Sr₂MgWO₆ (SMW) is a typical perovskite oxide compound, but there has been little research on the effects of processing on its dielectric properties. In this work, SMW ceramics were prepared by solid-state synthesis with sintering at 1450 °C, 1475 °C, 1500 °C and 1525 °C, respectively. XRD results confirmed that the samples possessed double perovskite structure (Fm-3m). The Raman and FTIR spectra were used to study the lattice vibrational modes. The FPSQ model was used to obtain the fitting curves of the FTIR spectra and derive the intrinsic properties of the material that were found to be in agreement with the measured data. The structure-property relationships were successfully established based on the Raman mode results. The optimal sintering temperature of SMW ceramics was identified as 1475 °C due to the excellent performances characteristics (ε_r = 16.97, Q × f = 23,872 GHz, τ_f = −35.38 ppm/°C) obtained at this temperature. This study explored the relationships among the crystal structures, lattice vibrational characteristics and dielectric properties of SMW ceramics, so as to further understand their dielectric response mechanism and lay a solid theoretical foundation for the development of microwave ceramics.

锶₂ MgWO ₆(SMW)是一种典型的钙钛矿氧化物化合物，但对其介电性能的影响研究却很少。在这项工作中，SMW 陶瓷是通过固态合成制备的，分别在 1450 °C、1475 °C、1500 °C 和 1525 °C 下烧结。XRD结果证实样品具有双钙钛矿结构（Fm-3m）。拉曼光谱和 FTIR 光谱用于研究晶格振动模式。FPSQ 模型用于获得 FTIR 光谱的拟合曲线，并推导出与测量数据一致的材料的固有特性。基于拉曼模式结果成功建立了结构-性能关系。由于优异的性能特点，SMW陶瓷的最佳烧结温度被确定为1475°C（ε _r  = 16.97，Q × f  = 23,872 GHz，τ _f  = -35.38 ppm/°C) 在该温度下获得。本研究探讨了SMW陶瓷的晶体结构、晶格振动特性与介电性能之间的关系，以进一步了解其介电响应机制，为微波陶瓷的发展奠定坚实的理论基础。