Preparation and properties of MCT ceramics for RF and THz applications

Dielectric ceramics of 0.95MgTiO
3
−0.05CaTiO
3
were prepared via a solid-state reaction method. It is evident that high permittivity and low loss are correlated to high density and high purity in the THz frequency domain. Best dielectric properties were obtained for samples sintered at 1260°C, which is attributable to their high density and high purity. However, the dielectric properties of the ceramics deteriorated when sintered above 1260°C, which is attributed to the significantly increased content of second phase produced by ‘over’ sintering.