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

• Published in: Journal of materials science. Materials in electronics 2021-07, Vol.32 (13), p.17191-17199
• Main Authors: Yu, Wenhao, Lv, Jiqing, Shi, Feng, Song, Kaixin, Lei, Wen, Zhou, Huanfu, Qi, Ze-Ming, Wang, Jing
• Format: Article
• Language: English
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Crystal lattices; Crystal structure; Damping; Dielectric properties; Far infrared radiation; Infrared analysis; Infrared spectra; Materials Science; Optical and Electronic Materials; Perovskite structure; Perovskites; Raman spectra; Spectrum analysis; Strontium; Vibration analysis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-021-06182-0

Sr(Mg 1/2 Mo 1/2 )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, ε r = 7.39 and tan δ  = 8.19 × 10 –4 . The theoretical properties calculated by the C-M and damping equations are of ε r  = 7.03 and tan δ  = 6.19 × 10 –4 , which agrees well with the experimental values ( ε r  = 7.84 and tan δ  = 6.59 × 10 –4 ). The results show that the stretching vibration of Mg/MoO 6 has the greatest influence on the dielectric properties of the SMM sample.