Abstract A series of new microwave dielectric ceramics Ln2Zr3(MoO4)9 (Ln˭Sm (SZM), Nd (NZM)) was successfully fabricated by a standard solid-state reaction method. The X-ray diffraction and Rietveld refinement results demonstrate that pure-phase SZM and NZM ceramics belong to the hexagonal system with a space group R 3 ¯ c. Scanning electron microscopy results reveal dense and homogeneous microstructures of these two ceramics as sintered at their respective optimum sintering temperature. Furthermore, the SZM and NZM ceramics sintered at 875 °C for 4 h and 850 °C for 4 h possess excellent microwave dielectric properties of dielectric permittivity er ~ 11.0, quality factor Qxf ~ 74,012 GHz (10.6 GHz), and temperature coefficient of resonance frequency τf ~ − 45.3 ppm/°C, and er ~ 10.8, Qxf ~ 58,942 GHz (10.5 GHz), and τf ~ − 40.9 ppm/°C, respectively. These experimental results show great potentials for applications of low temperature co-fired ceramic technology.

中文翻译：

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低温烧制 Ln 2 Zr 3 (MoO 4 ) 9 (Ln=Sm, Nd) 微波介电陶瓷

摘要 采用标准固相反应法成功制备了一系列新型微波介电陶瓷Ln2Zr3(MoO4)9 (Ln˭Sm (SZM), Nd (NZM))。X射线衍射和Rietveld精修结果表明纯相SZM和NZM陶瓷属于空间群为R 3 ¯ c 的六方晶系。扫描电子显微镜结果显示这两种陶瓷在各自的最佳烧结温度下烧结时具有致密且均匀的微观结构。此外，在 875 °C 和 850 °C 下烧结 4 小时的 SZM 和 NZM 陶瓷具有优异的微波介电性能，介电常数 er ~ 11.0、品质因数 Qxf ~ 74,012 GHz (10.6 GHz) 和谐振温度系数频率 τf ~ − 45.3 ppm/°C，和 er ~ 10.8，Qxf ~ 58,942 GHz (10.5 GHz)，和 τf ~ − 40.9 ppm/°C，分别。这些实验结果显示了低温共烧陶瓷技术应用的巨大潜力。