Title :
Microwave dielectric properties of Ba(Mg,Ta)O3-Ba(Co,Nb)O3 ceramics
Author :
Lee, M.K. ; Chung, J.H. ; Ryu, K.W. ; Lee, Y.H.
Author_Institution :
Kwangwoon Univ., Seoul, South Korea
Abstract :
Ba(Mg,Ta)O3-Ba(Co,Nb)O3 ceramics were prepared by the conventional mixed oxide method. The ceramics were sintered at the temperature of 1500~1575°C for 5 hours in air. Ba(Mg,Ta)O3-Ba(Co,Nb)O3 ceramics have a structure of complex perovskite type, and have peaks of (101), (102), (201), (202) and (212). In the case of the 0.7Ba(Mg,Ta)O3-0.3Ba(Co,Nb)O 3 specimens sintered at 1550°C for 5 hours, dielectric constant, duality factor and temperature coefficient of resonant frequency (TCRF, τf) were a good value of 27, 15, 712 at 11 GHz and -1.3 PPM/°C from 25°C to 60°C, respectively
Keywords :
barium compounds; ceramics; crystal structure; dielectric losses; permittivity; sintering; 1500 to 1575 degC; 25 to 60 degC; BaMgO3TaO3-BaCoO3NbO3; ceramics; complex perovskite structure; dielectric constant; duality factor; microwave dielectric properties; mixed oxide synthesis; sintering; temperature coefficient of resonant frequency; Ceramics; Dielectric constant; Grain size; Microstructure; Powders; Q factor; Resonance; Scanning electron microscopy; Temperature; X-ray scattering;
Conference_Titel :
Electrical Insulating Materials, 1998. Proceedings of 1998 International Symposium on
Conference_Location :
Toyohashi
Print_ISBN :
4-88686-050-8
DOI :
10.1109/ISEIM.1998.741705
