Synthesis and properties of Nd-substituted bismuth titanate polycrystalline thin films with polar-axis orientation

Masahiro Kurachi, Hirofumi Matsuda, Takashi Iijima, Hiroshi Uchida, Seiichiro Koda, Takayuki Watanabe, Hiroshi Funakubo

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

To gain a deep insight into the contribution of Nd-substitution, we have investigated structural phase transition behavior in Bi4-xNd xTi3O12 (BNT) powders derived from chemical solutions. Differential thermal analysis and thermo-gravimetry (DTA-TG) and X-ray diffraction (XRD) studies indicated that the para- and ferroelectric transition temperature (Curie temperature, Tc) continuously decreased with increasing x. The XRD studies also showed that continuous decrease in lattice anisotropy (a/b, orthorhombicity) with the increase of x. Considering the close relationship with Tc, a/b and spontaneous polarization Ps in displacive ferroelectrics, Nd-substitution may not enhance the intrinsic Ps in Bi4Ti3O12 (BIT). For direct evaluation of Ps upon Nd-substitution, synthesis route to polar-axis-orientated BNT films was investigated.

Original languageEnglish
Pages (from-to)53-56
Number of pages4
JournalKey Engineering Materials
Volume269
DOIs
Publication statusPublished - Jan 1 2004
Externally publishedYes
EventProceedings of the 23rd Electronics Division Meeting of the Ceramic Society of Japan - Kawasaki, Japan
Duration: Oct 23 2003Oct 24 2003

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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