Analysis of Composite Structures on Barium Titanate Fine Particles using Synchrotron Radiation

Takuya Hoshina, Hirofumi Kakemoto, Takaaki Tsurumi, Satoshi Wada, Masatomo Yashima, Kenichi Kato, Masaki Takata

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The crystal structures of barium titanate (BaTiO3) fine particles with a size around 140 nm were investigated using a synchrotron radiation X-ray diffraction method. The observed diffraction pattern was analyzed by Rietveld method assuming several models. As a result, it is found that the BaTiO3 fine particles have composite structures include (a) a tetragonal region with a constant c/a ratio, (b) a tetragonal region with gradient c/a ratios and (c) a cubic region. In order to estimate these structures, the partial profile relaxation technique was applied in the Rietveld refinement. It is considered that the composite structure is important for the size effect on BaTiO3 fine particles.

Original languageEnglish
Pages (from-to)239-242
Number of pages4
JournalKey Engineering Materials
Volume301
DOIs
Publication statusPublished - 2006 Jan 1

Keywords

  • Barium Titanate
  • Nanoparticle
  • Partial Profile Relaxation Technique
  • Rietveld method
  • Size Effect
  • Surface relaxation model
  • Synchrotron Radiation XRD

ASJC Scopus subject areas

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

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