New dielectric material system of Nd(Mg_1/2Ti_1/2)O₃-CaTiO₃ with V₂O₅ addition for microwave applications

The effects of sintering aids additives on the microstructures and microwave dielectric properties of (1 - x)CaTiO₃-xNd(Mg_1/2Ti_1/2)O₃ ceramics were investigated. The effects of V₂O₅ additions on the microwave dielectric properties and the microstructures of (1 - x)CaTiO₃-xNd(Mg_1/2Ti_1/2)O₃ ceramics have been investigated. Doping with 0.5 wt% V₂O₅ can effectively promote the densification and the microwave dielectric properties of (1 - x)CaTiO₃-xNd(Mg_1/2Ti_1/2)O₃. It is found that CaTiO₃-Nd(Mg_1/2Ti_1/2)O₃ ceramics can be sintered at 1325 °C due to the liquid phase effect of a V₂O₅ additions. The dielectric constant decreases from 140 to 28 as x varies from 0.1 to 1.0. The microwave dielectric properties indicate the possibility of a phase transformation for x between 0.3 and 0.5. A low-pass filter is designed and simulated using the proposed dielectric to study its performance.