Details of the Researcher

PHOTO

Shunta Sasaki
Section
Graduate School of Engineering
Job title
Assistant Professor
e-Rad No.
31004541

Research History 2

  • 2025/04 - Present
    Tohoku University　Graduate School of Engineering Department of Applied Physics

  • 2024/04 - 2025/03
    Kyoto University　Graduate School of Engineering Department of Material Chemistry

Education 1

  • Hirosaki University　Graduate School of Science and Technology

    2021/04 - 2024/03

Awards 1

  1. 21世記念個人冠賞倉田元治賞

    2025/06　日本セラミックス協会

Papers 11

  1. Crystallisation of levitated TeO2 glass

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

    Acta Materialia　304　121784-121784　2026/01

    Publisher: 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 Peer-reviewed

    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)　2025/08/25

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41526-025-00520-w 　

    eISSN： 2373-8065

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    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 Peer-reviewed

    Shunta Sasaki, Atsunobu Masuno, Yuji Higo

    Scripta Materialia　265　116747-116747　2025/08

    Publisher: 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 Peer-reviewed

    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　2025/01

    Publisher: 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 Peer-reviewed

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

    Inorganic Chemistry　63　(49)　23131-23140　2024/11/20

    Publisher: 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 Peer-reviewed

    Takahiro Ohkubo, Shunta Sasaki, Atsunobu Masuno, Eiji Tsuchida

    The Journal of Physical Chemistry B　128　(47)　11800-11813　2024/11/11

    Publisher: 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 Peer-reviewed

    Shunta Sasaki, Katsuhisa Tanaka, Atsunobu Masuno

    Journal of the American Ceramic Society　107　(12)　8126-8131　2024/08/12

    Publisher: Wiley

    DOI： 10.1111/jace.20065 　

    ISSN： 0002-7820

    eISSN： 1551-2916

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    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 Peer-reviewed

    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　2024/01/18

    Publisher: 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 Peer-reviewed

    Shunta SASAKI, Atsunobu MASUNO

    Journal of the Ceramic Society of Japan　130　(1)　60-64　2022/01/01

    Publisher: 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 Peer-reviewed

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

    Inorganic Chemistry　59　(19)　13942-13951　2020/08/24

    Publisher: 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 Peer-reviewed

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

    Dalton Transactions　48　(29)　10804-10811　2019

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/c9dt01715a 　

    ISSN： 1477-9226

    eISSN： 1477-9234

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    <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>

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Research Projects 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

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 研究活動スタート支援

    Institution: 京都大学

    2024/07/31 - 2026/03/31