Rchr
J-GLOBAL ID：202201016294821761
Update date: Apr. 09, 2024
Okawa Ayahisa
オオカワ アヤヒサ | Okawa Ayahisa
Affiliation and department：
Job title：
Assistant Professor
Research field (2)：
Material fabrication and microstructure control
, Inorganic compounds/materials chemistry
Research keywords (3)：
MAX phases
, MXene
, Rare earth
Research theme for competitive and other funds (5)：
- 2023 - 2026 Development of a highly efficient method of utilising dielectrics with smart pulse power supplies
- 2024 - 2026 非晶質希土類珪酸塩の相転移挙動と新亀裂修復メカニズム
- 2020 - 2025 Creation and construction of basic technologies of indium-free functional nanomaterials for smart windows
- 2023 - 2025 Development of Crack Healing Mechanism Pioneered by Metastable Phase Sintered Materials
- 2023 - Thermal property measurements and phase transition behavior of rare earth silicates for optimization of thermal spraying and heat treatment of environmental barrier coatings
Papers (15)：
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Yibei Xue, Lei Miao, Takuya Hasegawa, Ayahisa Okawa, Shunya Yoshino, Hideki Kato, Masato Kakihana, Shu Yin. Uncovering the distinctive phase transition characteristics and thermochromic performance of VO2 with different N-doping sites. Applied Surface Science. 2024. 657. 159779-159779
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Suzuka Noda, Takuya Hasegawa, Tomoyo Goto, Yasushi Sato, Ayahisa Okawa, Shu Yin. Acquisition of Emissive Single-Crystalline <i>A</i>Eu(MoO<sub>4</sub>)<sub>2</sub> (<i>A</i> = Na, K, Rb, and Cs) Double Molybdates by One-Pot Hydrothermal Synthesis: Relationship between Particle Morphology and Photoluminescence Properties. Crystal Growth & Design. 2024
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Son Thanh Nguyen, Ayashisa Okawa, Thi-Mai-Dung Do, Chu Minh Ngo, Tsuyoshi Takahashi, Tadachika Nakayama, Hisayuki Suematsu, Koichi Niihara. Self-healing ability and full strength recovery at medium temperatures of low content titanium carbide/alumina composites. Journal of the Ceramic Society of Japan. 2024. 132. 3. 85-92
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Taisei Hangai, Takuya Hasegawa, Jian Xu, Takayuki Nakanishi, Takashi Takeda, Kosuke Nakano, Kenta Hongo, Ryo Maezono, Tomoyo Goto, Yasushi Sato, et al. Key Role of Metal-to-Metal Charge Transfer Transition between Mo6+ and Bi3+ for Enhancement in NIR Luminescence of Gd2MoO6:Bi,Yb Nanophosphor. The Journal of Physical Chemistry C. 2024
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Takuya Hasegawa, Suzuka Noda, Wataru Hikita, Kenji Toda, Ayahisa Okawa, Shu Yin. Elucidation of Structural Features and Photoluminescence Properties for Hydrothermally-synthesized γ-KEu(MoO4)2 Microcrystal Phosphor with Metastable Orthorhombic Structure and Differences of Luminescence Properties by Structure Transition Due to Y3+-dilution. New Journal of Chemistry. 2024
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MISC (1)：
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Son Thanh Nguyen, Ayahisa Okawa, Hirokazu Iwasawa, Tadachika Nakayama, Hideki Hashimoto, Tohru Sekino, Hisayuki Suematsu, Koichi Niihara. Inside Front Cover. Advanced Materials Interfaces. 2021. 8. 22. 2170126-2170126
Books (1)：
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Development Trends of Smart Windows
2023 ISBN:9784781317465
Lectures and oral presentations (17)：
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Yb2Si2O7およびHo2Si2O7の高温火山灰腐食挙動の観察
(日本セラミックス協会 2024年年会 2024)
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Mechanical properties and self-healing mechanism of SiC dispersed Yb2Si2O7 composite
(48th International Conference and Expo on Advanced Ceramics and Composites (ICACC2024) 2024)
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Control of Surface Functional Groups and Room Temperature Gas Sensing Behavior of Nb2CTx
(The 37th International Korea-Japan Seminar on Ceramics (KJ-Ceramics 37) 2023)
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Control of gas sensing behavior based on various etching methods of MXene
(The 3rd USTB-TU Symposium 2023)
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Fabrication of rare earth silicate glasses and observation of phase transition behavior
(The Japan Society of Microgravity Application, The 35th Conference 2023)
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Education (4)：
- 2019 - 2022 Nagaoka University of Technology Graduate School of Engineering Department of Science of Technology Innovation
- 2018 - 2019 Nagaoka University of Technology Graduate School of Engineering Department of Mechanical Engineering
- 2016 - 2018 Nagaoka University of Technology Faculty of Engineering Mechanical Engineering
- 2011 - 2016 Tomakomai National College of Technology Mechanical Engineering
Professional career (3)：
- Doctor of engineering (Nagaoka University of Technology)
- Bachelor of engineering (Nagaoka University of Technology)
- Foundation degree (Tomakomai National College of Technology)
Work history (5)：
- 2022/10 - 現在 Tohoku University Institute of Multidisciplinary Research for Advanced Materials Center for Exploration of New Inorganic Materials Environmental Inorganic Materials Chemistry Assistant Professor
- 2020/02 - 2020/03 Friedrich-Alexander Universität Erlangen-Nürnberg Department of Materials Science and Engineering
- 2017/12 - 2018/02 Indira Gandhi Centre for Atomic Research Mechanical Metallurgy Division
- 2017/09 - 2017/11 Indian Institute of Technology Madras Department of Metallurgical and Materials Engineering
- 2017/02 - 2017/03 Indian Institute of Technology Madras Department of Metallurgical and Materials Engineering
Awards (6)：
Association Membership(s) (2)：
The Ceramic Society of Japan
, The American Ceramic Society
