Novel series of MLa₂WO₇(M = Sr, Ba) ceramics were prepared via a traditional solid-state reaction method. The sintering characteristic, crystal structures, micromorphology and microwave dielectric performances of systems were systematically investigated. X-ray diffraction (XRD) and Rietveld refinement display that both SrLa₂WO₇(SLW) and BaLa₂WO₇(BLW) ceramics are monoclinic structure with Fdd (No. 14) space group. SLW and BLW ceramics have high relative density (more than 94%). The SLW ceramics sintered at 1400 °C exhibited good microwave dielectric performances with Ɛ_r = 23.2, Q × f = 29,720 GHz, τ_f = − 127 ppm/°C and the BLW ceramics sintered at 1300 °C had excellent properties of Ɛ_r = 25.3, Q × f = 36,473 GHz, τ_f = − 108 ppm/°C. These results show that MLa₂WO₇(M = Sr, Ba) ceramics could be candidates for microwave devices.

 通过传统的固态反应方法制备了一系列新颖的M La ₂ WO ₇（M = Sr，Ba）陶瓷。系统地研究了系统的烧结特性，晶体结构，微观形貌和微波介电性能。X射线衍射（XRD）和Rietveld精炼表明，SrLa ₂ WO ₇（SLW）和BaLa ₂ WO ₇（BLW）陶瓷均为具有Fdd（第14号）空间群的单斜晶结构。SLW和BLW陶瓷具有较高的相对密度（超过94％）。在1400℃下烧结的陶瓷SLW显示出良好的微波介电性能与ɛ _ř= 23.2，Q  ×  ˚F = 29720千兆赫，τ _˚F = - 127 PPM /℃，并在1300℃下烧结的BLW陶瓷具有优异的性质ɛ _{- [R} = 25.3，Q  ×  ˚F = 36473千兆赫，τ _˚F = - 108 ppm的/℃。这些结果表明，M La ₂ WO ₇（M = Sr，Ba）陶瓷可能是微波设备的候选材料。