Synthesis and preparation of Li2MnO3 microwave dielectric ceramics.

Pure Li₂MnO₃ powders were synthesized at 900 °C for 4 h by a solid-state reaction method. Li₂MnO₃ ceramics were prepared in the temperature range of 1100 °C to 1250 °C. All the samples displayed a single phase structure. The microwave dielectric properties of sintered samples were closely related to sintering temperature and microstructure. The Li₂MnO₃ ceramics exhibited a well microwave dielectric properties of ε_r = 12.5, Q × f = 43150 GHz, τ_f = −9.5 ppm/°C at 1200 °C. [ABSTRACT FROM AUTHOR]