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以分析纯的ZnO、ZrO_2、CuO及Nb_2O_5为原料,采用传统固相法制备了Zn_(1–x_Cu_xZrNb_2O_8(ZCZN,x=0.00–0.05)微波介质陶瓷,研究了不同CuO添加量对ZCZN陶瓷的烧结性能、显微结构、相组成以及微波介电性能的影响,利用X射线衍射仪、扫描电子显微镜和网络分析仪等对其微观结构、形貌以及微波介电性能进行表征。结果表明:CuO的添加能有效降低ZnZrNb_2O_8陶瓷的烧结温度,提高其品质因数和介电常数。当x=0.03时,陶瓷可在1 200℃烧结并获得最佳微波介电性能:介电常数ε_r=30.1,品质因数Q×f=53 037 GHz,频率温度系数τ_f=–57.21×10~(–6)/℃。
A series of microwave dielectric ceramics with Zn_ (1-x_Cu_xZrNb_2O_8) (ZCZN, x = 0.00-0.05) were prepared by the conventional solid-state method using the pure ZnO, ZrO_2, CuO and Nb_2O_5 as raw materials. The effects of different amounts of CuO on the sintering of ZCZN ceramics Performance, microstructure, phase composition and microwave dielectric properties were investigated by X-ray diffraction, scanning electron microscopy and network analyzer.The results show that the CuO The sintering temperature of ZnZrNb_2O_8 ceramics can be effectively reduced and its quality factor and dielectric constant can be increased.When x = 0.03, the ceramics can be sintered at 1200 ℃ and the best microwave dielectric properties are obtained: dielectric constant ε_r = 30.1, quality factor Q × f = 53 037 GHz, frequency temperature coefficient τ_f = -57.21 × 10 -6 / ℃.