Size dependence of THz region dielectric properties for barium titanate fine particles

Satoshi Wada, Hiroaki Yasuno, Takuya Hoshina, Hirofumi Kakemoto, Yoshikazu Kameshima, Takaaki Tsurumi

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Barium titanate (BaTiO3) crystallites with various particle sizes from 22 to 500 nm were prepared by the two-step thermal decomposition method of barium titanyl oxalate. Various characterizations revealed that these particles were impurity-free, defect-free, dense BaTiO3 particles. The powder dielectric measurement clarified that the dielectric constant of BaTiO3 particles with a size of around 58 nm exhibited a maximum of over 15,000. To explain this size dependence, the THz region dielectric properties of BaTiO3 fine particles, especially Slater mode frequency, were measured using the far infrared (FIR) reflection method. As the result, the lowest Slater mode frequency was obtained at 58 nm. This tendency was completely consistent with particle size dependence of the dielectric constant.

Original languageEnglish
Pages (from-to)198-201
Number of pages4
JournalJournal of Electroceramics
Issue number1-4 SPEC. ISS.
Publication statusPublished - Dec 2008
Externally publishedYes


  • Barium titanate
  • Fine particle
  • Infrared reflection
  • THz region dielectric property

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry


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