Microwave dielectric properties and Far-infrared spectroscopic analysis of Ba5+nTinNb4O15+3n (0.3 < n < 1.2) ceramics

In Sun Cho, Jeong Ryeol Kim, Dong Wook Kim, Dong Wan Kim, Kug Sun Hong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Ba5+nTinNb4O15+3n ceramics (0.3 < n < 1.2) with a cation deficient hexagonal perovskite related structure were prepared by a conventional solid-state reaction method. The crystal structure and microstructure were investigated by X-ray powder diffraction (XRD) and field emission scanning electron microscope (FE-SEM), respectively. The microwave dielectric properties were measured using a network analyzer. The dielectric constant (εr) and the temperature coefficient of resonant frequency (τf) were increased and the quality factor (Q × f) was decreased with increasing in the n value. The effect of the crystal structure on the microwave dielectric properties was also investigated. The FT-IR reflection spectra were obtained and analyzed using a Kramers-Kronig relation.

Original languageEnglish
Pages (from-to)3081-3086
Number of pages6
JournalJournal of the European Ceramic Society
Volume27
Issue number8-9 SPEC. ISS.
DOIs
Publication statusPublished - 2007
Externally publishedYes

Keywords

  • Dielectric properties
  • Kramers-Kronig method
  • Niobates
  • Spectroscopy

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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