Microwave dielectric properties of Li2MgTiO4 ceramics synthesized via high energy ball milling method

Abstract

ABSTRACTLi2MgTiO4 ceramics were prepared with Li2CO3, TiO2 and MgO by high energy ball mill method. After mixtures ball-milling 30 h and calcining at 700°C, the homogenate Li2MgTiO4 powders 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 Li2MgTiO4 ceramics sintered at high temperature existed with some Mg2TiO4. The Li2MgTiO4 ceramics at 1250°C had an excellent microwave dielectric properties ϵr = 12.17, Q × f = 42000 GHz and an τf = −23 ppm/°C