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.
|Number of pages||5|
|Journal||Journal of the European Ceramic Society|
|Publication status||Published - 2006 Apr 11|
- Dielectric properties
- X-ray method
ASJC Scopus subject areas
- Ceramics and Composites