TY - JOUR
T1 - Microwave dielectric properties of (Mg0.95Co0.05)TiO3-(Na0.5Nd0.5)TiO3 ceramic system
AU - Huang, Cheng Liang
AU - Chen, Jhih Yong
AU - Wang, Yen Hsing
N1 - Funding Information:
This work was supported by the National Science Council of Taiwan under grant NSC 96-2221-E-006-117.
PY - 2009/6/10
Y1 - 2009/6/10
N2 - The microwave dielectric properties and the microstructures of the (1 - x)(Mg0.95Co0.05)TiO3-x(Na0.5Nd0.5)TiO3 (0.1 ≤ x ≤ 0.18) ceramic system have been investigated. The two phase system was confirmed by XRD and EDX analysis throughout the entire experimental range. In this system, the microwave dielectric properties can be effectively controlled by varying the x value. The dielectric constant ranged from 18.3 to 25.4 as the x varies from 0.1 to 0.18. With the increase of sintering temperature, the Q × f increased to a maximum and decreased thereafter. A maximum Q × f ∼ 112,000 GHz (where f = 8.6 GHz, is the resonant frequency) was achieved for samples with x = 0.1. For practical applications, a new microwave dielectric material, 0.84(Mg0.95Co0.05)TiO3-0.16(Na0.5Nd0.5)TiO3, is suggested and possesses a good combination of dielectric properties: εr ∼ 24.39, Q × f ∼ 70,000 GHz, τf ∼ 1.6 ppm/°C. It is proposed as a suitable candidate dielectric for GPS patch antennas and passive components in wireless communication system.
AB - The microwave dielectric properties and the microstructures of the (1 - x)(Mg0.95Co0.05)TiO3-x(Na0.5Nd0.5)TiO3 (0.1 ≤ x ≤ 0.18) ceramic system have been investigated. The two phase system was confirmed by XRD and EDX analysis throughout the entire experimental range. In this system, the microwave dielectric properties can be effectively controlled by varying the x value. The dielectric constant ranged from 18.3 to 25.4 as the x varies from 0.1 to 0.18. With the increase of sintering temperature, the Q × f increased to a maximum and decreased thereafter. A maximum Q × f ∼ 112,000 GHz (where f = 8.6 GHz, is the resonant frequency) was achieved for samples with x = 0.1. For practical applications, a new microwave dielectric material, 0.84(Mg0.95Co0.05)TiO3-0.16(Na0.5Nd0.5)TiO3, is suggested and possesses a good combination of dielectric properties: εr ∼ 24.39, Q × f ∼ 70,000 GHz, τf ∼ 1.6 ppm/°C. It is proposed as a suitable candidate dielectric for GPS patch antennas and passive components in wireless communication system.
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U2 - 10.1016/j.jallcom.2008.12.042
DO - 10.1016/j.jallcom.2008.12.042
M3 - Article
AN - SCOPUS:67349093094
SN - 0925-8388
VL - 478
SP - 842
EP - 846
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -