摘要
通过DSC、XRD、SEM、EDS等测试手段,研究了钙铝硼硅/氧化铝系玻璃-陶瓷一个典型组成的致密化过程,并讨论了在这过程中物相、微观结构以及介电性能的变化规律。研究结果表明:在800～900℃烧成范围内,材料先致密化后析晶;825℃时,材料已烧结致密化,介电常数达到其最大值;850℃时,玻璃中析出钙长石晶体,介电损耗大幅下降;随着温度的进一步提高,材料结构变得松散,介电损耗略有增大。1 MHz下,850℃所烧试样介电常数为7.9,介电损耗小于1×10^(-3),是一种性能优良的LTCC材料。
The densification process,phase shift,microstructure and dielectric properties of CABS/ Al_2O_3 system glass -ceramics were studied using DSC,XRD,SEM and EDS.The results show that densification has been achieved at 825℃and dielectric constant（ε_r） gets its maximum.At 850℃Anorthite precipitates from the matrix phase,which leads to the significant decrease of dielectric loss（tanδ）.With heat -treatment temperatures increasing,tanδincreases slightly due to the loose microstructure.The obtained glass - ceramics at 850℃which haveε_r of 7.9 and tanδless than 1×10^（-3）can be used as promising LTCC materials.
出处
《功能材料与器件学报》
CAS
CSCD
北大核心
2010年第6期575-579,共5页
Journal of Functional Materials and Devices
基金
国家"863"项目:2007AA03Z455
关键词
玻璃-陶瓷
致密化
析晶
LTCC材料
glass-ceramics
densification
precipitation
LTCC materials
