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2003 Fiscal Year Final Research Report Summary

Reasearch and Development on Ferroelectric Domain Controlled Ceramics

Research Project

Project/Area Number 12650327
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Electronic materials/Electric materials
Research InstitutionShizuoka Institute of Science and Technology

Principal Investigator

OGAWA Toshio  Shizuoka Institute of Science and Technology, Science and Technology, Professor, 理工学部, 教授 (40247573)

Project Period (FY) 2000 – 2003
Keywordsferroelectric Domain / Poling Field Dependence / Domain Switching / Domain Rotation / head Free Piezoelectric Ceramics / Domain Control / Pb[(Zn<1 / 3>Nb_<2 / 3>)_<0.91>Ti_<0.09>O_3 Single Crystal / Giant Electromechanical Coupling Factor of K_<31> Mode
Research Abstract

(1)Domain behavior of ferroelectric materials was investigated by a poling field (E). Ferroelectric materials evaluated consist of lead zirconate titanate (PZT), lead titanate (PT), barium titanate (BT), Bi-layer structured SrBi_4Ti_4O_<15> (SBT) ceramics and Pb(Zn<1/3>Nb_<2/3>)_<0.91>Ti_<0.09>O_3 (PZNT91/09) single crystal. Changing the poling field (E) from 0→+E→0→E→0 to +E, the electromechanical coupling factor (k), dielectric constant (εr) and frequency constant (fc) were measured. The minimum k and εr were obtained at the same E because of the 180゜ domain clamping. The E due to the domain clamping corresponded to the coercive field (Ec) determined by the poling field dependences. At the Ec, maximum fc was confirmed in the cases of soft PZT (tetragonal and rhombohedral), hard PZT (tetragonal), BT ceramics and PZNT91/09 single crystal. It was thought that the materials became mechanically hard by the electrical attracting through the domain clamping. In hard PZT (rhombohedral), PT, BT and SBT ceramics, the peak of εr and minimum fc were observed at an E, which corresponds to the threshold of domain rotations. At the E, the ceramics become mechanically soft because of the domain rotations.
(2)The giant electromechanical coupling factor of k_<31> mode over 80% had been found by realizing the mono-domain in the case of PZNT91/09 single crystal plates. From the investigation of the fc which corresponds to a half of the bulk wave velocity, the giant k_<31> appeared in the case of the phase with low crystal symmetry in comparison with tetragonal phase.
(3)Piezoelectric bimorphs were prepared to utilize the giant k_<31>. The PZNT91/09 single crystal bimorph showed the superior piezoelectric properties such as three orders of magnitude larger than the PZT ceramic bimorph regarding the impedance ratio on the resonant and the anti-resonant frequencies.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] T.Ogawa: "Ferroelectric Domain Structures in Lead Free Piezoelectric Ceramics Composed of Bi-Layer Structured SrBi_4Ti_4O_<15>"J. the European Ceramic Society. 24. 1517-1520 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Oagawa: "Domain Behavior by Electric Field in Ferroelectric Ceramics and Single Crystals"Advances in Science and Technology. Part D. 607-613 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ogawa, Y.Numamoto: "Origin of Giant Electromechanical Coupling Factor of k_<31> Mode and Piezoelectric d_<31> Constant in Pb[(Zn_<1/3>Nb_<2/3>)_<0.91>Ti_<0.09>]O_3 Single Crystal"Jpn.J.Appl.Phys.. 41,No.11B. 7108-7112 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ogawa, Y.Yamauchi, Y.Numamoto, M.Matsushita, Y.Tachi: "Giant Electromechanical Coupling Factor of k_<31> Mode and Piezoelectric d_<31> Constant in Pb[(Zn_<1/3>Nb_<2/3>)_<0.91>Ti_<0.09>]O_3 Piezoelectric Single Crystal"Jpn.J.Appl.Phys.. 41,Part2. L55-L57 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ogawa: "Poling Field Dependence of Ferroelectric Properties in Barium Titanate Ceramics"Jpn.J.Appl.Phys.. 40,No.9B. 5630-5633 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ogawa: "Poling Field Dependence of Crystal Orientation and Ferroelectric Properties in Lead Titanate Ceramics"Jpn.J.Appl.Phys.. 39,No.9B. 5538-5541 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Ogawa: "Ferroelectric Domain Structures in Lead Free Piezoelectric Ceramics Composed of Bi-Layer Structured SrBi_4Ti_4O_<15>"J. the European Ceramic Society. 24. 1517-1520 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ogawa: "Domain Behavior by Electric Field in Ferroelectric Ceramics and Single Crystals"Advances in Science and Technology. Part D. 607-613 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ogawa, Y.Numamoto: "Origin of Giant Electromechanical Coupling Factor of k_<31> Mode and Piezoelectric d_<31> Constant in Pb[(Zn_<1/3>Nb_<2/3>)_<0.91>Ti_<0.09>]O_3 Single Crystal"Jpn. J. Appl. Phys.. 41. 7108-7112 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ogawa, Y.Yamauchi, Y.Numamoto, M.Matsushita, Y.Tachi: "Giant Electromechanical Coupling Factor of k_<31> Mode and Piezoelectric d<31> Constant in Pb[(Zn_<1/3>Nb_<2/3>)_<0.91>Ti_<0.09>]O_3 Piezoelectric Single Crystal"Jpn. J. Appl. Phys.. 41. L55-L57 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ogawa: "Poling Field Dependence of Ferroelectric Properties in Barium Titanate Ceramics"Jpn. J. Appl. Phys.. 40. 5630-5633 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ogawa: "Poling Field Dependence of Crystal Orientation and Ferroelectric Properties in Lead Titanate Ceramics"Jpn. J. Appl. Phys.. 39. 5538-5541 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ogawa: "Piezoelectric Devices"Toku Negai 2003-433017 (December 26, 2003).. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Ogawa, M.Matsushita, Y.Tachi: "Domain Controlled Piezoelectric Single Crystal Elements and their Fabrication Method"Toku Negai 2002-083702 (March 25, 2002).. (2002)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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