High yield preparation of (100)c-oriented (K,Na)NbO3 thick films by hydrothermal method using amorphous niobium source

Yoshiharu Ito, Akinori Tateyama, Yoshiko Nakamura, Takao Shimizu, Minoru Kurosawa, Hiroshi Uchida, Takahisa Shiraishi, Takanori Kiguchi, Toyohiko J. Konno, Mutsuo Ishikawa, Nobuhiro Kumada, Hiroshi Funakubo

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


(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 0.027.5 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.

Original languageEnglish
Pages (from-to)512-517
Number of pages6
JournalJournal of the Ceramic Society of Japan
Issue number8
Publication statusPublished - 2020 Aug 1


  • Ferroelectric and piezoelectric properties
  • High yield
  • Hydrothermal synthesis
  • Lead-free (k
  • Na)nbo3 films

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


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