Sintering behavior, phase composition, microstructure and dielectric properties of SrSm2O4 microwave ceramics

In this paper, the microwave dielectric properties of SrSm2O4 ceramics were reported, and the relationship between the phase composition, structure, density, microscopic morphology and properties is investigated. The SrSm2O4 ceramics have a good crystal structure corresponding to the standard card of PDF:032-1254. After sintered at the optimum temperature of 1400 degrees C, the ceramic grains are closely connected, with clear grain boundaries and uniform grains are observed. The bulk density of SrSm2O4 ceramics sintered at 1400 degrees C for 4 h is 6.35 g/cm3 and the relative density reaches 91.63 %. Finally, the ceramics sintered at 1400 degrees C have the best performances of Qxf = 40646 GHz (at 8.64 GHz), epsilon r = 18.16, tau f= -17.6 ppm/degrees C. The results show that SrSm2O4 has a good application prospect in 5 G/5 G+ field. (c) 2022 Published by Elsevier B.V.