保温时间对钙钡硼硅复相陶瓷性能的影响

Effects of holding time on the properties of Ca-Ba-B-Si composite ceramics

通过对钙钡硼硅玻璃与氧化铝的混合物进行烧结,制备了可用于低温共烧陶瓷基板的硼硅酸盐玻璃/α-Al2O3系复相陶瓷。研究了保温时间对所制复相陶瓷的微观结构、烧结性能和介电性能的影响。结果表明:随着保温时间的延长,所制复相陶瓷的体积密度、吸水率和介电常数先增大后减小,而介质损耗则是先减小后增大。于850℃烧结、保温20 min制得的复相陶瓷的性能最佳,其体积密度为3.12 g.cm–3,吸水率为0.11%,10 MHz下的相对介电常数和介质损耗分别为7.88和1.0×10–3。

Ca-Ba-B-Si glass/a-Al2O3 composite ceramics for low temperature co-fired ceramics （LTCC） substrate were prepared by sintering the mixture of Ca-Ba-B-Si glass and alumina. The effects of holding time on the microstructure, sintering properties and dielectric properties of the composite ceramics were investigated. The results show that the density, water absorption rate and permittivity of the composite ceramics increase first and then decrease with increasing holding time, while the dielectric loss decreases first and then increases. The composite ceramics prepared through sintering at 850℃ for 20 min show a better performance in comparison to other samples： a bulk density of 3.12 g ·cm-3, a water absorption rate of 0.11%, a relative permittivity of 7.88 and a dielectric loss of 1.0 × 10-3 at 10 MHz.