Microwave dielectric properties of Li 2 MgTiO 4 ceramics synthesized via high energy ball milling method.

Li2MgTiO4ceramics were prepared with Li2CO3, TiO2and MgO by high energy ball mill method. After mixtures ball-milling 30 h and calcining at 700°C, the homogenate Li2MgTiO4powders with average particle size of 160 nm were obtained. The pure phase obtained temperature was about 300°C lower than that by a conventional solid-state reaction process. Due to Li+evaporation, the Li2MgTiO4ceramics sintered at high temperature existed with some Mg2TiO4. The Li2MgTiO4ceramics at 1250°C had an excellent microwave dielectric propertiesϵr= 12.17, Q × f = 42000 GHz and an τf= −23 ppm/°C [ABSTRACT FROM AUTHOR]