TY - JOUR
T1 - A novel low-loss microwave dielectric using (Ca0.8Sr0.2)TiO3-modified (Mg0.95Co0.05)2TiO4 ceramics
AU - Chen, Jhih Yong
AU - Huang, Cheng Liang
N1 - Funding Information:
This work was supported by the National Science Council of Taiwan under grant NSC 97-2262-E-006-013-MY3.
PY - 2010/4/30
Y1 - 2010/4/30
N2 - The microwave dielectric properties of conventional solid-state route prepared (1 - x)(Mg0.95Co0.05)2TiO4-x(Ca0.8Sr0.2)TiO3 ceramic system have been investigated. A two-phase system was confirmed by the X-ray diffraction patterns. (Mg0.95Co0.05)TiO3 was also detected as a second phase in the system. The microwave dielectric properties are strongly related to the density and the morphology of the specimens. The presence of the second phase, however, would cause no significant variation in the dielectric properties of the specimen because it possesses similar properties compared to that of the main phase (Mg0.95Co0.05)2TiO4. Specimen using 0.92(Mg0.95Co0.05)2TiO4-0.08(Ca0.8Sr0.2)TiO3 leads to a good combination of microwave dielectric properties with an εr of 19.22, a Q × f of 123,200 GHz (at 9.2 GHz) and a τf value of 2.8 ppm/°C. It is proposed as a candidate dielectric for applications in GPS patch antennas and 3G passive components.
AB - The microwave dielectric properties of conventional solid-state route prepared (1 - x)(Mg0.95Co0.05)2TiO4-x(Ca0.8Sr0.2)TiO3 ceramic system have been investigated. A two-phase system was confirmed by the X-ray diffraction patterns. (Mg0.95Co0.05)TiO3 was also detected as a second phase in the system. The microwave dielectric properties are strongly related to the density and the morphology of the specimens. The presence of the second phase, however, would cause no significant variation in the dielectric properties of the specimen because it possesses similar properties compared to that of the main phase (Mg0.95Co0.05)2TiO4. Specimen using 0.92(Mg0.95Co0.05)2TiO4-0.08(Ca0.8Sr0.2)TiO3 leads to a good combination of microwave dielectric properties with an εr of 19.22, a Q × f of 123,200 GHz (at 9.2 GHz) and a τf value of 2.8 ppm/°C. It is proposed as a candidate dielectric for applications in GPS patch antennas and 3G passive components.
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U2 - 10.1016/j.jallcom.2010.02.041
DO - 10.1016/j.jallcom.2010.02.041
M3 - Letter
AN - SCOPUS:77950865811
SN - 0925-8388
VL - 496
SP - L10-L13
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -