LiGa₅O₈ ceramics with inverse spinel structure were prepared in a temperature range of 1200–1300 ℃ by solid-state reaction method. LiGa₅O₈ ceramics crystallized in cubic structure with space group P4₃32, in which Li⁺ and Ga³⁺ distributed in the octahedral B sites with 1:3 ordering. The optimal microwave dielectric properties with ε_r =10.51, Q × f = 127,040 GHz, and τ_f = –60.16 ppm/℃ were achieved at 1260 ℃ for 6 h. Microwave dielectric properties were discussed in combination with the intrinsic characteristics of crystal structure by packing fraction, Raman spectra, and infrared reflectivity spectrum. Additionally, CaTiO₃ was used to suppress τ_f of LiGa₅O₈ ceramics to near zero, and optimized performances of ε_r = 12.79, Q × f = 109,752 GHz and τ_f = +4.07 ppm/℃ were obtained for 0.94LiGa₅O₈‐0.06CaTiO₃ ceramics at 1260 ℃. These bright spots make LiGa₅O₈ ceramic a potential candidate for 5 G and millimeter wave technology.

采用固相反应法在1200〜1300℃的温度范围内制备了具有尖晶石结构的LiGa ₅ O ₈陶瓷。LiGa ₅ O ₈陶瓷以立方结构结晶，空间群为P 4 ₃ 32，其中Li ⁺和Ga ³⁺以1：3的顺序分布在八面体B位。具有最佳微波介电性能ε _{- [R} = 10.51，Q×F = 127040千兆赫，和τ _˚F = -在1260℃加热6 h达到60.16 ppm /℃。通过堆积分数，拉曼光谱和红外反射率光谱，结合晶体结构的固有特性，讨论了微波介电性能。此外，的CaTiO ₃被用来抑制τ _˚F LIGA的_5个ø ₈的陶瓷到接近零，和优化的性能ε _{- [R}  = 12.79，Q×˚F  = 109752 GHz和τ _˚F = 4.07 PPM /℃是为获得0.94LiGa ₅在1260℃下使用O ₈ -0.06CaTiO ₃陶瓷。这些亮点使LiGa ₅ O ₈ 陶瓷是5 G和毫米波技术的潜在候选者。