不同粒径α-Al_2O_3对CABS玻璃-陶瓷的性能影响

IMPACT OF DIFFERENT PARTICLE SIZE α-Al_2O_3 ON PROPERTIES OF GLASS-CERAMIC

初步探索了陶瓷粉粒度对钙铝硅硼玻璃(CABS)-陶瓷烧结性能和介电性能的影响。从而理解致密化机制以及玻璃对不同粒径Al2O3润湿情况。玻璃与不同粒径的氧化铝粉混合均匀,流延成型。结果表明:当陶瓷粉D50为0.83um时,玻璃-陶瓷的介电常数较小,介电损耗较大;当Al2O3粉D50为3.26um时,样品的介电性能显著提升,且介电常数为7.9,介电损耗小于2×10-3。

For the effect of particle size of alumina on electrical properties and microstructure of glass-ceramics composites.To understand the mechanisms of densification,its wetting behavior and viscosity as a function of temperature were investigated.As developed glass was mixed with an alumina powder and milled down to average grain sizes of 0.83um,3.26um,and 3.46um,respectively.From these composite powders,slurries were prepared and tape cast.It shows that the alumina powder D50 for 0.83um,having a lower dielectric constant and dielectric constant badly;however,when the Al2O3 powder D50 to 3.26um,the Glass-ceramic have be improved the dielectric constant and loss of the composites obviously,its has εr of 7.9 and tanδ less than 2×10^-3.