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Development of high-capacitance dielectric nanocube textured ceramics by using opal-structure templates

Research Project

Project/Area Number 20K15039
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 26030:Composite materials and interfaces-related
Research InstitutionUniversity of Yamanashi

Principal Investigator

Ueno Shintaro  山梨大学, 大学院総合研究部, 准教授 (40647062)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywordsナノ結晶 / 誘電材料 / 形態制御 / ソルボサーマル法 / 複合材料 / コア-シェル構造 / 誘電体 / 水熱法 / 界面構造制御 / 溶液プロセス
Outline of Research at the Start

高度センシング・超高速大容量通信社会の未来に貢献可能な大容量セラミックコンデンサ材料を開発するために、2種類の誘電体ナノ結晶が方位を揃えて接合することで生じる歪んだ界面構造を効率的に利用することを提案する。本提案では、立方体形状の誘電体ナノ粒子であるナノキューブに予め歪んだ界面構造を導入しておき、この結晶を規則構造を有する膜上で向きを揃えて堆積させることで、コンデンサとしての高性能・高信頼性を両立できる緻密な複合セラミックス材料を作製する。またセラミックス試料を用いることで、界面構造や電気特性の評価がより精確に行えるため、次世代の誘電材料開発のために最適な界面構造の提案に繋がると考えている。

Outline of Final Research Achievements

The BaTiO3 (core)-KNbO3 (shell) composite nanocube particles, which are the building blocks of high-capacity composite dielectric ceramics, were prepared by epitaxial growth of KNbO3 shell layers on uniform BaTiO3 nanocubes under the optimal solvothermal conditions. These BaTiO3-KNbO3 nanocube assemblies, which were prepared on the opal-structured films by the simple precipitation, showed the partial crystallographic orientation, though the aggregation of nanocubes prevented the formation of highly-oriented assemblies. Therefore, the BaTiO3-KNbO3 composite nanocubes were assembled by the more promising technique utilizing phase-separation of liquids, and the high relative-density assemblies (>75%) could be obtained. Moreover, it was found that the dielectric constant of the BaTiO3-KNbO3 composite nanocube assembly was more than twice that of the BaTiO3 nanocube assembly.

Academic Significance and Societal Importance of the Research Achievements

当該研究課題は新規大容量セラミックキャパシタ材料を開発することであり、既存の高比誘電率材料がエピタキシャル界面を介して接合したBaTiO3 (core)-KNbO3 (shell)複合ナノキューブの合成法を実現し、そのエピタキシャル界面で高い誘電特性が発現することを明らかにした。また新たに確立した相分離による集積法は、これまでにない高い相対密度の集積体の作製を可能とし、常温下で緻密なセラミックスの作製に繋がる成果が得られた。もしこの低温緻密化技術が発展すれば、セラミックス産業における大規模な省エネルギー化や低炭素化に貢献できるものと考える。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (13 results)

All 2023 2022 2021 2020 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results) Remarks (1 results)

  • [Journal Article] Solvothermal Synthesis of Dispersible Homogeneous KNbO3 Nanocubes from K4Nb6O17 Microsheets2023

    • Author(s)
      Yuma Yamada, Piyush Sapkota, Hyunwook Nam, Erika Yamaga, Ryoichi Kunisada, Takahiro Takei, Nobuhiro Kumada, Ichiro Fujii, Satoshi Wada and Shintaro Ueno
    • Journal Title

      Journal of the Ceramic Society of Japan

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] Solvothermal Synthesis of Uniform Perovskite-type Oxide Nanocubes for Nanocube-assembly Dielectrics2022

    • Author(s)
      Shintaro Ueno, Mutsuki Watanabe, Sakuya Hatakeyama, Yuma Yamada, Nanami Noritake, Hyunwook Nam, Piyush Sapkota, Ichiro Fujii, Satoshi Wada
    • Organizer
      15th International Symposium on Ferroic Domains & Micro- to Nano-scopic Structures (ISFD-15)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ソルボサーマル法による BaTiO3ナノキューブ粒子の粒径制御と複合誘電材料作製手法の検討2022

    • Author(s)
      上野慎太郎、清水陽向、Nam Hyunwook、Sapkota Piyush、則武七海、藤井一郎、和田智志
    • Organizer
      第35回日本セラミックス協会秋季シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Solvothermal Synthesis of Perovskite Alkaline-Niobates Nanocubes from Tailored Precursors for High-Performance Composite Dielectrics2022

    • Author(s)
      Shintaro Ueno, Yuma Yamada, Piyush Sapkota, Hyunwook Nam, Ichiro Fujii, Satoshi Wada
    • Organizer
      2022 U.S.-JAPAN SEMINAR ON DIELECTRIC AND PIEZOELECTRIC CERAMICS
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 層状ニオブ酸塩K4Nb6O17 を原料とする高分散KNbO3ナノキューブ粒子のソルボサーマル合成2021

    • Author(s)
      山田 湧麻, 上野 慎太郎, 藤井 一郎, 和田 智志
    • Organizer
      日本セラミックス協会第34回秋季シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] Ti源の反応性の違いを利用した3次元規則集積に適した形態を有するBaTiO3ナノキューブ合成の検討2021

    • Author(s)
      清水 陽向, 上野 慎太郎, 藤井 一郎, 和田 智志
    • Organizer
      日本セラミックス協会第34回秋季シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] ソルボサーマル固化法を用いた BaTiO3系複合誘電セラミックスの低温作製に関する検討2021

    • Author(s)
      上野 慎太郎, 服部 雅輝, 三澤 克也, 村上 涼子, 藤井 一郎, 和田 智志
    • Organizer
      日本セラミックス協会第34回秋季シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Solvothermal Synthesis of Dispersible KNbO3 Nanocubes from K4Nb6O17 Precursor Particles2021

    • Author(s)
      S. Ueno, Y. Yamada, I. Fujii, S. Wada
    • Organizer
      14th Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 14)
    • Related Report
      2021 Research-status Report
  • [Presentation] Low-temperature Wet Chemical Processes for Barium-Titanate-related Dielectric Ceramics and Dielectric Composites2021

    • Author(s)
      S. Ueno, I. Fujii, S. Wada
    • Organizer
      14th Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 14)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Low-temperature Wet Chemical Processes for Barium-Titanate-related Dielectric Ceramics and Dielectric Composites2021

    • Author(s)
      Shintaro Ueno, Ichiro Fujii, and Satoshi Wada
    • Organizer
      PACRIM 14
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Solvothermal Synthesis of Dispersible KNbO3 Nanocubes from K4Nb6O17 Precursor Particles2021

    • Author(s)
      Shintaro Ueno, Yuma Yamada, Ichiro Fujii, and Satoshi Wada
    • Organizer
      PACRIM 14
    • Related Report
      2020 Research-status Report
  • [Presentation] 誘電体ナノキューブ集積体の作製法の検討およびその誘電特性2020

    • Author(s)
      上野慎太郎、畠山朔弥、長田和希、藤井一郎、和田智志
    • Organizer
      第81回応用物理学会秋季講演会
    • Related Report
      2020 Research-status Report
  • [Remarks] ユビキタスナノ材料創成研究室 Ueno Laboratory

    • URL

      https://www.ccn.yamanashi.ac.jp/~sueno/index.html

    • Related Report
      2022 Annual Research Report 2021 Research-status Report 2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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