Novel ultra-low loss NaLn(WO₄)₂ (Ln = La (NLW), Nd (NNW), Sm (NSW)) (NLnW) microwave dielectric ceramics were prepared by a reaction sintering method. The sintering process of the samples was investigated by TG-DSC. XRD refinement and Raman spectra results ascertained that the NLnW ceramics have scheelite structure with space group of I4₁/a. The microwave dielectric properties of NLnW ceramics and the relationship between the structure and performances were studied. The relationship between lattice vibration and Qf were analyzed by Raman spectroscopy. Especially, the NSW ceramics sintered at 1100 ℃ for 4 h show outstanding microwave dielectric properties of ε_r = 10.07, Qf = 73,734 GHz (at 12.21 GHz), τ_f = -42.6 ppm/°C, which providing a promising application in fifth generation communications.

采用反应烧结法制备了新型超低损耗NaLn(WO ₄ ) ₂ (Ln=La(NLW)、Nd(NNW)、Sm(NSW))(NLnW)微波介质陶瓷。通过TG-DSC研究了样品的烧结过程。 XRD精修和拉曼光谱结果确定NLnW陶瓷具有空间群为I 4 ₁ /a的白钨矿结构。研究了NLnW陶瓷的微波介电性能及其结构与性能的关系。通过拉曼光谱分析了晶格振动与Qf之间的关系。特别是，在1100 ℃下烧结4 h的NSW陶瓷表现出出色的微波介电性能，ε _r  = 10.07，Qf  = 73,734 GHz（12.21 GHz时），τ _f = -42.6 ppm/°C，这在第五方面提供了良好的应用前景。一代通信。