Ag2O-Nb2O5-Ta2O5陶瓷系统(简称ANT)是一种新型的高频高介陶瓷材料,可以在1150℃以下进行中温烧结。在本系统中,添加Na+离子置换ANT系统中的A位Ag+离子形成ANNT系统,通过XRD,SEM以及能谱分析发现,少量Na+添加,导致晶格参数下降,即八面体空隙的体积将减小,从而抑制了Nb5+的松弛极化,有效地降低了ANT系统的损耗因子,使系统的介电性能达到:ε>500, tgδ≤5×10-4,容量温度系数αc=+12ppm/℃,ρv>1012Ω·cm。
he Ag2O-Nb2O5-Ta2O5 (ANT) system is a novel high frequency high permittivity ceramic material which can be sintered below 1150℃. The doping of Na+ can replace A
site ions (Ag+) in ANT to form ANNT system. In this paper proper Na+ ions were introduced into ANT system. XRD, SEM, and energy spectrum analysis show that proper Na+ addition makes the
lattice parameter reduced, i.e. the capacity of octahedron reduced, the dielectric dissipation factor of the system is improved efficiently because of depression of relaxation polarization of Nb5+, and
the dielectric properties of the system are as follows: ε>500, tgδ≤5×10-4,
αc=+12ppm/℃,ρv>1012Ω·cm.
参考文献
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