【摘要】 为获得低介电损耗、高耐压强度的Al₂O₃基低温共烧陶瓷（LTCC）材料，采用固相法制备了x（6La₂O₃·24CaO·50B₂O₃·20SiO₂）（LCBS）+（1–x）Al₂O₃玻璃/陶瓷。通过X射线衍射仪、扫描电子显微镜、矢量网络分析仪、高压击穿试验仪、高温介电温谱仪对烧结样品的结构和性能进行了表征。结果表明：添加适量的LCBS玻璃粉有助于提升材料的致密性、降低介电损耗、提高击穿场强。同时，复阻抗谱分析表明，LCBS玻璃的加入可以显著提高玻璃/陶瓷的电阻率和活化能。当玻璃含量（摩尔分数）为44%时，850℃烧结0.5 h，可获得性能优异的LTCC陶瓷材料G44:ε_r=7.14,Q×f=5 769 GHz（f=13 GHz）,E_b=57.44 kV/mm。更多还原

【Abstract】 To obtain Al₂O₃-based low-temperature co-fired ceramic （LTCC） materials with low dielectric loss and high breakdown strength,glass/ceramics of x（La₂O₃-CaO-B₂O₃-SiO₂）（LCBS）+（1–x）Al₂O₃ were synthesized by a solid-state method.The structure and properties of the sintered samples were characterized by X-ray diffractometer,scanning electron microscope,vector network analyzer,high voltage breakdown instrument,and high-temperature dielectric spectrometer.The results show that adding an appropriate amount of LCBS glass powder can increase the density,reduce the dielectric loss and improve the breakdown strength of the composites.Moreover,based on the complex impedance spectrum analysis,the addition of LCBS can significantly increase the resistivity and activation energy of glass/ceramics.When Al₂O₃ ceramic with 44%（mole fraction） LCBS glass （abbreviated G44） is sintered at 850℃for 0.5 h,a LTCC ceramic material with the superior properties （i.e.,ε_r=7.14,Q×f=5 769 GHz at f=13 GHz,and E_b=57.44 kV/mm） can be obtained.更多还原