A novel low-temperature fired La₂Zr₃(MoO₄)₉ microwave dielectric ceramic was successfully fabricated by a conventional solid-state reaction method. The powder compact was densified in air in the temperature range of 700–800 °C for 4 h. X-ray diffraction analysis indicated that all studied samples presented a single phase structure. Rietveld refinement results further confirmed that La₂Zr₃(MoO₄)₉ belonged to a trigonal system with space group R$\overline{3}$c. Scanning electron microscopy results revealed dense and homogeneous microstructure of La₂Zr₃(MoO₄)₉ ceramics as sintered in the temperature range of 725–800 °C. The La₂Zr₃(MoO₄)₉ ceramic sintered at 775 °C for 4 h possessed excellent microwave dielectric properties of relative permittivity ε_r ∼ 10.8, quality factor Qxf ∼ 50,628 GHz (at 10.45 GHz), and temperature coefficient of the resonant frequency τ_f ∼ −38.8 ppm/°C, showing great potentials for applications of low temperature co-fired ceramic technology.

通过常规的固态反应方法成功地制备了新型的低温烧制的La ₂ Zr ₃（MoO ₄）₉微波介电陶瓷。粉末压块在700-800°C的温度下在空气中致密化4 h。X射线衍射分析表明，所有研究的样品均呈现单相结构。Rietveld精炼结果进一步证实La ₂ Zr ₃（MoO ₄）₉属于具有空间群R的三角系统$\overline{3}$c。扫描电子显微镜结果显示，在725–800°C的温度范围内烧结的La ₂ Zr ₃（MoO ₄）₉陶瓷具有致密且均匀的微观结构。在La ₂ Zr的₃（的MoO ₄）₉陶瓷烧结在775℃下4小时所具有的相对介电常数ε的优良微波介电性能_{- [R}  〜10.8，品质因数QXF〜50628千兆赫（在10.45千兆赫），和谐振的温度系数频率τ _˚F  〜-38.8 PPM /℃，示出了用于低温应用的巨大潜力共烧陶瓷技术。