Ba_1+1/M[Si₂O_5+1/M] low-permittivity microwave dielectric ceramics are prepared using the conventional solid-state method. Pure phases are obtained in barium silicates with M = 1, 3, 4, 5, and ∞, except for M = 7, in which two phases, Ba₅Si₈O₂₁ and BaSi₂O₅, are observed. As the complexity of the crystal structure described by the Shannon information per reduced unit cell increases, the τ_f value tends to change from a negative to a positive value, except for M = 5, which has the highest complexity. A single Ba₅Si₈O₂₁ phase with ε_r anomaly peak at −180°C exhibits a rare positive τ_f value (+25 ppm/°C), which is a novel temperature compensator.

中文翻译：

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不同Ba / Si比的硅酸钡微波介电陶瓷的τf值可控

使用常规的固态方法制备Ba _{1 + 1 / M} [Si ₂ O _{5 + 1 / M} ]低介电常数微波介电陶瓷。纯相位与钡硅酸盐获得的中号= 1，3，4，5，和∞，除了中号= 7，其中两个阶段，钡₅的Si ₈ ö ₂₁和的BaSi ₂ ö ₅，观察到。随着每个缩小的晶胞由Shannon信息描述的晶体结构的复杂性增加，除M之外，_τf值趋于从负值变为正值。= 5，具有最高的复杂度。在-180°C时具有_εr异常峰的单个Ba ₅ Si ₈ O ₂₁相表现出罕见的正_τf值（+25 ppm /°C），这是一种新型的温度补偿器。