ナノドメインエンジニアリングによる環境調和型巨大圧電アクチュエータの開発

• Project/Area Number: 19016011
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: University of Yamanashi
• Principal Investigator: 和田 智志 University of Yamanashi, 大学院・医学工学総合研究部, 教授 (60240545)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥9,000,000 (Direct Cost: ¥9,000,000); Fiscal Year 2008: ¥4,500,000 (Direct Cost: ¥4,500,000); Fiscal Year 2007: ¥4,500,000 (Direct Cost: ¥4,500,000)
• Keywords: 配向セラミックス / 圧電定数 / エンジニアード・ドメイン構造 / ドメインサイズ / 振動子 / ドメイン壁 / TGG法 / テンプレート粒子

Research Abstract

本年度は、キュリー温度の高い新規非鉛系圧電材料の探索と、昨年度報告したチタン酸バリウム(BT)配向セラミックスの圧電定数の更なる向上について、研究開発を行った。その結果、まず、BTとニオブ酸カリウム(KN)の固溶体セラミックスについての研究からは、BT-KN系相図を新たに作製し、その結果、BTとKNが1:1の組成比において、正方晶構造と斜方晶構造からなる2相共存領域を初めて確認した。なお、この領域のキュリー温度は430℃と非常に高いことも明らかとなった。この組成での圧電定数は約20pC/Nと低いものの、2相界面の面積を出発原料にナノ粒子を用いることで制御した結果、2相界面面積の増加とともに圧電定数は単調に増加し、もとの5倍以上にまで増大することがわかった。今後さらなる増大が予測される。また、従来のBTセラミックスにマグネシウム酸チタン酸ビスマス(キュリー温度 : 700℃以上、BMT)を固溶したBT-BMT系セラミックスを初めて常圧で合成することに成功し、その結果、BTセラミックスのキュリー温度130℃を360℃まで増大できることを明らかにした。この結果、これまでの非鉛系圧電材料に2種類の新規圧電材料を加えることに成功した。最後に、BT配向セラミックスをTGG法で作製し、焼結条件に加え、テンプレート粒子/マトリックス粒子比、Ba/Ti比などをパラメータとし、グレインサイズ、配向度、密度の3つの微構造パラメータの圧電定数依存性を検討した結果、グレインサイズが小さく、配向度および密度が高いほど圧電定数が高くなることを明らかにした。最終的には圧電定数が1000pC/Nを超える圧電材料の作製に成功した。

Research Products

• [Journal Article] Domain Wall Engineering In Lead-Free Piezoelectric Grain-Oriented Ceramics (2008)
  • Author(s): S. Wada
  • Journal Title: Ferroelectrics 373 Pages: 11-21
  • Peer Reviewed
• [Journal Article] Preparation of Barium Titanate - Potassium Niobate Solid Solution System Ceramics and Their Piezoelectric Properties (2008)
  • Author(s): S. Wada
  • Journal Title: Japanese Journal of Applied Physics 47 Pages: 7678-7684
  • NAID: 130006976232
  • Peer Reviewed
• [Journal Article] Domain Wall Engineering in Lead-free Piezoelectric Materials (2008)
  • Author(s): S. Wada
  • Journal Title: Transactions of the Materials Research Society of Japan 33 Pages: 57-60
  • NAID: 130007809402
  • Peer Reviewed
• [Journal Article] Preparation of [110] Grain Oriented Barium Titanate Ceramics by Temp lated Grain Growth Method and Their Piezoelectric Properties (2007)
  • Author(s): S.Wada, K.Takeda, et. al.
  • Journal Title: Japanese Journal of Applied Physics 46 Pages: 7039-7043
  • Peer Reviewed
• [Journal Article] Noise Reduction of Microwave Dielectric Map using Fourier Analysis Refinement (2007)
  • Author(s): H.Kakemoto, T.Harigai, S.Wada, et. al.
  • Journal Title: Japanese Journal of Applied Physics 46 Pages: 7097-7100
  • Peer Reviewed
• [Journal Article] Domain Wall Engineering in Lead-Free Piezoelectric Crystals (2007)
  • Author(s): S.Wada, T.Muraishi, K.Yokoh, et. al.
  • Journal Title: Ferroelectrics 355 Pages: 37-49
  • Peer Reviewed
• [Journal Article] Preparation of [110] Grain Oriented Barium Titanate Ceramics by Templated Grain Growth Method and Their Piezoelectric Properties (2007)
  • Author(s): S.Wada, K.Takeda, et. al.
  • Journal Title: MHS2007&Micro-Nano COE Pages: 372-376
  • NAID: 130006973280
  • Peer Reviewed
• [Journal Article] Temperature dependence of dielectric permittivity of perovskite-type artificial superlattices (2007)
  • Author(s): H.Kinbara, T.Harigai, H.Kakemoto, S.Wada, et. al.
  • Journal Title: IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control 54 Pages: 2541-2547
  • Peer Reviewed
• [Journal Article] Crystal Growth of Lithium-doped Silver Niobate Single Crystals and Their Piezoelectric Properties (2007)
  • Author(s): S.Wada, A.Saito, T.Hoshina, H.Kakemoto, et. al.
  • Journal Title: Ferroelectrics 346 Pages: 64-71
  • Peer Reviewed
• [Journal Article] Domain Wall Engineering in Lead-Free Piezoelectric Crystals (2007)
  • Author(s): S.Wada, T.Muraishi, et. al.
  • Journal Title: Ferroelectrics 355 Pages: 37-49
  • Peer Reviewed
• [Journal Article] Preparation of Barium Titanate Crystals with Engineered Domain Configurations by using a New Poling Method with Both an Electric Field and a Uniaxial Stress Field and Their Piezoelectric Properties (2007)
  • Author(s): S.Wada, T.Muraishi, et. al.
  • Journal Title: Journal of the Korean Physical Society 51 Pages: 874-877
  • Peer Reviewed
• [Presentation] ナノクリスタルセラミックスコンソーシアムにおける挑戦その3 (2008)
  • Author(s): 和田智志
  • Organizer: 日本セラミックス協会2008年年会
  • Place of Presentation: 長岡
  • Year and Date: 2008-03-20
• [Presentation] Domain Wall Engineering in Lead-free Piezoelectric Materials (2008)
  • Author(s): S. Wada
  • Organizer: 9th European Conference on Applications of Polar Dielectrics
  • Place of Presentation: Roma, Italy
• [Presentation] チタン酸バリウムーニオブ酸カリウム系圧電セラミックスの作製とその圧電特性 (2008)
  • Author(s): 新田桃世・和田智志・田中大介・黒岩芳弘
  • Organizer: 日本セラミックス協会2008年年会
  • Place of Presentation: 長岡
• [Presentation] 鉛フリー高性能圧電体の開発動向 (2007)
  • Author(s): 和田智志
  • Organizer: 革新的環境調和型無機材料開発の最前線コース
  • Place of Presentation: 神奈川
  • Year and Date: 2007-11-29
• [Presentation] Preparation of [110] Grain Oriented Barium Titanate Ceramics by Templated Grain Growth Method and Their Piezoelectric Properties (2007)
  • Author(s): S.Wada, K.Takeda, T.Tsurumi, T.Kimura
  • Organizer: MHS2007&Micro-Nano COE
  • Place of Presentation: 名古屋
  • Year and Date: 2007-10-16
• [Presentation] Domain Engineering of Silver Lithium Niobate Single Crystals and Their Piezoelectric Properties (2007)
  • Author(s): S.Wada, K.Yokoh, T.Muraishi, T.Hoshina, et. al.
  • Organizer: The 2007 16th IEEE International Symposium on Applications of Ferroelectrics
  • Place of Presentation: 奈良
  • Year and Date: 2007-05-28
• [Presentation] Mesoscopic Complex-Structure Control for Property Enhancement in Perovskite Ferroelectrics (2007)
  • Author(s): S.Wada
  • Organizer: Masterial Science&Technology 2007 Conference
  • Place of Presentation: Detroit U.S.A.
• [Presentation] Preparation of [110] Grain Oriented Barium Titanate Ceramics by Templated Grain Growth Method (2007)
  • Author(s): S.Wada, K.Takeda, T.Tsurumi, T.Kimura
  • Organizer: the 24th International Japan-Korea Seminor on Ceremics
  • Place of Presentation: 神奈川
• [Presentation] Domain Wall Engineering in Lead-free Piezoelectric Materials (2007)
  • Author(s): S.Wada, H.Kakemoto, et. al.
  • Organizer: the 3rd International Conference of Electroceramics
  • Place of Presentation: Arusha Tanzania
• [Presentation] テンプレート粒子成長法による[110]配向チタン酸バリウムセラミックスの作製とその圧電特性 (2007)
  • Author(s): 和田智志, 武田浩太郎, 木村敏夫, 村石智光, 他
  • Organizer: 第24回強誘電体応用会議
  • Place of Presentation: 京都
• [Presentation] Preparation of [110] Grain Oriented Barium Titanate Ceramics by Templated Grain Growth Method (2007)
  • Author(s): S.Wada, K.Takeda, T.Tsurumi, T.Kimura
  • Organizer: the 24th International Japan-Korea Seminor on Ceremics
  • Place of Presentation: 静岡
• [Presentation] Preparation of [110] Grain Oriented Barium Titanate Ceramics by Templated Grain Growth Method and Their Piezoelectric Properties (2007)
  • Author(s): S.Wada, K.Takeda, T.Tsurumi, T.Kimura
  • Organizer: The 4th Public Symposium on Next-Genaration Actuators Leading Breakthroughs
  • Place of Presentation: 沖縄
• [Presentation] Preparation of [110] Grain Oriented Barium Titanate Ceramics by Templated Grain Growth Method and Their Piezoelectric (2007)
  • Author(s): S.Wada, K.Takeda, T.Muraishi, H.Kakemoto, et. al.
  • Organizer: Properties 13th US-Japan Seminar on Dielectric and Piezoelectric Ceramics
  • Place of Presentation: 淡路島
• [Presentation] Domain Wall Engineering in Lead-free Piezoelectric Materials (2007)
  • Author(s): S.Wada, K.Takeda, et. al.
  • Organizer: 18th MRS-J Academic Symposium
  • Place of Presentation: 東京
• [Presentation] Domain Wall Engineering in Lead-free Piezoelectric Materials (2007)
  • Author(s): S.Wada, K.Takeda, et. al.
  • Organizer: 2nd International Symposium Micro-and Nano-scale Domain Structuring in Ferroelectrics
  • Place of Presentation: Ekaterinburg,Russia
• [Presentation] Domain Wall Engineering in Lead-free Piezoelectric Materials (2007)
  • Author(s): S.Wada, H.Kakemoto, et. al.
  • Organizer: International Conference on Electroceramics
  • Place of Presentation: Arusha,Tanzania
• [Presentation] Domain Engineering of Ferroelectrics (2007)
  • Author(s): S.Wada
  • Organizer: ISAF2007
  • Place of Presentation: 奈良
• [Presentation] Domain Engineering of Silver Lithium Niobate Single Crystals and Their Piezoelectric Properties (2007)
  • Author(s): S.Wada, K.Yokoh, T.Muraishi, T.Hoshina, et. al.
  • Organizer: ISAF2007
  • Place of Presentation: 奈良
• [Book] Handbook of advanced dielectric piezoelectric and ferroelectric materials:Synthesis, properties and applications (2008)
  • Author(s): S.Wada(分担)
  • Total Pages: 1096
  • Publisher: Woodhead Publishing Limited
• [Book] 圧電材料の高性能化と先端応用技術 (2007)
  • Author(s): 和田智志(分担)
  • Total Pages: 508
  • Publisher: サイエンス&テクノロジー
• [Book] エレクトロニクス用セラミックスの製造プロセスと応用技術<大全集> (2007)
  • Author(s): 和田智志(分担)
  • Total Pages: 887
  • Publisher: 技術情報協会