Microwave and terahertz dielectric properties of MgTiO3–CaTiO3 ceramics

Abstract The THz dielectric properties of MgTiO 3 –CaTiO 3 ceramics are reported. The ceramics were prepared via a solid-state reaction route and the sintering conditions were optimized to obtain ceramics with high permittivity and low loss in the terahertz frequency domain. The amount of impurities (MgTi 2 O 5 ) and grain size increased with increasing sintering temperature. The dielectric properties improved with increasing density, and the best terahertz dielectric performance was obtained at 1260 °C, with a permittivity of 17.73 and loss of 3.07×10 −3 . Ceramics sintered above 1260 °C showed a sharp increase in loss, which is ascribed to an increase in the impurity content.

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