Title :
Improved high-Q microwave dielectric resonator using B2O3 doped Nd(Co1/2Ti1/2)O3 ceramics
Author :
Tseng, Ching-Fang ; Huang, Cheng-Liang
Author_Institution :
Nat. Cheng Kung Univ., Tainan
Abstract :
The microwave dielectric properties and the microstructures of Nd(Co1/2Ti1/2)O3 ceramics prepared by conventional solid-state route have been studied. It is found that low-level doping of B2O3 (up to 0.75 wt%) can significantly improve the density and dielectric properties of Nd(Co1/2Ti1/2)O3 ceramics. At 1320degC/4 h, Nd(Co1/2Ti1/2)O3 ceramics with 0.75 wt% B2O3 addition possesses a dielectric constant (epsivr) of 27.2, a Qtimesf value of 153000 GHz (at 9 GHz) and a temperature coefficient of resonant frequency (tauf) of 0 ppm/degC. The B2O3-doped Nd(Co1/2Ti1/2)O3 ceramics can find applications in microwave devices requiring low sintering temperature.
Keywords :
dielectric resonators; microwave devices; B2O3; dielectric constant; frequency 153000 GHz; frequency 9 GHz; improved high-Q microwave dielectric resonator; low-level doping; microwave devices; resonant frequency; solid-state route; temperature coefficient; Ceramics; Dielectric constant; Dielectric materials; Dielectric measurements; Dielectric substrates; Microwave devices; Powders; Q factor; Resonant frequency; Temperature; Na(Co1/2Ti1/2)O3 ceramics; Qxf value; microwave dielectric properties; resonators; temperature coefficient of resonant frequency;
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429634
