Title :
Microwave dielectric properties of BaTi4O9 ceramics with addition of dopant(CoO, Y2O3)
Author :
Choi, Eui-Sun ; Lee, Moon-Kee ; Lee, Young-Hie ; Bae, Seon-Gi
Author_Institution :
Dept. of Electr. Mater. Eng., Kwangwoon Univ., Seoul, South Korea
Abstract :
The BaTi4O9 ceramics with addition of CoO, Y2O3 were prepared by conventional mixed oxide method. The structural properties were investigated with sintering temperature by XRD. Also the microwave dielectric properties of the BaTi4O9 ceramics were studied. According to the X-ray diffraction patterns of the BaTi4O9 ceramics with CoO and Y2O3, the structure of the ceramics was orthorhombic. The dielectric constant, quality factor and temperature coefficient of resonant frequency of the BaTi4O9+CoO(0.5wt%) ceramics sintered at 1350°C, were 40.8, 39,680 and 2.5 ppm/°C, respectively. The dielectric constant, quality factor and temperature coefficient of resonant frequency of the BaTi4O9+Y2O3(0.5wt%) ceramics sintered at 1400°C, were 41.3, 40,900 and 3.2 ppm/°C, respectively.
Keywords :
Q-factor; X-ray diffraction; barium compounds; ceramics; cobalt compounds; crystal structure; dielectric materials; microwave materials; particle size; permittivity; sintering; yttrium compounds; 1350 degC; 1400 degC; BaTi4O9 ceramics; BaTi4O9:CoO,Y2O3; XRD; conventional mixed oxide method; dielectric constant; dopant(CoO, Y2O3); microwave dielectric properties; orthorhombic structure; quality factor; resonant frequency; sintering; structural properties; temperature coefficient; Biological materials; Ceramics; Dielectric constant; Dielectric materials; Dielectric measurements; Powders; Q factor; Resonant frequency; Temperature; X-ray scattering;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on
Print_ISBN :
0-7803-7725-7
DOI :
10.1109/ICPADM.2003.1218532
