A novel low loss microwave dielectric ceramics ZnTi0.6Sn0.4Nb2O8 with wolframite structure

• Wolframite structure ZnTi0.6Sn0.4Nb2O8 was firstly prepared at 1200 °C for 4 h.
• The microwave properties were εr=24.61, Q·f =69,500 GHz and τf=−2.67 ppm/°C.
• The bond energy was used to characterize the intrinsic loss of ZnTi0.6Sn0.4Nb2O8.

Wolframite-structure ZnTi0.6Sn0.4Nb2O8 was firstly prepared by the conventional solid-state method. X-ray diffraction patterns showed that the samples exhibited wolframite structure instead of ixiolite-structure of ZnTiNb2O8. Microwave dielectric properties of ZnTi0.6Sn0.4Nb2O8 ceramics exhibited a significant dependence on sintering characteristics and crystal structure. The phase transition in ZnTi0.6Sn0.4Nb2O8 ceramics played an important role in reducing dielectric loss. In addition, the bond energy of ceramics was also reported for the first time to analyze intrinsic loss. Typically, the ZnTi0.6Sn0.4Nb2O8 ceramics sintered at 1200 °C for 4 h exhibited excellent microwave dielectric properties with εr=24.61, Q·f =69,500 GHz and τf=−2.67 ppm/°C.