Effects of CuO-V{sub}2O{sub}5-Bi{sub}2O{sub}3 Additions on the Microstructure and Microwave Dielectric Properties of 0.42ZnNb{sub}2O{sub}6-0.58TiO{sub}2 Ceramics

摘要

The effects of additions on the microstructure and microwave dielectric properties of 0.42ZnNb{sub}2O{sub}6-0.58TiO{sub}2 (ZNT) ceramics were investigated systematically. The sintering temperature of ZNT ceramics doped with different amounts of CuO, Bi{sub}2O{sub}3 and V{sub}2O{sub}5 can be effectively reduced. The phase of doped samples was studied compared to the undoped ZNT ceramics. For densified ZNT ceramics with the increasing amount of dopant CuO-Bi{sub}2O{sub}3-V{sub}2O{sub}5, the dielectric constants (ε{sub}r) of densified samples ranges from 38 to 42, the Q·f values decrease evidently and ranges from 13300 GHz to 5000 GHz and the τ{sub}f values are shifted toward negative.