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Material Design for Microwave Dielectric Perovskites Based on Substitution by Isomorphous Ions

Research Project

Project/Area Number 18560660
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Inorganic materials/Physical properties
Research InstitutionKanagawa Institute of Technology

Principal Investigator

IKAWA Hiroyuki  Kanagawa Institute of Technology, 工学部, 教授 (30016612)

Co-Investigator(Kenkyū-buntansha) TAKEMOTO Minoru  神奈川工科大学, 工学部, 准教授 (70288215)
NAKANO Hiromi  龍谷大学, 理工学部, 実験講師 (00319500)
Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥4,000,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥600,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2006: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywords誘電体物性 / セラミックス / イオン置換 / ペロブスカイト酸化物 / 常誘電性 / 誘電率 / 誘電損失 / 移動体通信 / イオン結晶 / 格子欠陥 / 焼結体微細組織
Research Abstract

本研究では3-1に示した9組成系のうち、主に(1)~(6)の6系につき検討した。その結果、(Ba_<1-x>Ca_x)、(Ba_<1-x>Sr_x)、(Sr_<1-x>Ca_x)置換系の比誘電率とQfの組成変化について、また、比誘電率およびQfのNbあるいはTaを含む化合物間の大小関係など、代表者らが既に報告している傾向を確認した。これにより、マイクロ波誘電率、Qfならびに共振周波数温度係数について、ペロブスカイト酸化物のAサイトイオン置換による材質設計の指針を作ることができた。なお、Scを含む系にのみ見られる、未確認ながら全域固溶という、想像もできなかった事実をあきらかにした。また、(Ba_<1-x>Ca_x)(Sc_<1/2>Nb_<1/2>)O_3系では合成手法に敏感に影響されて生成物が変化する、さらにはxが0.44、0.47、0.50焼結体の微細構造が大きく異なるなど、これから解明すべき奇妙な現象に気付かされている。

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (14 results)

All 2009 2007 2006 2005

All Journal Article (9 results) (of which Peer Reviewed: 4 results) Presentation (5 results)

  • [Journal Article] In-situ observation of phase transformations in layered perovskite BaEu2Mn2O72009

    • Author(s)
      H. Nakano, N. Ishizawa and N. Kamegashira
    • Journal Title

      J. European Ceramic Society

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] "Oxygen-octahedral phonon properties of xBaTiO_3+(1-x)Ba(Mg_<1/3>Ta_<2/3>)O_3 and xCa(Sc_<1/2>Nb_<1/2>)O_3+(1-x)Ba(Sc_<1/2>Nb_<1/2>)O_3 microwave ceramics", Chih-Ta Chia2007

    • Author(s)
      Pi-Jung Chang, Mei-Yu Chen, I.-Nan Lin, H. Ikawa
    • Journal Title

      Journal of Appllied Physics 101

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] "Oxygen-Octahedral Phonon Properties of χ BaTiO_3+(1-χ)Ba(Mg_<1/3>Ta_<2/3>)O_3 and χ Ca(Sc_<1/2>Nb_<1/2>)O_3+(1-χ)Ba(Sc_<1/2>Nb_<1/2>)O_3Microwave Ceramics"2007

    • Author(s)
      C-T Chia, Pi-J Chang, M-Y Chen, I-N Lin, H Ikawa, L-J Lin
    • Journal Title

      Journal of Applied Physics 101

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Oxygen-Octahedral Phonon Properties of X BaTiO_3 + (1-x) Ba(Mg_<1/3>Ta_<2/3>)O_3 and x Ca(Sc_<1/2>Nb_<1/2>)O_3 + (1-x)Ba(Sc_<1/2>Nb_<1/2>)O_3 Microwave Ceramics2007

    • Author(s)
      C-T Chia, Pi-J Chang, M-Y Chen, I-N Lin, H Ikawa, L-J Lin
    • Journal Title

      Journal of Applied Physics 101(Submitted)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Phase Transformation of Barium Titanate Confirmed by Raman Spectroscopy and Powder X-ray Diffraction2006

    • Author(s)
      H. Ikawa, T. Nakai, S. Higuchi, K. Saitou, and M. Takemoto
    • Journal Title

      Trans. Mater. Res. Soc. Jpn. 31[1]

      Pages: 101-104

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Editorial2006

    • Author(s)
      H.Ikawa, H.Ohsato, M.T.Sebastian
    • Journal Title

      Journal of European Ceramic Society 26

      Pages: 1753-1754

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Products and Microwave Dielectric Properties of the (Ba_<1-x>Ca_x)(Sc_<1/2>Nb_<1/2>)O_3 System which has an Abnormally Wide Solid Solution Range2006

    • Author(s)
      H.Ikawa, Y.Fujii, M.Takemoto
    • Journal Title

      The Fourth International Conference on Microwave Materials and their Applications (MMA2006),Abstract Book

      Pages: 131-131

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Editorial2005

    • Author(s)
      H.Ikawa, H.Ohsato, M.T.Sebastian
    • Journal Title

      J. Eur. Ceram. Soc. 26(10-11)

      Pages: 1753-1754

    • Related Report
      2008 Final Research Report
  • [Journal Article] Products and Microwave Dielectric Properties and Abnormally Wide Solid Solution Range of the (Ba_<1-x>Ca_x)(Sc_<1/2>Nb_<1/2>)O_3 System2005

    • Author(s)
      Y.Fujii, M.Takemoto, M.Takayama, J.Katagiri, D.Satoh, R.Hirukawa, and H.Ikawa
    • Journal Title

      In Program Summary and Extended Abstract of The 12th US-Japan Seminar on Dielectric & Piezoelectric Ceramics

      Pages: 267-270

    • Related Report
      2008 Final Research Report
  • [Presentation] 異常に広い固溶域を持つ(Ba_<1-x>Ca_x)(Sc_<1/2>Nb_<1/2>)O_3系ペロブスカイトマイクロ波誘電体の奇妙な挙動2009

    • Author(s)
      井川博行、竹本稔
    • Organizer
      日本セラミックス協会2009年年会
    • Place of Presentation
      東京理科大学(野田キャンパス)
    • Year and Date
      2009-03-17
    • Related Report
      2008 Final Research Report
  • [Presentation] 異常に広い固溶域を持つ(Ba_<1-x>Ca_x)(Sc_<1/2>Nb_<1/2>)O_3系ペロブスガイトマイクロ波誘電体の奇妙な挙動2009

    • Author(s)
      井川博行, 竹本稔
    • Organizer
      日本セラミックス協会 2009年年会
    • Place of Presentation
      東京理科大学(野田キャンパス)
    • Year and Date
      2009-03-17
    • Related Report
      2008 Annual Research Report
  • [Presentation] Aサイト置換複合ペロブスカイトセラミックス(Ba_<1-x>Ca_x)(Sc_<1/2>Nb_<1/2>)O_3のマイクロ波誘電特性2006

    • Author(s)
      井川博行、藤井友也、竹本稔
    • Organizer
      日本セラミックス協会第19回秋季シンポジウム
    • Year and Date
      2006-09-21
    • Related Report
      2008 Final Research Report
  • [Presentation] Products and Microwave Dielectric Properties of the (Ba_<1-x>Ca_x)(Sc_<1/2>Nb_<1/2>)O_3 System which has an Abnormally Wide Solid Solution Range2006

    • Author(s)
      H.Ikawa, Y.Fujii, M.Takemoto
    • Organizer
      4^<th> Internal. Conf. Microwave Mater. Their Applica
    • Place of Presentation
      Oulu Finland
    • Related Report
      2008 Final Research Report
  • [Presentation] Interrelation between Dielectric Property and Elastic Property of Ceramics of Nominal Composition (Ba_<1-x>Ca_x)(Mg_<1/3>Ta_<2/3>)O_32005

    • Author(s)
      M.Yamashiro, M.Fukuhara, and M.Takemoto
    • Organizer
      The 12th US-Japan Seminar on Dielectric & Piezoelectric Ceramics
    • Place of Presentation
      Annapolys USA
    • Related Report
      2008 Final Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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