Microwave dielectric properties of low-fired Ba5Nb4O15

Dong Wan Kim, Jeong Ryeol Kim, Sung Hun Yoon, Kug Sun Hong, Chang Kyung Kim

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The effect of B2O3 on the sintering temperature and microwave dielectric properties of Ba5Nb4O15 has been investigated using X-ray powder diffraction, scanning electron microscopy, and a network analyzer. Interactions between Ba5Nb4O15 and B2O3 led to formation of second phases, BaNb2O6 and BaB2O4. The addition of B2O3 to Ba5Nb4O15 resulted in lowering the sintering temperature from 1400° to 925°C. Low-fired Ba5Nb4O15 could be interpreted by measuring changes in the quality factor (Q × f), the relative dielectric constant (εr), and the temperature coefficient of resonant frequency (τf) as a function of B2O3 additions. More importantly, the formation of BaNb2O6 provided temperature compensation. The microwave dielectric properties of low-fired Ba5Nb4O15 had good dielectric properties: Q × f = 18700 GHz, εr = 39, and τf = 0 ppm/°C.

Original languageEnglish
Pages (from-to)2759-2762
Number of pages4
JournalJournal of the American Ceramic Society
Volume85
Issue number11
DOIs
Publication statusPublished - 2002 Nov

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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