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High-performance Pb-free piezoelectrics for substitution of PZT

Research Project

Project/Area Number 20H02471
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26040:Structural materials and functional materials-related
Research InstitutionNational Institute for Materials Science

Principal Investigator

Ren Xiaobing  国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, 上席研究員 (50292529)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Keywords圧電材料 / 強誘電材料 / 相転移 / 非鉛圧電材料 / 強誘電体 / 強誘電相転移 / PZT代替
Outline of Research at the Start

兆円規模の市場を有する圧電材料は現在危機的状況にある。「圧電の王様」とも呼ばれる優れた圧電特性を有するPZT材料は半世紀以上に亘って圧電市場を支えてきたが、有害な鉛を含有するため環境規制の対象になっている。しかし、圧電特性と安定性においてPZTを代替できる高性能非鉛圧電材料はまだ現れていない。本研究では、申請者らが発見した圧電特性を大きく増幅する「三重点MPB機構」及び特性の安定性を向上するdiffuse ferro-ferro相転移機構を非鉛圧電材料系に応用し、圧電特性と安定性の両方ともPZT材料に匹敵する非鉛圧電材料を創出し、PZTの代替を目指すことを目的とする。

Outline of Final Research Achievements

1. We proposed a tri-critical MPB theory. which enables a inclined MPB to have large piezoelectricity. As the result, it becomes a guideline to desige high-performance Pb-free piezoelectric materials, which usually possess inclined MPB. 2. We succeeded in stabilizing piezoelectric properties of Pb-fee materials by using long-time aging to stabilize their domain structure. 3.By modifying a tri-critical ferroelectric material into a tri-relaxor state through defect doping, we achieved simultaneously large electrostrain and small hysteresis, which was not possible before. 4. We developed new Pb-free piezoelectrics which has piezoelectric properties comparable with those of PZT (soft-PZT-like Pb-free material has a d33 about 600pC/N, and hard-PZT-like materials have d33=250‐300pC/N, Qm=500~800), These materials are to be patented.

Academic Significance and Societal Importance of the Research Achievements

半世紀以上に亘って巨大な圧電産業を支えてきた圧電材料の「優等生」であるPZTは有毒な鉛を含有するため、世界規模の環境規制で使用禁止される予定である。それによって、これまでPZTに依存してきた巨大な圧電産業は大きな危機に直面しており、PZTの圧電特性及び特性の安定性に匹敵する高性能の非鉛圧電材料の開発は喫緊の課題となった。
本研究では、申請者がこれまでの重要な成果を踏まえ、非鉛圧電材料開発に関する原理的な難問を解決し、圧電特性と安定性の両方がPZTに匹敵する非鉛圧電材料の創出に前進し、PZTを代替できる材料を提供した。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (13 results)

All 2023 2022 2021 Other

All Int'l Joint Research (5 results) Journal Article (8 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 8 results)

  • [Int'l Joint Research] Xi'an Jiaotong University(中国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Xi'an Jiaotong University(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] The University of New South Wales(オーストラリア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of California, Irvine/Ohio State University(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Xi'an Jiaotong University(中国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Toughening Ceramics down to Cryogenic Temperatures by Reentrant Strain-Glass Transition2023

    • Author(s)
      Fang Minxia、Ji Yuanchao、Ni Yan、Wang Wenjia、Zhang Hengmin、Wang Xifei、Xiao Andong、Ma Tianyu、Yang Sen、Ren Xiaobing
    • Journal Title

      Physical Review Letters

      Volume: 130 Issue: 11 Pages: 116102-116102

    • DOI

      10.1103/physrevlett.130.116102

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Stabilized piezoelectricity upon ferro-ferro phase transition achieved by aging induced domain memory effect in acceptor doped lead-free ceramics2022

    • Author(s)
      Yin Mengye、Fang Minxia、Ji Yuanchao、Wang Dong、Ren Xiaobing
    • Journal Title

      Scripta Materialia

      Volume: 219 Pages: 114872-114872

    • DOI

      10.1016/j.scriptamat.2022.114872

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Microscopic origin of the enhanced piezoelectric thermal stability in acceptor doped lead-free Ba(Ti0.8Zr0.2)O3-50(Ba0.7Ca0.3)TiO3 ceramic2022

    • Author(s)
      Yin Mengye、Fang Minxia、Zhang Lixue、Zhou Chao、Xiao Andong、Ji Yuanchao、Ma Tianyu、Ren Xiaobing
    • Journal Title

      Ceramics International

      Volume: 48 Issue: 4 Pages: 5274-5279

    • DOI

      10.1016/j.ceramint.2021.11.069

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Role of point defects in the formation of relaxor ferroelectrics2022

    • Author(s)
      Hong Zhengkai、Ke Xiaoqin、Wang Dong、Yang Sen、Ren Xiaobing、Wang Yunzhi
    • Journal Title

      Acta Materialia

      Volume: 225 Pages: 117558-117558

    • DOI

      10.1016/j.actamat.2021.117558

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Large electrostrain with nearly-vanished hysteresis in eco-friendly perovskites by building coexistent glasses near quadruple point2021

    • Author(s)
      He Liqiang、Wang Dong、Xu Mingjie、Zhang Le、Ye Fan、Wu Ming、Zhang Lixue、Wang Danyang、Pan Xiaoqing、Ren Xiaobing
    • Journal Title

      Nano Energy

      Volume: 90 Pages: 106519-106519

    • DOI

      10.1016/j.nanoen.2021.106519

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Excellent thermal-cycling stability caused by aging in Fe-doped (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 lead-free piezoceramic2021

    • Author(s)
      Hao Yanshuang、He Liqiang、Ren Shuai、Ji Yuanchao、Ren Xiaobing
    • Journal Title

      Scripta Materialia

      Volume: 202 Pages: 113990-113990

    • DOI

      10.1016/j.scriptamat.2021.113990

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Existence of a quadruple point in a binary ferroelectric phase diagram2021

    • Author(s)
      Ke Xiaoqin、Yang Sen、Wang Yu、Wang Dong、Zhao Luo、Gao Jinghui、Wang Yunzhi、Ren Xiaobing
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 8 Pages: 085132-085132

    • DOI

      10.1103/physrevb.103.085132

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Designed morphotropic relaxor boundary ceramic exhibiting large electrostrain and negligible hysteresis2021

    • Author(s)
      Yang Yang、Liu Chang、Ji Yuanchao、He Liqiang、Ren Xiaobing
    • Journal Title

      Acta Materialia

      Volume: 208 Pages: 116720-116720

    • DOI

      10.1016/j.actamat.2021.116720

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research

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Published: 2020-04-28   Modified: 2024-01-30  

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