【摘要】 采用传统固相反应法制备（1-x）（0.7ZnNb₂O₆-0.3Zn₃Nb₂O₈）-xZnAl₂O₄（摩尔分数x=0～10%,ZZZ）微波介质陶瓷,研究了其物相组成、晶体结构及微波介电性能。结果表明,ZZZ材料能在1 150℃烧结成瓷,形成了ZnNb₂O₆、Zn₃Nb₂O₈和ZnAl₂O₄共存的复相结构,无其他新相生成。在微波频率下,ZZZ陶瓷的介电常数为21～24,品质因数与频率之积（Q×f）为30 000～85 000 GHz。随ZnAl₂O₄含量的增加,ZZZ陶瓷的微波介电常数、Q×f值及谐振频率温度系数均减小,温度稳定性提高。更多还原

【Abstract】 The（1-x）（0.7 ZnNb₂O₆-0.3 Zn₃Nb₂O₈）-xZnAl₂O₄（x=0～10%, ZZZ） microwave dielectric ceramics were prepared by the conventional solid-state reaction process. The phase composition, microstructure and microwave dielectric properties of the ZZZ ceramics were investigated. The results show that the ZZZ ceramics can be sintered into porcelain at 1 150 ℃, forming a multiphase structure in which ZnNb₂O₆, Zn₃Nb₂O₈ and ZnAl₂O₄ coexist without appearance of new phases. At microwave frequency, the dielectric constant of ZZZ ceramics is 21 to 24, and the product of quality factor and frequency（Q×f） is 30 000 GHz to 85 000 GHz. With the increase of ZnAl₂O₄ content, the microwave dielectric constant, Q×f value, and temperature coefficient of resonance frequency of ZZZ ceramics decrease, and the temperature stability improves.更多还原