New dielectric material system of Nd(Mg1/2Ti1/2)O3–CaTiO3 at microwave frequency |
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Authors: | Cheng-Liang Huang Yuan-Bin Chen Shih-Hung Lin |
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Affiliation: | Department of Electrical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan |
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Abstract: | The microwave dielectric properties of (1 − x)CaTiO3–xNd(Mg1/2Ti1/2)O3 (0.1 x 1.0) ceramics prepared by the conventional solid state method have been investigated. The system forms a solid solution throughout the entire compositional range. The dielectric constant decreases from 152 to 27 as x varies from 0.1 to 1.0. In the (1 − x)CaTiO3–xNd(Mg1/2Ti1/2)O3 system, the microwave dielectric properties can be effectively controlled by varying the x value. At 1400 °C, 0.1CaTiO3–0.9Nd(Mg1/2Ti1/2)O3 has a dielectric constant (εr) of 42, a Q × f value of 35 000 GHz and a temperature coefficient of resonant frequency (τf) of −10 ppm/°C. As the content of Nd(Mg1/2Ti1/2)O3 increases, the highest Q × f value of 43 000 GHz for x = 0.9 is achieved at the sintering temperature 1500 °C. |
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Keywords: | Dielectric properties CaTiO3-Nd(Mg1/2Ti1/2)O3 Microwave dielectric properties |
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