Abstract
The effect of CaO–B2O3–ZnO (CBZ) glass on the microstructures and microwave dielectric properties of Ba2Ti9O20 ceramics was investigated. With the addition of CBZ glass, the densification temperature of Ba2Ti9O20 can be effectively reduced from 1400 to 880–920 °C. It is found that the addition of CBZ glass (20–30 wt %) can significantly improve the density and dielectric properties of Ba2Ti9O20 ceramics. The dielectric properties of Ba2Ti9O20 ceramics were strongly dependent upon the amount of CBZ glass addition. A dielectric constant (εr) of 27.0, a quality factor (Q ×f) value of 13,400 GHz, and a temperature coefficient of resonant frequency (τf) of 17.8 ppm/°C were obtained for 20 wt % CBZ glass-doped Ba2Ti9O20 ceramics sintered at 920 °C for 2 h.
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