Study on microwave dielectric properties of new microwave dielectric ceramics CaNd2ZnTi2O9

This research demonstrates a novel class of CaNd 2 ZnTi 2 O 9 microwave dielectric ceramic using the traditional solid-state methods. Analysis by XRD and Rietveld refinement revealed that the CaNd 2 ZnTi 2 O 9 sample is single-phase and possesses an orthorhombic crystal configuration with a Pbnm (62) space group. SEM observation confirmed the double perovskite structure of CaNd 2 ZnTi 2 O 9 ceramics and the relative density of the ceramic samples reached 95.8%. Additionally, the τ f of CaNd 2 ZnTi 2 O 9 sample is affected by V Ti–O bond valence. CaNd 2 ZnTi 2 O 9 samples sintered at 1430 °C show significant microwave dielectric properties ( ε r  = 35.41, Q  ×  f  = 15,440 GHz, τ f  =  −S54.8 ppm/°C).