Low-temperature sintering and microwave dielectric properties of Ba5Nb4O15 with ZnB2 O4 glass

Jeong Ryeol Kim, Dong Wan Kim, Hyun Suk Jung, Kug Sun Hong

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34 Citations (Scopus)

Abstract

The Influence of ZnB2O4 glass addition on the sintering temperature and microwave dielectric properties of Ba5Nb4O15 has been investigated using dilatometry, X-ray diffraction, scanning electron microscopy and network analyzer. It was found that a small amount of glass addition to Ba5Nb4O15 lowered the sintering temperature from 1400 to 900 °C. The reduced sintering temperature was attributed to the formation of ZnB2O4 liquid phase and B2O3-rich liquid phases such as Ba3B2O6. The Ba5 Nb4O15 ceramics with ZnB2O4 glass, sintered at a low temperature, exhibited good microwave dielectric characteristics, i.e., a quality factor (Q × f) = 12,100 GHz, a relative dielectric constant (εr) = 40, a temperature coefficient of resonant frequency (τf) = 48 ppm/°C. The dielectric properties were discussed in terms of the densification of specimens and the influence of glassy phases such as Ba3B2O6 and ZnB2O4.

Original languageEnglish
Pages (from-to)2105-2109
Number of pages5
JournalJournal of the European Ceramic Society
Volume26
Issue number10-11
DOIs
Publication statusPublished - 2006
Externally publishedYes

Keywords

  • BaNbO
  • Dielectric properties
  • Glass
  • Sintering
  • X-ray method

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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