Abstract
The 0·15 THz resonator based on the (Mg0·95Ca 0·05)TiO3 (abbreviated as 95MCT hereafter) ceramic was designed, and the dielectric property of 95MCT for application has been studied. La2O3 and Nb2O5 were selected as liquid sintering aids to lower the sintering temperature. X-ray diffraction patterns indicated that MgTi2O5 secondary phase could be effectively suppressed by La2O3 and Nb2O5 additions. When the Nb2O5+La2O3 codoping content was 0·25 wt-%, the ceramic could be densified at 1320°C and also has good dielectric behaviours of Qf = 69720 GHz (6·8 GHz), ϵr = 20·18 and τf = −7·56 ppm °C−1. The terahertz resonator designed at 0·15 THz exhibited that with the increasing height of inner cylinder, the two modes’ resonance frequencies decreased.
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