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Preparation of microstructure-controlled high-performance lead-free piezoceramics

Research Project

Project/Area Number 16K06271
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Electronic materials/Electric materials
Research InstitutionToyama Prefectural University

Principal Investigator

KARAKI Tomoaki  富山県立大学, 工学部, 准教授 (10254236)

Co-Investigator(Kenkyū-buntansha) 藤井 正  富山県立大学, 工学部, 准教授 (90305483)
角田 龍則  富山県産業技術研究開発センター, その他部局等, 主任研究員 (20416150)
Research Collaborator YAMASHITA Yohachi  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords非鉛系圧電セラミックス / 配向セラミックス / 板状粉末 / 水熱合成 / ドクターブレード法 / シート成型 / 非鉛系圧電材料 / 板状テンプレート / テンプレート / マトリックス粉末 / 粒成長 / 焼結 / 非鉛系 / 圧電セラミックス / セラミックス
Outline of Final Research Achievements

After accurately controlling compounding ratio and procedure, plate-like NaNbO3 templates with 2000 nm thickness and 85% Lotgering factor of orientation in (001)pc were prepared by a hydrothermal and heating process. This template divided into small pieces at about 1040 oC, and then reacted with matrix powders and started densification process. After sintering at about 1170 oC for 5 h, the ceramics had the density of 4.48 g/cm3, Lotgering factor of 49%, and piezoelectric constant d33 of 347 pC/N.
The aim of this work, to manufacture lead-free piezoelectric ceramics with controlled microstructure (a) vertical MPB composition, (b) orientated piezoelectric axis, and (c) several micrometer grain size, was almost achieved. Because the Lotgering factor was lower than the expected value 80%, piezoelectric property of the ceramics increased only 22%. This is a future task to optimize the sintering process.

Academic Significance and Societal Importance of the Research Achievements

本研究では、非鉛系圧電セラミックスの性能を鉛系に匹敵またはそれ以上に向上させるためのトライとして、組成・配向・粒径という三つのキーポイントを最適化する可能性が見えてきた。新しい作製プロセスが成功すれば、学術的創新とともに、鉛による環境汚染の危険性を減らし、環境問題を重要視する社会的意義も大きいだろう。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] 中国科学院上海硅酸塩研究所(中国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] 西安交通大学(中国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Morphology control and phase transition of hexagonal sodium niobate particles2017

    • Author(s)
      Lu Yao、Karaki Tomoaki、Fujii Tadashi、Ido Yoshiaki、Li Yongxiang、Sakai Yuichi
    • Journal Title

      Ceramics International

      Volume: 43 Issue: 12 Pages: 9124-9127

    • DOI

      10.1016/j.ceramint.2017.04.060

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 粒子配向非鉛系圧電セラミックスの作製2019

    • Author(s)
      陸遥・唐木智明・安達正利
    • Organizer
      圧電材料・デバイスシンポジウム2019
    • Related Report
      2018 Annual Research Report
  • [Presentation] Study of fabricating orientated lead-free piezoceramics using plate-like powders2018

    • Author(s)
      Y. Ido, T. Nakamura, T. Karaki, T. Fujii
    • Organizer
      第10回日中強誘電体応用会議
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Morphology Control and Phase Transition of Hexagonal Sodium Niobate Particles2017

    • Author(s)
      Y. Lu, T. Karaki, Y. Idond,1 T. Fujii, Y. Li, and Y. Sakai
    • Organizer
      第9回日中強誘電体応用会議
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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