A large piezoelectric voltage coefficient in aluminate-sodalite-type improper ferroelectric oxides

Hiroki Taniguchi, Taiga Hattori, Toshihiro Isobe, Akitoshi Nakano, Ichiro Terasaki, Manabu Hagiwara

Research output: Contribution to journalArticlepeer-review

Abstract

The dielectric and piezoelectric properties of aluminate-sodalite-type oxides, (Ca1-xSrx)8[AlO2]12{MoO4}2 ((CS)AM-x), have been investigated in the present study. The variation of dielectric anomalies clarifies the phase diagram of (CS)AM-x over a composition range of x = 0.00-0.20 to suggest that a unique phase boundary like the morphotropic phase boundary (MPB) exists between x = 0.05 and 0.10. The piezoelectric voltage coefficient g33 at room temperature has been found to culminate around the phase boundary with the value being greater than that for the conventional lead-free perovskite-type ferroelectric oxides. The present result sheds light on the development of eco-friendly piezoelectric-active materials with excellent functionalities.

Original languageEnglish
Pages (from-to)15649-15653
Number of pages5
JournalJournal of Materials Chemistry C
Volume9
Issue number43
DOIs
Publication statusPublished - 2021 Nov 21

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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