Microwave dielectric properties and applications of Ba(Zn1/3Nb2/3)O-3-Ca(Zn1/3Nb2/3)O-3 composite ceramics by one-step synthesis method

作者：Wang Xu^*; Li Yuanxun; Li Jie; Yu Guoliang; Zuo Lin; Zhang Huaiwu

来源：Journal of Materials Science: Materials in Electronics , 2014, 25(11): 4720-4724.

DOI：10.1007/s10854-014-2222-6

(1 - x) Ca(Zn1/3Nb2/3) O-3 - xBa(Zn1/3Nb2/3)O-3 (short for CZN/BZN, x = 0-1.0) ceramics were prepared and investigated through the "one-step synthesis method" method. The structure of the system was analyzed using X-ray diffraction. The microstructure of the sintered pellet was analyzed using scanning electron microscopy. Dielectric constant (epsilon(r)), temperature coefficient of resonant frequency (tau(f)) and the unloaded quality factor (Q x f) were measured in the microwave frequency region. Two dielectric properties were firstly in the rising tendency and then decreasing with the increased x. On the other hand, a good combination of microwave dielectric properties (epsilon(r) = 24, Q x f = 23,510 GHz tau(f) = -9 ppm/degrees C) were obtained at x = 0.1. The compositions have excellent microwave dielectric properties and hence are suitable for ceramic capacitors or dielectric resonators applications.

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