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 journalArticle

8 Citations (Scopus)

Abstract

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
Volume21
Issue number1-4 SPEC. ISS.
DOIs
Publication statusPublished - Dec 2008
Externally publishedYes

Fingerprint

Barium titanate
Dielectric properties
barium
dielectric properties
Permittivity
Particle size
Oxalates
Barium
Crystallites
Powders
Pyrolysis
Impurities
Infrared radiation
Defects
permittivity
infrared reflection
oxalates
crystallites
thermal decomposition
tendencies

Keywords

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

ASJC Scopus subject areas

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

Cite this

Size dependence of THz region dielectric properties for barium titanate fine particles. / Wada, Satoshi; Yasuno, Hiroaki; Hoshina, Takuya; Kakemoto, Hirofumi; Kameshima, Yoshikazu; Tsurumi, Takaaki.

In: Journal of Electroceramics, Vol. 21, No. 1-4 SPEC. ISS., 12.2008, p. 198-201.

Research output: Contribution to journalArticle

Wada, Satoshi ; Yasuno, Hiroaki ; Hoshina, Takuya ; Kakemoto, Hirofumi ; Kameshima, Yoshikazu ; Tsurumi, Takaaki. / Size dependence of THz region dielectric properties for barium titanate fine particles. In: Journal of Electroceramics. 2008 ; Vol. 21, No. 1-4 SPEC. ISS. pp. 198-201.
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AU - Tsurumi, Takaaki

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