Nanopowders preparation and dielectric properties of low-fired Li_3Mg_2NbO_6 ceramics

摘要

Abstract The pure phase of Li~(3)Mg~(2)NbO~(6)powders was fabricated with an average grain size of 222 nm at 800 °C derived from high energy ball-milling method. By using the nanopowders as a precursor, well-densified Li~(3)Mg~(2)NbO~(6)ceramics were obtained with a relative density of 95.9% at 950 °C, which is 300 °C lower than that required by the conventional ball-milling method. Low-fired Li~(3)Mg~(2)NbO~(6)ceramics exhibited good microwave dielectric properties of ε ~( r ) = 18.0, Q  ×  f  = 51,870 GHz, τ ~( f ) = − 23.01 ppm/°C, which suggests the developed materials are suitable for low-temperature co-fired ceramic applications.