Microwave dielectric properties of Bi2O3-doped Ca[(Li1/3Nb2/3)1-xTix] O3-δ ceramics

Jong Yoon Ha, Ji Won Choi, Seok Jin Yoon, Doo Jin Choi, Ki Hyun Yoon, Hyun Jai Kim

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32 Citations (Scopus)

Abstract

The effect of the additive on the densification, low temperature sintering, and microwave dielectric properties of the Ca[(Li1/3Nb2/3)1-x Tix]O3-δ(CLNT) was investigated. Bi2O3 addition improved the densification and reduced the sintering temperature from 1150 to 900 °C of CLNT microwave dielectric ceramics. As the Bi2O3 content increased, the dielectric constant (εr) and bulk density increased. The quality factor (Q·f0), however, was decreased slightly. The temperature coefficient of resonant frequency (τf) shifted to a positive value with increasing Bi2O3 content. The dielectric properties (εr, Q·f0, τf) of Ca[(Li1/3Nb2/3)0.95Ti0.05] O3-δ and Ca[(Li1/3 Nb2/3)0.8 Ti0.2]O3-δ with 5 wt.% Bi2O3 sintered at 900 °C for 3 were 20, 6500 GHz, -4 ppm/°C, and 35, 11,000 GHz, 13 ppm/°, respectively. The relationship between the microstructure and dielectric properties was studied by X-ray diffraction (XRD), and SEM.

Original languageEnglish
Pages (from-to)2413-2416
Number of pages4
JournalJournal of the European Ceramic Society
Volume23
Issue number14
DOIs
Publication statusPublished - 2003 Jan 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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