Development of Bi-based Piezoelectric Materials with High Tc and d33 by Nano-domain Engineering

• Project/Area Number: 17H03389
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: University of Yamanashi
• Principal Investigator: WADA Satoshi 山梨大学, 大学院総合研究部, 教授 (60240545)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000); Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2018: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000); Fiscal Year 2017: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
• Keywords: BT-BMT-BF系セラミックス / 圧電材料 / ナノドメインエンジニアリング / ナノドインエンジアリング / 高Tc / 高d定数 / ナノ／マクロ複合ドメイン構造 / 誘電・圧電特性 / 疑立方晶構造 / 誘電体物性 / 表面・界面物性 / ナノ材料 / 複合材料・物性 / 構造・機能材料

Outline of Final Research Achievements

In this study, BNT-BMT-BF ceramics were prepared by conventional sintering method with different starting materials and their chemical compositions, and then, their piezoelectric properties were measured to obtain the maximum piezoelectric properties. As the results, the ceramics with the chemical composition of 11BNT-23BT-2BMT-64BF showed the maximum piezoelectric properties.

Academic Significance and Societal Importance of the Research Achievements

本研究ではナノドメイン（10nm以下）をマトリックスとし、島状のマクロドメイン（200nm程度）をナノドメインマトリックス中に均一に分散させることで高いTC（450℃）と分極処理を満足しつつ、800pC/Nを超える高い圧電d33定数を有する巨大圧電材料を創成できた。この点に学術的な意義があると考えている。これにより環境に優しい発電・医療・ロボット用アクチュエータ等を実現でき、この点に社会的な意義があると考えている。

Research Products

• [Journal Article] Effect of A-site off-stoichiometry on ferroelectric and piezoelectric properties of BaTiO₃–Bi(Mg_1/2Ti_1/2)O₃–BiFeO₃ ceramics (2019)
  • Author(s): Hyunwook Nam, Ichiro Fujii, Sangwook Kim, Tomoya Aizawa, Shintaro Ueno, and Satoshi Wada
  • Journal Title: Journal of the Ceramic Society of Japan Volume: 127 Issue: 6 Pages: 369-373
  • DOI: 10.2109/jcersj2.19010
  • NAID: 130007658157
  • ISSN: 1348-6535, 1882-0743
  • Year and Date: 2019-06-01
  • Peer Reviewed
• [Journal Article] Effect of oxygen partial pressure during sintering on electric properties of BiFeO₃-based piezoelectric ceramics (2019)
  • Author(s): Tomoya Aizawa, Ichiro Fujii, Shintaro Ueno, Tohru S. Suzuki, and Satoshi Wada
  • Journal Title: Journal of the Ceramic Society of Japan Volume: 127 Issue: 6 Pages: 383-387
  • DOI: 10.2109/jcersj2.19001
  • NAID: 130007658161
  • ISSN: 1348-6535, 1882-0743
  • Year and Date: 2019-06-01
  • Peer Reviewed
• [Journal Article] Effects of AC- and DC-bias field poling on piezoelectric properties of Bi-based ceramics (2019)
  • Author(s): Sangwook Kim, Gopal Prasad Khanal, Hyunwook Nam, Ichiro Fujii, Shintaro Ueno, Satoshi Wada
  • Journal Title: Journal of the Ceramic Society of Japan Volume: 127 Issue: 6 Pages: 353-356
  • DOI: 10.2109/jcersj2.19002
  • NAID: 130007658156
  • ISSN: 1348-6535, 1882-0743
  • Year and Date: 2019-06-01
  • Peer Reviewed
• [Journal Article] Thermal annealing induced recovery of damaged surface layer for enhanced ferroelectricity in Bi-based ceramics (2019)
  • Author(s): Hyunwook Nam, Sangwook Kim, Gopal Prasad Khanal, Ichiro Fujii, Shintaro Ueno, and Satoshi Wada
  • Journal Title: Japanese Journal of Applied Physics Volume: 58
  • NAID: 210000156856
  • Peer Reviewed
• [Presentation] Development of BaTiO3-Bi(Mg1/2Ti1/2)O3-BiFeO3 ceramics by various ceramic processing for enhanced piezoelectric properties (2019)
  • Author(s): HyunWook Nam, Ichiro Fujii, Sangwook Kim, Tomoya Aizawa, Shintaro Ueno, Satoshi Wada
  • Organizer: 第66回応用物理学会春季学術講演会
• [Presentation] 圧電特性向上のための欠陥制御BiFeO3系セラミックスの開発 (2019)
  • Author(s): 相澤 朋弥、藤井 一郎、上野 慎太郎、鈴木 達、和田 智志
  • Organizer: 第66回応用物理学会春季学術講演会
• [Presentation] Development of Bi-based ceramics by various ceramic processing for enhanced piezoelectric properties (2019)
  • Author(s): H. Nam, I. Fujii, S. Kim, S. Ueno, and S. Wada
  • Organizer: Joint ISAF-ICE-EMF-IWPM-PFM meeting 2019
  • Int'l Joint Research
• [Presentation] Structural and Piezoelectric Properties of Lead-free Piezoelectric Ceramics in the BaTiO3-BiFeO3 (2019)
  • Author(s): H. Nam, I. Fujii, S. Kim, S. Ueno, and S. Wada
  • Organizer: Materials Research Meeting 2019
  • Int'l Joint Research
• [Presentation] Material design direction using materials softening for high performance piezoelectric ceramics (2019)
  • Author(s): Sangwook Kim, Gopal Prasad Khanal, Hyunwook Nam, Ichiro Fujii, Shintaro Ueno, Chikako Moriyoshi, Yoshihiro Kuroiwa, Satoshi Wada
  • Organizer: 第66回応用物理学会春季学術講演会
• [Presentation] Compositional dependence of piezoelectric and ferroelectric properties in Bi-based ceramics (2019)
  • Author(s): Hyunwook Nam, Ichiro Fujii, Sangwook Kim, Shintaro Ueno, Satoshi Wada
  • Organizer: 第39回電子材料研究討論会
• [Presentation] 高誘電率、DCバイアスフリー、温度依存性フリーな誘電体の材料設計の可能性 (2018)
  • Author(s): 和田智志
  • Organizer: 第28回日本MRS年次大会
• [Presentation] BiFeO3系圧電セラミックスの焼結条件の検討と物性評価 (2018)
  • Author(s): 相澤 朋弥、上野 慎太郎、藤井 一郎、和田 智志
  • Organizer: 第79回応用物理学会秋季学術講演会
• [Presentation] ＜110＞配向0.85(Bi0.5Na0.5)TiO3-0.15BaTiO3セラミックスにおける分極条件の最適化 (2018)
  • Author(s): 河地紘佑、藤井一郎、上野慎太郎、和田智志
  • Organizer: 日本セラミックス協会 第31回秋季シンポジウム
• [Presentation] Solvothermal Synthesis of Barium Titanate Nanocubes and Their Assembly (2018)
  • Author(s): 和田智志
  • Organizer: 第10回日中強誘電体応用会議
• [Remarks] 山梨大学 和田研究室
  • URL: http://www.ccn.yamanashi.ac.jp/~swada/lab/index.html
• [Remarks] 山梨大学 大学院 総合研究部 工学域 物質科学系（応用化学）
  • URL: http://nerdb-re.yamanashi.ac.jp/Profiles/337/0033646/profile.html
• [Remarks] 山梨大学Off-Gridマテリアルケミストリー研究ユニット
  • URL: http://www.ccn.yamanashi.ac.jp/~offgrid/index.html