研究者詳細

顔写真

ササキ シユンタ
佐々木 俊太
Shunta Sasaki
所属
大学院工学研究科 応用物理学専攻 応用材料物理学講座(光機能材料物理学分野)
職名
助教
学位
  • 博士(工学)(弘前大学)

  • 修士(理工学)(弘前大学)

e-Rad 研究者番号
31004541

経歴 2

  • 2025年4月 ~ 継続中
    東北大学 大学院工学研究科 応用物理学専攻 助教

  • 2024年4月 ~ 2025年3月
    京都大学 大学院工学研究科 材料化学専攻 特定研究員

学歴 1

  • 弘前大学 大学院理工学研究科 機能創成科学専攻 博士後期課程

    2021年4月 ~ 2024年3月

受賞 1

  1. 21世記念個人冠賞倉田元治賞

    2025年6月 日本セラミックス協会

論文 11

  1. Crystallisation of levitated TeO2 glass

    Shunta Sasaki, Sae Munakata, Eriya Takahashi, Atsunobu Masuno, Joachim Deubener

    Acta Materialia 304 121784-121784 2026年1月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.actamat.2025.121784  

    ISSN:1359-6454

  2. Glass-forming ability of La2O3–Nb2O5 evaluated via thermophysical properties under microgravity 査読有り

    Atsunobu Masuno, Chihiro Koyama, Shinji Kohara, Shunta Sasaki, Satoshi Izumi, Tomoharu Matsuya, Yuki Mikami, Kenta Yoshida, Hirotaka Kobayashi, Yuki Watanabe, Akitoshi Mizuno, Hirohisa Oda, Yuta Shuseki, Manabu Watanabe, Junpei T. Okada, Takehiko Ishikawa

    npj Microgravity 11 (1) 2025年8月25日

    出版者・発行元: Springer Science and Business Media LLC

    DOI: 10.1038/s41526-025-00520-w  

    eISSN:2373-8065

    詳細を見る 詳細を閉じる

    Abstract The La2O3–Nb2O5 binary system is a unique glass-forming system without conventional network former oxides, exhibiting two distinct glass-forming regions: La2O3-rich and Nb2O5-rich compositions. To evaluate its glass-forming ability, the temperature dependence of density, viscosity, and surface tension was measured using the electrostatic levitation furnace aboard the International Space Station (ISS–ELF). Melt density showed linear temperature dependence, and thermal expansion coefficients at 2000 K varied from 2.5 × 10−5 to 4.0 × 10−5 K−1. Substantial undercooling was observed for glass-forming compositions. Viscosity measurements above the melting point revealed that both La2O3-rich and Nb2O5-rich melts behave as fragile liquids. Activation energy derived from viscosity data was higher for glass-forming compositions. These results suggest that glass-forming ability can be assessed based on undercooling and activation energy across a wide compositional range, including non-glass-forming melts. The ISS–ELF experiments provide a valuable platform for understanding glass formation in systems inaccessible by terrestrial techniques.

  3. Recalculation of dissociation energies for improved estimation of the mechanical properties of borate glasses modified by rare-earth oxides 査読有り

    Shunta Sasaki, Atsunobu Masuno, Yuji Higo

    Scripta Materialia 265 116747-116747 2025年8月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.scriptamat.2025.116747  

    ISSN:1359-6462

  4. Densely packed glass structure caused by seven-coordinated Zr in high elastic modulus Al2O3–SiO2–ZrO2 glasses 査読有り

    Atsunobu Masuno, Yuki Mikami, Yutaka Yanaba, Yuji Higo, Shunta Sasaki, Io Sato, Toyonari Yaji, Gustavo A. Rosales-Sosa, Hiroyuki Inoue

    Acta Materialia 283 120549-120549 2025年1月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.actamat.2024.120549  

    ISSN:1359-6454

  5. Survival of Fragmented BO4 Units in Highly Modified Rare-Earth-Rich Borate Glasses 査読有り

    Shunta Sasaki, Atsunobu Masuno, Yutaka Yanaba, Hiroyuki Inoue, Takahiro Ohkubo

    Inorganic Chemistry 63 (49) 23131-23140 2024年11月20日

    出版者・発行元: American Chemical Society (ACS)

    DOI: 10.1021/acs.inorgchem.4c03264  

    ISSN:0020-1669

    eISSN:1520-510X

  6. Ab Initio Molecular Dynamics Study of Trivalent Rare Earth Rich Borate Glasses: Structural Insights and Formation Mechanisms 査読有り

    Takahiro Ohkubo, Shunta Sasaki, Atsunobu Masuno, Eiji Tsuchida

    The Journal of Physical Chemistry B 128 (47) 11800-11813 2024年11月11日

    出版者・発行元: American Chemical Society (ACS)

    DOI: 10.1021/acs.jpcb.4c05039  

    ISSN:1520-6106

    eISSN:1520-5207

  7. Magneto‐optical effect of rare‐earth‐rich borate glasses prepared using a levitation technique 査読有り

    Shunta Sasaki, Katsuhisa Tanaka, Atsunobu Masuno

    Journal of the American Ceramic Society 107 (12) 8126-8131 2024年8月12日

    出版者・発行元: Wiley

    DOI: 10.1111/jace.20065  

    ISSN:0002-7820

    eISSN:1551-2916

    詳細を見る 詳細を閉じる

    Abstract The magneto‐optical properties of rare‐earth‐rich borate glasses prepared using a levitation technique were thoroughly investigated. Among the series of rare‐earth borate glasses, Tb2O3–B2O3 and Dy2O3–B2O3 glasses displayed remarkably large Faraday effects in the visible region. The Verdet constant of 58Tb2O3–42B2O3 reached −229 rad/T·m at 633 nm, surpassing the value of commercially available single‐crystalline Tb3Ga5O12. Compositions with a higher rare‐earth oxide content (60 mol%) than that of binary glasses facilitated the successful synthesis of Tb2O3–Dy2O3–B2O3 ternary glasses. The Verdet constant linearly increased with increasing Tb2O3 content for the glasses with 40 mol% B2O3. Results indicate that rare‐earth‐rich borate glasses are promising candidates for magneto‐optical applications in the visible region, and that the types and amounts of rare‐earth ion mainly affect these properties.

  8. Atomic and Electronic Structure in MgO–SiO2 査読有り

    Yuta Shuseki, Shinji Kohara, Tomoaki Kaneko, Keitaro Sodeyama, Yohei Onodera, Chihiro Koyama, Atsunobu Masuno, Shunta Sasaki, Shohei Hatano, Motoki Shiga, Ippei Obayashi, Yasuaki Hiraoka, Junpei T. Okada, Akitoshi Mizuno, Yuki Watanabe, Yui Nakata, Koji Ohara, Motohiko Murakami, Matthew G. Tucker, Marshall T. McDonnell, Hirohisa Oda, Takehiko Ishikawa

    The Journal of Physical Chemistry A 128 (4) 716-726 2024年1月18日

    出版者・発行元: American Chemical Society (ACS)

    DOI: 10.1021/acs.jpca.3c05561  

    ISSN:1089-5639

    eISSN:1520-5215

  9. Composition dependence of the local structure and transparency of Gd2O3–B2O3 binary glasses prepared via aerodynamic levitation 査読有り

    Shunta SASAKI, Atsunobu MASUNO

    Journal of the Ceramic Society of Japan 130 (1) 60-64 2022年1月1日

    出版者・発行元: Ceramic Society of Japan

    DOI: 10.2109/jcersj2.21124  

    ISSN:1882-0743

    eISSN:1348-6535

  10. Structural Origin of Additional Infrared Transparency and Enhanced Glass-Forming Ability in Rare-Earth-Rich Borate Glasses without B–O Networks 査読有り

    Shunta Sasaki, Atsunobu Masuno, Koji Ohara, Yutaka Yanaba, Hiroyuki Inoue, Yasuhiro Watanabe, Shinji Kohara

    Inorganic Chemistry 59 (19) 13942-13951 2020年8月24日

    出版者・発行元: American Chemical Society (ACS)

    DOI: 10.1021/acs.inorgchem.0c01567  

    ISSN:0020-1669

    eISSN:1520-510X

  11. High refractive index La-rich lanthanum borate glasses composed of isolated BO3 units 査読有り

    Atsunobu Masuno, Takashi Iwata, Yutaka Yanaba, Shunta Sasaki, Hiroyuki Inoue, Yasuhiro Watanabe

    Dalton Transactions 48 (29) 10804-10811 2019年

    出版者・発行元: Royal Society of Chemistry (RSC)

    DOI: 10.1039/c9dt01715a  

    ISSN:1477-9226

    eISSN:1477-9234

    詳細を見る 詳細を閉じる

    <p>The simple environment around the B atom in high refractive index La-rich La2O3–B2O3 glasses caused wide transmittance in the IR region.</p>

︎全件表示 ︎最初の5件までを表示

共同研究・競争的資金等の研究課題 1

  1. 修飾酸化物の高含有化がホウ酸ガラスに及ぼす影響の解明

    佐々木 俊太

    2024年7月31日 ~ 2026年3月31日