Dielectric Properties of Ceramics in Ba (Co1/3 Nb2/3)O3–Ba(Zn1/3Nb2/3)O3 Solid Solution |
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Authors: | Kazuaki Endo Kenji Fujimoto Kyohei Murakawa |
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Affiliation: | Fuji Electrochemical Company, Ltd., Kosai-shi. Shizuoka-ken 431–04, Japan |
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Abstract: | The dielectric properties of the Ba (Co1/3 Nb2/3)O3–Ba(Zn1/3Nb2/3)O3 system were determined. Ba (Co1/3 Nb2/3)O3–Ba(Zn1/3Nb2/3)O3 has a complex perovskite structure, a high dielectric constant, a low dielectric loss, and a low temperature coefficient of the resonant frequency. A solid-solution ceramic with 0.7Ba (Co1/3 Nb2/3)O3·0.3 Ba(Zn1/3Nb2/3)O3 has a dielectric constant of K=33.5, Q=11000 at 6.5 GHz, and a temperature coefficient of the resonant frequency of τf=0 ppm/°C. The temperature coefficient of resonant frequency can be varied by changing the composition. The Q values of the ceramics can be increased by annealing in a nitrogen atmosphere. These ceramics can be used for resonant elements and stabilized oscillators. |
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