High yield preparation of (100)<i>_c</i>-oriented (K,Na)NbO₃ thick films by hydrothermal method using amorphous niobium source

• ITO Yoshiharu

  Department of Materials Science and Engineering, Tokyo Institute of Technology

• TATEYAMA Akinori

  Department of Materials Science and Engineering, Tokyo Institute of Technology

• NAKAMURA Yoshiko

  Department of Materials Science and Engineering, Tokyo Institute of Technology

• SHIMIZU Takao

  Department of Materials Science and Engineering, Tokyo Institute of Technology

• KUROSAWA Minoru

  Department of Electrical and Electronic Engineering, Tokyo Institute of Technology

• UCHIDA Hiroshi

  Department of Materials and Life Sciences, Sophia University

• SHIRAISHI Takahisa

  Institute for Materials Research, Tohoku University, Building 2, 6th Floor

• KIGUCHI Takanori

  Institute for Materials Research, Tohoku University, Building 2, 6th Floor

• KONNO Toyohiko J.

  Institute for Materials Research, Tohoku University, Building 2, 6th Floor

• ISHIKAWA Mutsuo

  Department of Clinical Engineering, Toin University of Yokohama

• KUMADA Nobuhiro

  Center for Crystal Science and Technology, Department of Science for Advanced Materials, Yamanashi University

• FUNAKUBO Hiroshi

  Department of Materials Science and Engineering, Tokyo Institute of Technology

Abstract

(K,Na)NbO₃ thick films were prepared at 240 °C on (100)_cSrRuO₃//(100)SrTiO₃ substrates by hydrothermal method. Film thickness increased using an amorphous niobium source instead of conventionally used crystalline one and have the maximum thickness at 0.5 mmol of input mass of niobium source within the range of 0.02–7.5 mmol in case of the 20 h deposition. The yield of (K,Na)NbO₃ films from 0.5 mmol amorphous niobium source becomes 20 times higher than that from conventionally used a 2 mmol crystalline niobium source. In addition, crystal structure, surface morphology, dielectric constant, and ferroelectric and piezoelectric properties of these films were almost independent of the kinds of niobium sources and their input mass within the limitation of the present results.

Journal

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 128 (8), 512-517, 2020-08-01

  The Ceramic Society of Japan

Keywords

• Hydrothermal synthesis
• Lead-free (K,Na)NbO₃ films
• High yield
• Ferroelectric and piezoelectric properties

Details

• CRID: 1390003825203594752
• NII Article ID: 130007883924
• DOI: 10.2109/jcersj2.20023
• ISSN: 13486535
• ISSN: 18820743
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/128/8/128_20023/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed