摘要
采用在CaO-B2O3-SiO2（CBS）玻璃中添加硼硅酸玻璃的方式制备了低温烧结的CBS复相玻璃陶瓷,系统地研究了其对CBS玻璃陶瓷10MHz下的介电常数及热膨胀系数的影响规律。利用DSC,XRD和SEM微观结构分析方法,研究了试样的性能与结构的关系。研究结果表明：硼硅酸玻璃与CBS玻璃具有很好的相容性,硼硅酸玻璃的添加量在0～40%（质量分数,下同）的范围内均可在850℃烧结。硼硅玻璃能有效降低体系的介电常数,实现介电常数在5.6～6.6范围内可调;硼硅玻璃的添加量小于20%时,膨胀系数增加幅度较小,随着硼硅玻璃量的增加,膨胀系数显著增大,其原因是随着硼硅酸玻璃添加量的增加,生成了具有低介电常数、高膨胀系数的-αSiO2。
CaO-B2O3-SiO2（CBS） glass-ceramic composites were prepared by adding borosilicate glass.The effects of borosilicate glass on the dielectric properties and coefficient of thermal expansion coefficient（CTE） were investigated.The relationships between properties and structures were studied by the aid of TG-DSC,XRD and SEM.The results show that the two kinds of glass are compatible with each other with the borosilicate glass content of 0-40%（mass fraction,the same below）.The composite powder can be sintered at 850℃.The dielectric constant decreases with the increase of borosilicate glass content.The dielectirc constant can be adjusted in the range of 5.6-6.6.The CTE increases slowly when borosilicate glass content was less than 20% and increased rapidly with content of 20%-40%.The result is due to the formation of the new phaseα-SiO2 with low dielectric constant and high CTE.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2007年第11期41-44,共4页
Journal of Materials Engineering
基金
国防科工委基金资助项目
