Lattice vibrational characteristics, crystal structure, and dielectric properties of single-phase Sr(Mg1/2Mo1/2)O3 microwave dielectric ceramic

Sr(Mg1/2Mo1/2)O-3 (SMM) microwave dielectric ceramic was prepared by a solid-state sintering method. X-ray diffraction shows that the sample is a single-phase SMM with a tetragonal double perovskite structure (Fm-3m). Raman scattering and FTIR spectroscopy analyze the vibration characteristics of lattice. The far-infrared spectra of SMM ceramics fitted by a FPSQ model are obtained, epsilon(r) = 7.39 and tan delta = 8.19 x 10(-4). The theoretical properties calculated by the C-M and damping equations are of epsilon(r) = 7.03 and tan delta = 6.19 x 10(-4), which agrees well with the experimental values (epsilon(r) = 7.84 and tan delta = 6.59 x 10(-4)). The results show that the stretching vibration of Mg/MoO6 has the greatest influence on the dielectric properties of the SMM sample.

Automated summary

Sr(Mg1/2Mo1/2)O-3 (SMM) microwave dielectric ceramic was successfully prepared by solid-state sintering method, showing excellent dielectric properties. Analysis of Raman scattering and FTIR spectra revealed the vibration characteristics of the lattice, with stretching vibration of Mg/MoO6 having the greatest influence on dielectric properties in the SMM sample.