The sintering behavior and dielectric properties of La₂O₃–B₂O₃–CaO–P₂O₅ (LBCP) glass and La₂O₃–B₂O₃–CaO–P₂O₅ glass/Al₂O₃ (LBCP/A) composites have been investigated. The results show that the major crystalline phase of LBCP glass–ceramics sintered at 625 °C is low-temperature LaBO₃ phase, and it transits to high-temperature LaBO₃ phase with the sintering temperature up to 850 °C. With the increase of La/B ratio in LBCP glass, the crystallization tendency of LaBO₃ phase increases. LBCP/A composites could be well sintered at 850 °C for 2 h. The bulk density of LBCP/A composites increases with the glass content rising and then decreases owing to foaming. The main crystalline phases of LBCP/A composites are LaBO₃, CaAl₂B₂O₇, and Al₂O₃. Dielectric properties are related to the glass composition and content, which determines the density of the composites. The optimized dielectric properties of LBCP/A composites are dielectric constant of 7.108 and dielectric loss of 1.024 × 10^–3 in 50LBCP3/50A, which nicely meet the requirements of LTCC substrate materials.

La ₂ O ₃ –B ₂ O ₃ –CaO–P ₂ O ₅（LBCP）玻璃和La ₂ O ₃ –B ₂ O ₃ –CaO–P ₂ O ₅玻璃/ Al ₂ O ₃的烧结行为和介电性能（LBCP / A）复合材料已被研究。结果表明，在625°C下烧结的LBCP玻璃陶瓷的主要晶相为低温LaBO ₃相，并转变为高温LaBO ₃相的烧结温度高达850°C。随着LBCP玻璃中La / B比的增加，LaBO ₃相的结晶趋势增加。LBCP / A复合材料可以在850°C下充分烧结2 h。LBCP / A复合材料的堆积密度随着玻璃含量的增加而增加，然后由于发泡而降低。LBCP / A复合材料的主要晶相为LaBO ₃，CaAl ₂ B ₂ O ₇和Al ₂ O ₃。介电性能与玻璃的组成和含量有关，玻璃的含量和含量决定了复合材料的密度。LBCP / A复合材料的最佳介电性能为7.108的介电常数和1.024×10的介电损耗50LBCP3 / 50A中为^–3，很好地满足了LTCC基板材料的要求。