In this work, the sintering temperatures of Mg₂Al₄Si₅O₁₈ ceramics was reduced to ∼ 900°C by adding BaCu(B₂O₅) (BCB). Mg₂Al₄Si₅O₁₈ reacts with BCB to form the second phase BaAl₂Si₂O₈. As the sintering temperature was 950°C, the second phase transformed from hexagonal BaAl₂Si₂O₈ to monoclinic BaAl₂Si₂O₈ with increasing BCB content. When the BCB content was 15 wt.%, the second phase formed from hexagonal BaAl₂Si₂O₈ to monoclinic BaAl₂Si₂O₈ with increasing sintering temperature. Especially, the sintering temperature of Mg₂Al₄Si₅O₁₈ + 30 wt.%BCB ceramic was reduced to 900°C and the ceramics exhibited good microwave dielectric properties with Q × f = 21,300 GHz, ε_r= 3.4 and τ_f = − 30 ppm/°C. The results showed that Mg₂Al₄Si₅O₁₈-BCB ceramics are candidates for LTCC devices.

中文翻译：

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低温共烧Mg 2 Al 4 Si 5 O 18 -BaCu（B 2 O 5）陶瓷的微波介电性能

在这项工作中，通过添加BaCu（B ₂ O ₅）（BCB）将Mg ₂ Al ₄ Si ₅ O ₁₈陶瓷的烧结温度降低到约900°C 。Mg ₂ Al ₄ Si ₅ O ₁₈与BCB反应形成第二相BaAl ₂ Si ₂ O ₈。当烧结温度为950℃时，第二相从六方BaAl ₂ Si ₂ O ₈转变为单斜BaAl ₂ Si ₂ O _8。随着BCB含量的增加。当BCB含量为15wt。％时，随着烧结温度的升高，第二相由六方BaAl ₂ Si ₂ O _8形成为单斜BaAl ₂ Si ₂ O ₈。特别是，对烧结温度的Mg ₂的Al ₄的Si ₅ ö ₁₈  + 30wt。％的BCB陶瓷降低到900℃和陶瓷显示出具有良好的介电性能Q  ×  ˚F  = 21300千兆赫，ε _{- [R} = 3.4和τ _˚F  =-30 ppm /°C。结果表明，Mg ₂ Al ₄Si ₅ O ₁₈ -BCB陶瓷是LTCC器件的候选材料。