7581 - 7585   2019.04  [Refereed]  [Invited]

    Research paper (scientific journal)   Multiple Authorship

  • Novel Environmentally Friendly Inorganic Orange Pigments Based on Ca14Al10Zn6O35

    Ryohei Oka, Takashi Kosaya, Toshiyuki Masui

    Chemistry Letters ( The Chemical Society of Japan )  47 ( 12 ) 1522 - 1525   2018.10  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Synthesis and Characterisation of Ba(Zn1−xCox)2Si2O7 (0 ≤ x ≤ 0.50) for Blue-violet Inorganic Pigments

    Takashi Tsukimori, Yusuke Shobu, Ryohei Oka, Toshiyuki Msaui

    RSC Advances ( Royal Society of Chemistry )  8 ( 16 ) 9017 - 9022   2018.02  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

display all >>

Presentations

  • Synthesis and Characterization of (Li1−xNax)2MnO3 as Environmentally Friendly Red Pigments

    Kohei Kusukami, Ryohei Oka, Toshiyuki Masui

    The 36th International Japan-Korea Seminar on Ceramics (JK-Ceramics 36)  (Tottori)  2019.11  -  2019.11 

  • Novel Inorganic Black Pigments Based on Ca2MnO4 for High Near-Infrared Reflectance

    Ryohei Oka, Senri Iwasaki, Toshiyuki Masui

    The 36th International Japan-Korea Seminar on Ceramics (JK-Ceramics 36)  (Tottori)  2019.11  -  2019.11 

  • Synthesis and Color Evaluation of Ta5+-doped Bi2O3

    Yusuke Shobu, Ryohei Oka, Toshiyuki Masui

    The 36th International Japan-Korea Seminar on Ceramics (JK-Ceramics 36)  (Tottori)  2019.11  -  2019.11 

  • Novel Inorganic Orange Pigments Based on BiFeWO6

    Akari Takemura, Yusuke Shobu, Ryohei Oka, Toshiyuki Masui

    The 36th International Japan-Korea Seminar on Ceramics (JK-Ceramics 36)  (Tottori)  2019.11  -  2019.11 

  • Novel Inorganic Black Pigments Based on Ca2MnO4 for High Near-Infrared Reflectance

    Ryohei Oka, Senri Iwasaki, Toshiyuki Masui

    The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13)  (Okinawa)  2019.10  -  2019.11 

  • Synthesis and Color Evaluation of Ta5+-doped Bi2O3

    Yusuke Shobu, Ryohei Oka, Toshiyuki Masui

    The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13)  (Okinawa)  2019.10  -  2019.11 

  • Novel Inorganic Orange Pigments Based on BiFeWO6

    Akari Takemura, Yusuke Shobu, Ryohei Oka, Toshiyuki Masui

    The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13)  (Okinawa)  2019.10  -  2019.11 

  • Synthesis and Characterization of (Li1−xNax)2MnO3 as Environmentally Friendly Red Pigments

    Kohei Kusukami, Ryohei Oka, Toshiyuki Masui

    The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13)  (Okinawa)  2019.10  -  2019.11 

  • Novel Inorganic Pigments with Ce3+ as a Coloring Source

    Ryohei Oka, Yusuke Shobu, Fumiya Aoyama, Takashi Tsukimori, Toshiyuki Masui

    The 35th International Korea-Japan Seminar on Ceramics (K-J Ceramics 35)  (Gangneung (Korea))  2018.11  -  2018.11 

  • Novel Inorganic Orange Pigments Based on Ca14Al10Zn6O35

    Toshiyuki Masui, Ryohei Oka, Takashi Kosaya

    The 35th International Korea-Japan Seminar on Ceramics (K-J Ceramics 35)  (Gangneung (Korea))  2018.11  -  2018.11