Ferroelectric mesocrystals of bismuth sodium titanate: Formation mechanism, nanostructure, and application to piezoelectric materials

Dengwei Hu, Xingang Kong, Kotaro Mori, Yasuhiro Tanaka, Kazunari Shinagawa, Qi Feng

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Ferroelectric mesocrystals of Bi0.5Na0.5TiO 3 (BNT) with [100]-crystal-axis orientation were successfully prepared using a topotactic structural transformation process from a layered titanate H1.07Ti1.73O4·nH2O (HTO). The formation reactions of BNT mesocrystals in HTO-Bi2O 3-Na2CO3 and HTO-TiO2-Bi 2O3-Na2CO3 reaction systems and their nanostructures were studied by XRD, FE-SEM, TEM, SAED, and EDS, and the reaction mechanisms were given. The BNT mesocrystals are formed by a topotactic structural transformation mechanism in the HTO-Bi2O 3-Na2CO3 reaction system and by a combination mechanism of the topotactic structural transformation and epitaxial crystal growth in the HTO-TiO2-Bi2O3-Na 2CO3 reaction system, respectively. The BNT mesocrystals prepared by these methods are constructed from [100]-oriented BNT nanocrystals. Furthermore, these reaction systems were successfully applied to the fabrication of [100]-oriented BNT ferroelectric ceramic materials. A BNT ceramic material with a high degree of orientation, high relative density, and small grain size was achieved.

Original languageEnglish
Pages (from-to)10542-10551
Number of pages10
JournalInorganic chemistry
Volume52
Issue number18
DOIs
Publication statusPublished - Sep 16 2013
Externally publishedYes

Fingerprint

Bismuth
Piezoelectric materials
bismuth
Ferroelectric materials
Nanostructures
sodium
Ceramic materials
Crystallization
Epitaxial growth
Crystal orientation
Nanocrystals
Energy dispersive spectroscopy
Transmission electron microscopy
Fabrication
Crystals
Scanning electron microscopy
ceramics
sodium titanate
crystal growth
nanocrystals

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Ferroelectric mesocrystals of bismuth sodium titanate : Formation mechanism, nanostructure, and application to piezoelectric materials. / Hu, Dengwei; Kong, Xingang; Mori, Kotaro; Tanaka, Yasuhiro; Shinagawa, Kazunari; Feng, Qi.

In: Inorganic chemistry, Vol. 52, No. 18, 16.09.2013, p. 10542-10551.

Research output: Contribution to journalArticle

Hu, Dengwei ; Kong, Xingang ; Mori, Kotaro ; Tanaka, Yasuhiro ; Shinagawa, Kazunari ; Feng, Qi. / Ferroelectric mesocrystals of bismuth sodium titanate : Formation mechanism, nanostructure, and application to piezoelectric materials. In: Inorganic chemistry. 2013 ; Vol. 52, No. 18. pp. 10542-10551.
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