A novel dielectric ceramic Na0·48La0·52MoO4 with excellent thermal stability for LTCC applications

Abstract

This article reports the fabrication of a novel molybdate compound, Na0·48La0·52MoO4 (NLM), through the solid-state reaction method. The structural characterization and dielectric properties of NLM were conducted via powder X-ray diffraction, SEM, laser Raman spectroscopy, and vector network analysis. The research results indicate that the sintering temperature directly affects the firing process and microwave dielectric properties. NLM ceramics sintered at 920 °C demonstrate excellent microwave dielectric properties of εr = 8.86, Q × f = 61,378 GHz (at 13.5 GHz) and τf = −10.8 ppm/°C. Furthermore, NLM ceramics exhibit favorable chemical compatibility with Ag. These findings underscore the significant potential of NLM ceramics for utilization in LTCC applications.