Microwave Dielectrics in the (La1/2Na1/2)TiO3–Ca(Fe1/2Nb1/2)O3 System |
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Authors: | Hyun-Jai Kim Sergey Kucheiko Seok-Jin Yoon Hyung-Jin Jung |
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Affiliation: | Division of Ceramics, Korea Institute of Science and Technology, Seoul 130–650, Korea |
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Abstract: | Dielectric properties of the system (1 ? x)(La1/2Na1/2)TiO3– x Ca(Fe1/2Nb1/2)O3, where 0.4 # x # 0.6, have been investigated at microwave frequencies. The temperature coefficient of resonant frequency (τf), nearly 0 ppm/°C, was realized at x = 0.58. These ceramics had perovskite structure and showed relatively low dielectric losses. A new dielectric material applicable to microwave devices having Q · f of 12000–14000 GHz and a dielectric constant (εr) of 59–60 has been obtained at 1300–1350°C for 5–15 h sintering. |
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