Deposition of orientation-controlled thick (K,Na)NbO3 films on metal substrates by repeated hydrothermal deposition technique

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

(K,Na)NbO3 thick films were grown at 240°C on Ni-based metal substrates by repeated hydrothermal method. The metal substrates were covered with two types of buffer layers; SrRuO3/LaNiO3 and SrRuO3. Film thickness monotonically increased with increasing number of deposition cycles. The 27 ¯m-thick film was obtained on the metal substrate with SrRuO3/LaNiO3 by four cycles. The obtained films tended to show {100}c orientation and their degree of orientation increased with increasing number of deposition cycles. Films deposited on SrRuO3/LaNiO3-covered metal substrates showed more highly {100}c orientation compared with those on SrRuO3-covered metal substrates. Remnant polarization and coercive field measured at 5 kHz were 12 ¯C/cm2 and 70 kV/cm, while their effective values of piezoelectric coefficient (d33) was 3540 pm/V for both films. These properties remained unchanged irrespective of a number of deposition cycles despite the orientation change of films. These results show that repeated hydrothermal deposition technique is one of the effective ways to prepare thick (K,Na)NbO3 films on metal substrates.

Original languageEnglish
Pages (from-to)478-484
Number of pages7
JournalJournal of the Ceramic Society of Japan
Volume127
Issue number7
DOIs
Publication statusPublished - 2019

Keywords

  • Ferroelectric
  • Hydrothermal synthesize
  • Lead-free (K,Na)NbO film
  • Metal substrate
  • Orientation control
  • Piezoelectric properties

ASJC Scopus subject areas

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

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