Characterization and application of silver molybdenum vanadate as a substrate of dual-band filter for 5G system

• Published in: Applied physics. A, Materials science & processing Vol. 129; no. 8
• Main Authors: Huang, Yu-Ting, Huang, Ching-Cheng, Wu, Chia-Chien, Hsu, Tsung-Hsien, Huang, Cheng-Liang
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2023; Springer Nature B.V
• Subjects: Applied physics; Ceramics; Characterization and Evaluation of Materials; Condensed Matter Physics; Dielectric properties; Dielectric strength; Lattice energy; Machines; Manufacturing; Materials science; Microwave frequencies; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Processes; Substrates; Surfaces and Interfaces; Synthesis; Thin Films; Unit cell; ceramics; AgMoVO; ULTCC; Unit-cell volume; Microwave dielectric properties
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-023-06836-2

This research employed a conventional solid-state technique to synthesize a novel AgMoVO 6 ceramic material and conducted an analysis of its microwave dielectric properties. The analysis revealed that the sample synthesized at 520 °C possessed a monoclinic structure and belonged to the C2/m (12) space group, indicating a pure AgMoVO 6 phase. The dielectric constant of the ceramic was primarily influenced by its density, porosity, and ionic polarizability. Moreover, an increase in the packing fraction and lattice energy significantly enhanced the Q  ×  f values of the ceramic. The correlation between the bond valence of the specimen and its τ f value was found to be strong. Furthermore, the study demonstrated that the dielectric characteristics of the specimens were highly dependent on their unit-cell volume, which critically affected their microwave dielectric properties. Notably, the phase-pure AgMoVO 6 ceramic exhibited exceptional dielectric properties at microwave frequencies, with an ε r of ~ 12.4, Q  ×  f of ~ 21,300 GHz, and τ f of ~ –46.9 ppm/°C. Additionally, the ceramic material has been successfully employed in the design of a dual-band filter, showcasing its potential for utilization in 5G systems.