Preparation, Performances and Reaction Process of NiZrNb_2O_8 Microwave Dielectric Ceramics

摘要

Microwave dielectric ceramics have great potentials in the fields of modern communication technology application. However, the effects of processing of solid reaction on the crystal structure and properties of NiZrNb_2O_8 has not been reported. In this paper, theNiZrNb_2O_8 ceramic was prepared using different raw materials. The solid reaction process, crystal structure, and dielectric properties of the NiZrNb_2O_8 ceramics were investigated. The X-ray diffractometer (XRD) results showed that the solid reaction of NiZrNb_2O_8 could be divided into two steps using NiO, ZrO_2 and Nb_2O_6 as raw materials. Scanning electron microscope (SEM) analysis results showed that the surface of NiZrNb_2O_8 prepared from NiNb_2O_6and ZrO_2was more compact. The optical density of the samples reached 99.28% of the theoretical value. And the dielectric constant (ε_r), quality factor (Q × f), the temperature coefficient of resonant (τ_f) reached 23.6, 37237 GHz, -7.796 ppm/°C, respectively.