1. Effects of Gd doping on the sintering and microwave dielectric properties of BiNbO4 ceramics.
- Author
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Yue Pang, Chaowei Zhong, and Shuren Zhang
- Subjects
MICROWAVES ,DIELECTRICS ,CERAMICS ,MICROSTRUCTURE ,MATERIALS science ,COPPER ,X-ray diffraction - Abstract
Gd
3+ was chosen as a substitute for Bi3+ in BiNbO4 ceramics, and the substitution effects on the sintering performance and microwave dielectric properties were studied in this paper. The high temperature triclinic phase was observed only in the Bi0.98 Gd0.02 NbO4 ceramics when sintered at 920 °C. Both bulk densities and dielectric constant (εr ) increased with the sintering temperature, while decreased with the Gd content. The quality factor ( Q) exhibited a correlation to the Gd content and the microstructures of Bi1− x Gdx NbO4 ceramics. At the sintering temperature of 900 °C, Bi0.992 Gd0.008 NbO4 ceramics exhibited microwave dielectric properties of εr ∼ 43.87, Q × f ∼ 16,852 GHz (at 4.3 GHz), and its temperature coefficient of resonant frequency (τf ) was found to be near-to-zero. [ABSTRACT FROM AUTHOR]- Published
- 2007
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