Microstructure and microwave dielectric characteristics of ZnTi(Nb1-xSbx)(2)O-8 ceramics

作者：Li Lingxia^*; Cal Haocheng; Ren Qun; Sun Hao; Gao Zhengdong

来源：Ceramics International, 2014, 40(8): 12213-12217.

DOI：10.1016/j.ceramint.2014.04.063

• Dielectric properties
• Electroceramics
• Crystal structure
• ZnTiNb2O8

ZnTiNb2O8 is a promising new material suitable for the applications at microwave frequencies. The effects of Sb substitution on phase constitution, phase structures and properties of ZnTiNb2O8 were investigated. The unknown Columbite-type phase was determined as (Zn0.75TiO0.25)(Nb0.75Ti0.25)O-6. The Qf is closely related to the packing fraction of structure and the amount of each phase. With the decrease of packing fraction and the content of Columbite phase, the Qf decreased. The tau(f) is related to the cation ordering of (Zn0.75Ti0.25)(Nb0.75Ti0.25)(2)O-6 and cation bond valence of ZnTiNb2O8. The tau(f), variation is affected by the variation of each phase, and the variation of (Zn0.75Ti0.25) (Nb0.75Ti0.25)(2)O-6 played a more important role. The typical values of epsilon=33.84, Qf= 31,000 GHz, tau(f)= -67.91 x 10(-6)/degrees C were obtained for ZnTi (Nb1-xSbx)(2)O-8 (x=0.05) specimens sintered at 1100 degrees C for 6 h.

• 出版日期2014-9
• 单位天津大学