Low temperature sintering and microwave dielectric properties of LiMgVO_4 ceramics

摘要

LiMgVO_4 ceramics were prepared by the conventional solid-state reaction method. Their structure and microwave dielectric properties have been investigated in relation to sintering condition. The XRD patterns of sintered samples revealed the single-phase formation with orthorhombic structure. As sintering temperature/time increased, the bulk density, ε_r and Q × f values increased to maximum and then decreased, respectively, while τ_f value did not change remarkably. The LiMgVO_4 ceramics sintered at 700 ℃ for 4 h showed optimized microstructure and microwave dielectric properties of ε_r = 8.86, Q × f = 23,300 GHz (at 10.2 GHz) and τ_f = -140 ppm/℃, and it did not react with Ag electrode, which make it a promising candidate for LTCC applications.