欠陥誘起強誘電性による新規非鉛圧電セラミックスの開発

• Project/Area Number: 21246096
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: The University of Tokyo
• Principal Investigator: 野口 祐二 The University of Tokyo, 先端科学技術研究センター, 准教授 (60293255)
• Co-Investigator(Kenkyū-buntansha): 鈴木 真也 東京大学, 先端科学技術研究センター, 助教 (70396927)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥45,630,000 (Direct Cost: ¥35,100,000、Indirect Cost: ¥10,530,000); Fiscal Year 2011: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000); Fiscal Year 2010: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000); Fiscal Year 2009: ¥22,230,000 (Direct Cost: ¥17,100,000、Indirect Cost: ¥5,130,000)
• Keywords: 強誘電体 / ペロブスカイト / 単結晶 / セラミックス / ドメイン / 格子欠陥

Research Abstract

昨年度は、欠陥誘起強誘電性に立脚した強誘電体・圧電体の材料設計指針を確立して、BiFeO_3強誘電体結晶の完全分極反転に、世界で初めて成功した。今年度は、(1-χ)BiFeO_3-χ(Bi_0.5K_0.5)TiO_3固溶体単結晶およびセラミックスを対象として、各種解析・物性評価を行った。
X線回折では、菱面体晶(R3c)構造に由来するピークは、χ≦0.36で観測された。中性子回折では、χ=0.40、0.43、0.46においても、R3c造由来の回折ピークが観測された。0.40≦χ≦0.46の組成領域においても、R3c構造の相が存在することが示された。R3c相とP4mm相の二相混相を仮定したリートベルト解析により、回折データを非常に良く再現できた。の増加に伴い、R3c相のモル分率が減少する傾向が得られた(χ=0.30では83%、0.46では66%)。精密構造解析の結果から、優れた強誘電性を示すχ=0.40において、菱面体晶歪みを持つR3c相と、強誘電性歪みが非常に小さい相とが共存した構造をとっていることが明らかになった。結晶構造解析および電子線回折によるドメイン構造解析の結果から、R3c相と擬立方晶相とが共存して、微細なナノドメイン構造を形成していること、およびこのナノドメイン構造が、χ=0.40における優れた強誘電性・圧電性の起源であることが示された。
フラックス法および溶液引き上げ法により、(1-χ)BiFeO_3-χ(Bi_0.5K_0.5)TiO_3固溶体単結晶の育成に、世界で初めて成功した。高酸素圧下で育成した単結晶は、大気中で育成した単結晶よりもリーク電流が大幅に減少した。この結果から、高酸素圧下での単結晶の育成が、欠陥濃度の小さい高品質な結晶の育成に有効であることが明らかとなった。

Research Products

• [Journal Article] Enhanced piezoelectric properties in (Bi_<0.5>K_<0.5>)Tio_3-(Bi_<0.5>Na_<0.5>)TiO_3 ferroelectric single crystals (2011)
  • Author(s): A.Morishita
  • Journal Title: Journal of Applied Dielectrics Volume: 1 Pages: 63-69
  • Peer Reviewed
• [Journal Article] Polarization and Piezoelectric Properties of High Performance Bismuth Sodium Titanate Single Crystals Grown by High-Oxygen-Pressure Flux Method (2010)
  • Author(s): M.Suzuki
  • Journal Title: Japanese Journal of Applied Physics Volume: 49
  • Peer Reviewed
• [Journal Article] High-Performance Ferroelectric Bi_4Ti_3O_<12> Single Crystals Grown by Top-Seeded Solution Growth Method under High-Pressure Oxygen Atmosphere (2010)
  • Author(s): Y.Kitanaka
  • Journal Title: Japanese Journal of Applied Physics Volume: 49
  • Peer Reviewed
• [Journal Article] Ferroelectric Phase Transition and Photoinduced Cooperative Phenomena in Bi-Layered Perovskite Pb_2Bi_4Ti_<50>o_<18> Ceramics Studied by Brillouin Scattering (2010)
  • Author(s): M.Takesada
  • Journal Title: Japanese Journal of Applied Physics Volume: 49
  • Peer Reviewed
• [Journal Article] Structural and piezoelectric properties of high-density (Bi_<0.5>K_<0.5>)Tio_3-BiFeO_3 ceramics (2010)
  • Author(s): H.Matsuo
  • Journal Title: Journal of Applied Physics Volume: 108
  • Peer Reviewed
• [Journal Article] Defect control for polarization switching in BiFeO_3 single crystals (2010)
  • Author(s): Y.Chishima
  • Journal Title: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Volume: 57 Pages: 2233-2236
  • Peer Reviewed
• [Journal Article] Effect of Mn doping on the leakage current and polarization properties in K_<0.14>Na_<0.86>NbO_3 ferroelectric single crystals (2010)
  • Author(s): Y.Noguchi
  • Journal Title: Journal of Ceramic Society of Japan Volume: 118 Pages: 711-716
  • Peer Reviewed
• [Journal Article] Crystal growth and ferroelectric properties in Bi_<0.5>K_<0.5>TiO_3-Bi_<0.5>Na_<0.5>TiO_3 crystals (2010)
  • Author(s): A.MorishiTa
  • Journal Title: Key Engineering Materials Volume: 445 Pages: 7-10
  • Peer Reviewed
• [Journal Article] Materials design and characterization of(Bi_<1/2>Na_<1/2>)TiO_3-Bi(β', β")o_3 ceramics (2010)
  • Author(s): Y.Oshima
  • Journal Title: Key Engineering Materials Volume: 445 Pages: 59-62
  • Peer Reviewed
• [Journal Article] Oxygen-vacancy-induced 90°-domain clamping in ferroelectric Bi_4Ti_3O_<12> single crystals (2010)
  • Author(s): Yuuki Kitanaka, Yuji Noguchi, ら
  • Journal Title: Physical Review B 81
  • Peer Reviewed
• [Journal Article] Electric-field-induced giant strain in Bi_<0.5>Na_<0.5>TiO_3-based single crystals : Influence of high-oxygen-pressure annealing (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Journal of Ceramic Society of Japan 117 Pages: 32-36
  • Peer Reviewed
• [Journal Article] Crystal Structure and Polarization Properties of Ferroelectric Bi_<4-χ>La_χTi_3O_<12> Single Crystals (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Journal of the Korean Physical Society 55 Pages: 862-868
  • Peer Reviewed
• [Journal Article] CORRELATION BETWEEN LOCAL STRUCTURES AND PARTIAL ELECTRONIC BAND STATES IN FERROELECTRIC Bi_<4-χ>La_χTi_3O_<12> ; 0.0=χ=1.46 (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: The Journal of Ceramics-Silikaty 53 Pages: 118-127
  • Peer Reviewed
• [Journal Article] Observation of octahedral tilted in Sr_<0.5>TaO_3 prepared by nanosheet processing : An EXAFS study (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Journal of Alloys and Compounds 486 Pages: 78-82
  • Peer Reviewed
• [Journal Article] Ferroelectric Properties and Nano-Scaled Domain Structures in(1-χ)BiFeO_<3-χ>Ba TiO_3(0.33<χ<0.50) (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Ferroelectrics 385 Pages: 155-161
  • Peer Reviewed
• [Journal Article] Charge Density Distributions in Bi_4Ti_3O_<12> and Bi_<3.25>La_<0.75>Ti_3O_<12> in the Paraelectric Phase (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Journal of the Korean Physical Society 55 Pages: 794-798
  • Peer Reviewed
• [Journal Article] Grain-orientation control of Bi_5FeTi_3O_<15> ceramics prepared by magnetic-field-assisted electrophoretic deposition method (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Key Engineering Materials 388 Pages: 205-208
  • Peer Reviewed
• [Journal Article] Crystal growth and ferroelectric properties of superlattice-structured Bi_4Ti_3O_<12>-PbBi_4Ti_4O_<15> single crystals (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Key Engineering Materials 388 Pages: 237-240
  • Peer Reviewed
• [Journal Article] Crystal growth and ferroelectric Properties in Bi_<0.5>Na_<0.5>TiO_3-BaTiO_3 crystals (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Key Engineering Materials 388 Pages: 241-244
  • Peer Reviewed
• [Journal Article] Behaviors of 90゜ and 180゜ Domain Walls under c-axis Polarization Switching in Ferroelectric Bi_4Ti_3O_<12> single crystals (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Transactions of the Materials Research Society of Japan 34 Pages: 27-30
  • Peer Reviewed
• [Journal Article] Polarization and Piezoelectric Properties of High-Quality(Bi, Na)TiO_3 crystals grown by high-oxygen-pressure flux method (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Transactions of the Materials Research Society of Japan 34 Pages: 31-34
  • Peer Reviewed
• [Journal Article] Nano-sized Domain Structures in the Pseudocubic Phase of(1-χ)BiFeO_<3-χ>BaTiO_3 (0.33<χ<0.60) (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Transactions of the Materials Research Society of Japan 34 Pages: 47-50
  • Peer Reviewed
• [Journal Article] Crystal growth and ferroelectric properties in Bi_<0.5>K_<0.5>TiO_3-Bi_<0.5>Na_<0.5>TiO_3 crystals (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Key Engineering Materials 445 Pages: 7-10
  • Peer Reviewed
• [Journal Article] Materials design and characterization of(Bi_<1/2>Na_<1/2>)TiO_3-Bi (B^', B^")O_3 ceramics (2009)
  • Author(s): Yuji Noguchi, ら
  • Journal Title: Key Engineering Material 445 Pages: 59-62
  • Peer Reviewed
• [Presentation] Relaxor behavior and piezoelectric properties of(Bi0.5K0.5)TiO3-BiFeO3 ceramics (2011)
  • Author(s): Y.Noguchi
  • Organizer: International Conference on Frustration in Condensed Matter
  • Place of Presentation: Sendai International Center (Miyagi, Japan)
  • Year and Date: 2011-01-11
• [Presentation] Multiferroic properties and related microstructures (2011)
  • Author(s): Y.Noguchi
  • Organizer: International Conference on Frustration in Condensed Matter
  • Place of Presentation: Sendai International Center (Miyagi, Japan)
  • Year and Date: 2011-01-11
• [Presentation] (Bi_<0.5>K_<0.5>)TiO_3-BiFeO_3における強誘電性に関係した微細構造 (2010)
  • Author(s): 尾崎友厚
  • Organizer: 第20回日本MRS学術シンポジウム
  • Place of Presentation: 横浜市開港記念会館(神奈川県)
  • Year and Date: 2010-12-20
• [Presentation] TSSG(溶液引き上げ法)で育成した(Bi_<0.5>Na_<0.5>)TiO_3単結晶の育成と特性評価 (2010)
  • Author(s): 矢内剣
  • Organizer: 第20回日本MRS学術シンポジウム
  • Place of Presentation: 横浜市開港記念会館(神奈川県)
  • Year and Date: 2010-12-20
• [Presentation] 高圧酸素下溶液引き上げ法による(Bi_<0.5>Na_<0.5>)TiO_3系単結晶の育成と特性評価 (2010)
  • Author(s): 小野塚博暁
  • Organizer: 第20回日本MRS学術シンポジウム
  • Place of Presentation: 横浜市開港記念会館(神奈川県)
  • Year and Date: 2010-12-20
• [Presentation] 高圧酸素下で育成された(Bi_<0.5>K_<0.5>)TiO_3-(Bi_<0.5>Na_<0.5>)TiO_3単結晶の強誘電・圧電特性 (2010)
  • Author(s): 森下瑛文
  • Organizer: 第20回日本MRS学術シンポジウム
  • Place of Presentation: 横浜市開港記念会館(神奈川県)
  • Year and Date: 2010-12-20
• [Presentation] 高圧酸素下フラックス法によるニオブ酸カリウムナトリウムの結晶育成とその物性評価 (2010)
  • Author(s): 服部拓也
  • Organizer: 第20回日本MRS学術シンポジウム
  • Place of Presentation: 横浜市開港記念会館(神奈川県)
  • Year and Date: 2010-12-20
• [Presentation] Bi-based ferroelectric single crystals growth by high-oxygen-pressuretop-speed solution growth method (2010)
  • Author(s): Y.Noguchi
  • Organizer: ICC 3rd International Congress on Ceramics
  • Place of Presentation: Osaka International Convention Center (Osaka, Japan)
  • Year and Date: 2010-11-17
• [Presentation] 高品質チタン酸ビスマスナトリウム単結晶の電界誘起歪特性 (2010)
  • Author(s): 鈴木宗泰
  • Organizer: 第30回エレクトロセラミックス研究討論会
  • Place of Presentation: 東京理科大学(東京都)
  • Year and Date: 2010-10-29
• [Presentation] Bi系強誘電体結晶における格子欠陥とドメインクランピング (2010)
  • Author(s): 北中佑樹
  • Organizer: 第30回エレクトロセラミックス研究討論会
  • Place of Presentation: 東京理科大学(東京都)
  • Year and Date: 2010-10-29
• [Presentation] 欠陥制御を施した(Bi_<0.5>K_<0.5>)TiO_3-BiFeO_3強誘電体単結晶の育成と特性評価 (2010)
  • Author(s): 松尾拓紀
  • Organizer: 第20回日本MRS学術シンポジウム
  • Place of Presentation: 横浜市開港記念会館(神奈川県)
  • Year and Date: 2010-10-20
• [Presentation] High-performance Bi-based ferroelectric single crystals growth by high-oxygen-pressure top-speed solution growth method (2010)
  • Author(s): Y.Noguchi
  • Organizer: 17th International Conference on Oxide Electronics
  • Place of Presentation: Awaji Yumebutai International Conference Center (Hyogo, Japan)
  • Year and Date: 2010-09-21
• [Presentation] 高品質Bi_4Ti_3O_<12>強誘電体単結晶の圧電特性評価 (2010)
  • Author(s): 北中祐樹
  • Organizer: 第71回応用物理学会学術講演会
  • Place of Presentation: 長崎大学(長崎県)
  • Year and Date: 2010-09-14
• [Presentation] 高圧酸素下溶液引き上げ法による(Bi_<0.5>Na_<0.5>)TiO_3-BaTiO_3単結晶の育成と物性評価 (2010)
  • Author(s): 小野塚博暁
  • Organizer: 第71回応用物理学会学術講演会
  • Place of Presentation: 長崎大学(長崎県)
  • Year and Date: 2010-09-14
• [Presentation] Growth and characterization of high-quality Bi-based perovskite ferroelectric single crystals (2010)
  • Author(s): Y.Noguchi
  • Organizer: 19th International Symposium on the Applications of Ferroelectrics-10th European Conference on the Applications of Polar Dielectrics
  • Place of Presentation: Edinburgh Conference Center (Edinburgh, UK)
  • Year and Date: 2010-08-12
• [Presentation] Dielectric Properties and Related Microstructures in (1-χ)BiFeO_3-χBaTiO3 (2010)
  • Author(s): Tomoatsu Ozaki
  • Organizer: The 8th Japan-Korea Conference on Ferroelectrics
  • Place of Presentation: Eglet Himeji(Hyogo, Japan)
  • Year and Date: 2010-08-03
• [Presentation] High-Quality Single Crystals of Bi-Based Ferroelectrics Obtained by Top-Seeded Solution Growth Method (2010)
  • Author(s): Yuuki Kitanaka
  • Organizer: The 8th Japan-Korea Conference on Ferroelectrics
  • Place of Presentation: Eglet Himeji(Hyogo, Japan)
  • Year and Date: 2010-08-03
• [Presentation] 欠陥エンジニアリングによる非鉛強誘電体単結晶の超高性能化 (2010)
  • Author(s): Y.Noguchi
  • Organizer: 2010 旭硝子財団 助成研究発表会
  • Place of Presentation: 東京
  • Year and Date: 2010-07-21
• [Presentation] Structural and piezoelectric properties of high-density (Bi_<0.5>K_<0.5>)TiO_3-BiFeO_3 ceramits (2010)
  • Author(s): H.Matsuo
  • Organizer: The 7th Asian Meeting on Ferroelectricity and 7th Asian Meeting on ElectroCeramic
  • Place of Presentation: Ramada Plaza Hotel (Jeju, Korea)
  • Year and Date: 2010-06-28
• [Presentation] Growth and characterization of high-quality (Bi_<0.5>K_<0.5>)TiO_3-(Bi_<0.5>Na_<0.5>)TiO_3 ferroelectric single crystals (2010)
  • Author(s): A.Morishita
  • Organizer: The 7th Asian Meeting on Ferroelectricity and 7th Asian Meeting on ElectroCeramic
  • Place of Presentation: Ramada Plaza Hotel (Jeju, Korea)
  • Year and Date: 2010-06-28
• [Presentation] High-oxygen pressure crystal growth for Bi-based ferroelectric single Crystals (2010)
  • Author(s): Y.Noguchi
  • Organizer: the 10th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity
  • Place of Presentation: Tokyo Institute of Technology (Kanagawa, Japan)
  • Year and Date: 2010-06-23
• [Presentation] Large remanent polarization in BiFe03 based single crystals (2010)
  • Author(s): Y.Noguchi
  • Organizer: International Conference on Modern Materials & Technologies
  • Place of Presentation: Palazzo dei Congressi (Tuscary, Italy)
  • Year and Date: 2010-06-08
• [Presentation] 強誘電性Bi層状ペロブスカイトPb_2Bi_4Tt_5o_<18>の紫外光照射効果 (2010)
  • Author(s): 武貞正樹
  • Organizer: 第27回強誘電体応用会議
  • Place of Presentation: コープイン京都(京都府)
  • Year and Date: 2010-05-26
• [Presentation] (Bi_<0.5>K_<0.5>)TiO_3BiFeO_3におけるドメイン構造と分極ナノドメイン (2010)
  • Author(s): 尾崎友厚
  • Organizer: 第27回強誘電体応用会議
  • Place of Presentation: コープイン京都(京都府)
  • Year and Date: 2010-05-26
• [Presentation] 高圧酸素下溶液引き上げ法-高品質Bi系強誘電体単結晶の育成 (2010)
  • Author(s): 北中佑樹
  • Organizer: 第27回強誘電体応用会議
  • Place of Presentation: コープイン京都(京都府)
  • Year and Date: 2010-05-26
• [Presentation] (Bi_<0.5>K_<0.5>)TiO_3-(Bi_<0.5>Na_<0.5>)TiO_3単結晶の強誘電・圧電特性 (2010)
  • Author(s): 森下瑛文
  • Organizer: 第27回強誘電体応用会議
  • Place of Presentation: コープイン京都(京都府)
  • Year and Date: 2010-05-26
• [Presentation] BiFeO_3-(Bi_<0.5>K_<0.5>)TiO_3系固溶体セラミックスの強誘電・圧電特性 (2010)
  • Author(s): 松尾拓紀
  • Organizer: 粉体粉末冶金協会平成22年度春季大会
  • Place of Presentation: 早稲田大学国際会議場(東京都)
  • Year and Date: 2010-05-25
• [Presentation] High-quality Bi-based ferroelectric single crystals growth by High-Po2 TSSG method (2010)
  • Author(s): Y.Noguchi
  • Organizer: 2010 U.S.Navy Workshop on Accoustic Transduction Materials and Devices
  • Place of Presentation: The Penn Stater Conference Center Hotel (Pennsylvania, USA)
  • Year and Date: 2010-05-11
• [Presentation] High-oxygen Pressure Crystal Growth for High-Quality Bi-Based Perovskite Crystals (2010)
  • Author(s): Y.Noguchi
  • Organizer: 6th Internatinal Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies
  • Place of Presentation: OVTA(Chiba, Japan)
  • Year and Date: 2010-04-18
• [Presentation] Structural and Piezoelectric Properties of High-Density (Bi_<0.5>K_<0.5>)TiO_3-BiFcO_3 Ceramics (2010)
  • Author(s): Hiroki Matsuo
  • Organizer: 6th Internatinal Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies
  • Place of Presentation: OVTA(Chiba, Japan)
  • Year and Date: 2010-04-18
• [Presentation] polarization and Piezoelectric Properties of (Bi_<0.5>K_<0.5>)TiO_3-(Bi_<0.5>Na_<0.5>)TiO_3 Ferroelectric Single Crystals (2010)
  • Author(s): Akifumi Morishita
  • Organizer: 6th Internatinal Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies
  • Place of Presentation: OVTA(Chiba, Japan)
  • Year and Date: 2010-04-18
• [Presentation] Oxygen-Vacancy-Induced Domain Clamping and Polarization Properties in Bi-β ased Ferroelectrics (2010)
  • Author(s): Yuuki Kitanaka
  • Organizer: 6th Internatinal Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies
  • Place of Presentation: OVTA(Chiba, Japan)
  • Year and Date: 2010-04-18
• [Presentation] 新規ビスマス系強誘電体の材料設計と特性評価 (2010)
  • Organizer: 第1回MLFシンポジウム
  • Place of Presentation: いばらき量子ビーム研究センター(茨城県)
  • Year and Date: 2010-03-29
• [Presentation] High-performance Bi_4Ti_3O_<12> and(Bi_<0.5>Na_<0.5>)TiO_3 ferroelectric single crystals obtained by high-oxygen pressure crystal growth (2009)
  • Author(s): Yuji Noguchi
  • Organizer: Joint Symposium of International Workshop on Piezoelectric Materials and Applications in Actuators(IWPMA 2009)
  • Place of Presentation: 韓国済州島
  • Year and Date: 2009-11-09
• [Presentation] High-performance Bi4Ti3O12 and (Bi0.5Na0.5) TiO3 ferroelectric single crystals obtained by high-oxygen pressure crystal growth (2009)
  • Author(s): Yuji Noguchi
  • Organizer: International Workshop on Piezoelectric Materials and Applications in Actuators & International Symposium on Electroceramics 2009, ISE-CT-I-22
  • Place of Presentation: 韓国済州島
  • Year and Date: 2009-11-09
• [Presentation] Defect Control for High-performance K0.5Na0.5NbO3 Single Crystals (2009)
  • Author(s): Yuji Noguchi
  • Organizer: International Workshop on Piezoelectric Materials and Applications in Actuators & International Symposium on Electroceramics 2009, ISE-CT-I-07
  • Place of Presentation: 韓国済州島
  • Year and Date: 2009-11-09
• [Presentation] Development of technology to prepare lead free ferroelectric materials (2009)
  • Author(s): Yuji Noguchi
  • Organizer: International Workshop on Piezoelectric Materials and Applications in Actuators & International Symposium on Electroceramics 2009, IWPMA-MA/TR-I-01
  • Place of Presentation: 韓国済州島
  • Year and Date: 2009-11-09
• [Presentation] High-performance Bi_4Ti_3O_<12> and(Bi_<0.5>Na_<0.5>)TiO_3 ferroelectric single crystals grown by high-oxygen-pressure flux method (2009)
  • Author(s): Yuji Noguchi
  • Organizer: Materials Science & Technology 2009
  • Place of Presentation: 米国ピッツバーグ
  • Year and Date: 2009-10-28
• [Presentation] Defect-induced polarization switching in BiFeO3 single crystals (2009)
  • Author(s): Yuji Noguchi
  • Organizer: IMF-ISAF-2009
  • Place of Presentation: 米国オレゴン
  • Year and Date: 2009-10-12
• [Presentation] Defect-induced polarization switching in BiFeO3 single crystals (2009)
  • Author(s): Yuji Noguchi
  • Organizer: IMF-ISAF-2009
  • Place of Presentation: 中国西安
  • Year and Date: 2009-08-25
• [Presentation] Defect-Induced Polarization Switching in PbTiO_3 and BiFeO_3 single crystals (2009)
  • Author(s): Yuji Noguchi
  • Organizer: 8th Pacific Rim Conference on ceramic and glass technology
  • Place of Presentation: カナダバンクーバー
  • Year and Date: 2009-06-03
• [Presentation] Polarization and piezoelectric properties of high-quality(Bi, Na)TiO3-based single crystals grown by high-oxygen-pressure flux method (2009)
  • Author(s): Yuji Noguchi
  • Organizer: 2009 US Navy Workshop
  • Place of Presentation: 米国ペンシルバニア
  • Year and Date: 2009-05-12
• [Presentation] Defect control for high-performance Bi_4Ti_3O_<12> and(Bi_<0.5>Na_<0.5>)TiO_3 ferroelectric single crystals (2009)
  • Author(s): Yuji Noguchi
  • Organizer: International Symposium on Core Technology in Ceramics(ISCTC)2009
  • Place of Presentation: 韓国ポハン
  • Year and Date: 2009-04-24
• [Book] Properties and Defect Control in Bismuth Layer Structured Ferroelectric Single crystals", Lead-Free Piezoelectrics Edited by : Shashank Priya and Sahn Nahm (2011)
  • Author(s): Y.Noguchi
  • Publisher: Springer-印刷中
• [Book] 「圧電材料(特集1:薄型化を支援する部品材料)」(分担執筆) (2009)
  • Author(s): 野口祐二, ら
  • Total Pages: 7
  • Publisher: テクノタイムス株式会社
• [Book] BiFeO_3単結晶における欠陥制御-欠陥誘起分極反転- (2009)
  • Author(s): 野口祐二, ら
  • Total Pages: 8
  • Publisher: 株式会社ティー・アイ・シィー
• [Patent(Industrial Property Rights)] セラミックス材料、及びキャパシタ (2010)
  • Inventor(s): 野口祐二, 宮山勝, 丸汎ラジェシュクマール, 杉山尚宏
  • Industrial Property Rights Holder: 国立大学法人東京大学, 株式会社デンソー
  • Filing Date: 2010-07-06
  • Overseas
• [Patent(Industrial Property Rights)] セラミックス材料、及びキャパシタ (2010)
  • Inventor(s): 野口祐二, 宮山勝, 丸汎ラジェシュクマール, 杉山尚宏
  • Industrial Property Rights Holder: 国立大学法人東京大学, 株式会社デンソー
  • Filing Date: 2010-07-06
  • Overseas
• [Patent(Industrial Property Rights)] セラミックス材料、及びキャパシタ (2010)
  • Inventor(s): 野口祐二, 宮山勝, 丸汎ラジェシュクマール, 杉山尚宏
  • Industrial Property Rights Holder: 国立大学法人東京大学, 株式会祉デンソー
  • Filing Date: 2010-07-06
• [Patent(Industrial Property Rights)] 圧電/電歪セラミックス、圧電/電歪セラミックスの製造方法、圧電/電歪素子及び圧電/電歪素子の製造方法 (2010)
  • Inventor(s): 野口祐二, 宮山勝, 柏屋俊克, 小泉貴昭, 田中立, 小澤修一
  • Industrial Property Rights Holder: 国立大学法人東京大学, 日本碍子株式会社
  • Filing Date: 2010-11-22
  • Overseas
• [Patent(Industrial Property Rights)] セラミックス材料,及びキャパシタ (2009)
  • Inventor(s): 東京大学, 他
  • Industrial Property Rights Holder: デンソー(株)
  • Filing Date: 2009-07-06