摘要
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A+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,tg δ≤5×10-4,容量温度系数αc=+12ppm/℃,ρv>1012Ωcm。
The Ag2O-Nb2O5-Ta2O5 (ANT) system is a novel high frequency high permittivity ceramic material which can be sintered below 1150degreesC. 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: epsilon > 500, tgdelta less than or equal to 5 X 10(-4), alpha(c) = +12ppm/degreesC, rho(v) > 10(12)Omega(.)cm.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第4期823-826,共4页
Journal of Inorganic Materials
基金
国家自然科学基金(50172035)
关键词
高频高介
ANT
松弛极化
介电损耗
high frequency high permittivity
ANT
relaxation polarization
dissipation factor
