A new series of Li₃Ba₂La_3(1-x)Y_3x(MoO₄)₈ microwave dielectric ceramics were prepared by a conventional solid-state reaction method. The Rietveld refinement results further confirm that Li₃Ba₂La_3(1-x)Y_3x(MoO₄)₈ belongs to a monoclinic system with space group C2/c. Scanning electron microscopy results reveal that Li₃Ba₂La_3(1-x)Y_3x(MoO₄)₈ ceramics can be well sintered at a low sintering temperature. In addition, the permittivity (ε_r) of Li₃Ba₂La_3(1-x)Y_3x(MoO₄)₈ ceramics was found to decrease gradually with increasing substitution content of Y³⁺, while the quality factor (Qxf) and temperature coefficient of resonant frequency (τ_f) increase with x monotonously. The x = 0.4 ceramic sintered at 700 °C for 4 h possesses optimum microwave dielectric properties of ε_r ∼ 14.4, Qxf ∼ 14,994 GHz (at 9.0 GHz) and τ_f ∼ + 6.9 ppm/°C. Particularly, no chemical reaction between the matrix phase and Ag metal suggests that the Li₃Ba₂La_1.8Y_1.2(MoO₄)₈ ceramic might be a promising candidate for low-temperature co-fired ceramic applications.

采用常规固相反应法制备了一系列新的Li ₃ Ba ₂ La _3（1-x） Y _3x（MoO ₄）₈微波介电陶瓷。Rietveld细化结果进一步证实Li ₃ Ba ₂ La _3（1-x） Y _3x（MoO ₄）₈属于具有C2 / c空间群的单斜晶系。扫描电子显微镜结果表明，Li ₃ Ba ₂ La _3（1-x） Y _3x（MoO ₄）₈陶瓷可以在较低的烧结温度下很好地烧结。另外，发现Li ₃ Ba ₂ La _3（1-x） Y _3x（MoO ₄）₈陶瓷的介电常数（_εr）随着Y ³⁺取代含量的增加而逐渐降低，而品质因数（Qxf）谐振频率的温度系数（_τf）随x单调增加。在x = 0.4的陶瓷在700℃下烧结4小时具有ε的最佳微波介电性能_{- [R}〜14.4，〜QXF GHz的14994（在9.0千兆赫）和τ _˚F〜+ 6.9 ppm /°C。特别地，基体相与Ag金属之间没有化学反应表明Li ₃ Ba ₂ La _1.8 Y _1.2（MoO ₄）₈陶瓷可能是低温共烧陶瓷应用的有希望的候选者。